Stretchable Binders for EV Battery Electrodes

Binder resin for lithium battery anodes and cathodes that enables long cycle life by reducing capacity fade in high-capacity materials like silicon. The binder is a high-elasticity polymer composite containing a cross-linked polymer matrix with dispersed conductive reinforcement. The elastic binder prevents particle expansion/contraction damage during charging/discharging. The cross-linked polymer network provides structural integrity and lithium-ion conductivity. The elasticity allows reversible deformation without fracture. The binder chemically bonds to the active material and current collector.

Source

A lithium battery anode with improved cycle life for high-capacity anode materials like silicon or tin. The anode active layer contains high-capacity anode particles bonded together using a unique binder resin. The binder resin has a high-elasticity polymer with recoverable strain over 5% and lithium ion conductivity over 10^-5 S/cm. This polymer allows expansion/contraction of the high-capacity anode particles during charge/discharge without cracking or delamination.

Source

A high capacity lithium ion battery with improved cycling performance and reduced cracking by using an ionic crosslinked polymer binder with conductive properties. The binder is made of a viscous polymer like an ionomer with carboxyl groups and an amine-containing compound, which crosslink through ionic interaction and hydrogen bonding. This forms a tough and firm network that tightly coats the active material without adding a separate conductive agent. The binder contains both an elastic polymer network and a ductile conductive network, providing better binding of the active material in thick electrodes to prevent cracking and capacity fade.

Source

A binder for lithium-ion battery electrodes that improves adhesion to active materials like silicon and enables better cycle life. The binder contains a first polymer with hydroxyl and carboxyl groups to bond with active materials, and a second polymer for electronic conductivity. The polymers have specific ratios to balance binding and conductivity. The first polymer forms a crosslinked network structure with active materials to prevent expansion and cracking. The second polymer coats the first polymer and provides ion and electron pathways.

Source

A conductive material paste composition for secondary battery electrodes that enables formation of electrode layers with improved dispersion of conductive nanomaterials like carbon nanotubes and enhanced adhesion to the current collector. The paste uses a binder containing a specific copolymer with a weight average molecular weight of 170,000 to 1,500,000. This copolymer composition improves dispersion of nanomaterials like carbon nanotubes in the slurry and electrode layers. It also improves adhesion between the electrode and current collector when applied as an undercoat. This leads to better battery performance when using electrodes made from this paste.

Source

Electrode material for batteries with improved electronic conductivity, especially for all-solid-state batteries, that uses a specific elastomer binder to disperse conductive fibers. The electrode material includes active material, conductive fibers, and elastomer binder. The elastomer has repeating units with aromatic rings, like styrene, and contains at least 15% of these units. This elastomer improves fiber dispersion in the electrode compared to traditional binders. The small fiber size and elastomer adsorption promote fiber dispersion. This electrode material allows higher fiber content without aggregation for better conductivity.

Source

Conductive cross-linked binder for electrodes that allows preparing battery electrodes without conductive additives. The binder is made by mixing alginate solution with MXene flakes and stirring at low temperature to form a uniform mixture. This cross-linked binder provides both adhesion and electronic conductivity without needing additional conductive additives in the electrode slurry. It allows preparing electrodes with high loading of active material like sulfur without volume expansion issues. The cross-linked binder can spontaneously form hydrogen bonding between the MXene flakes and alginate to bind the electrode materials together.

Source

Lithium secondary battery with improved durability by multidirectionally fiberizing the binder in the active layer. This involves mixing the electrode materials at low temperature, heating and primary fiberization, pulverizing at room temp, and secondary fiberization. The fiberized binder provides better adhesion between components and reduces particle dispersion compared to non-fiberized binders. The fiberized binder is made by multidirectional fiberization using steps like kneading and pulverizing at different temperatures. This improves cohesion and durability of the electrode active materials, conductive materials, and binder.

Source

Preparation method for battery electrode sheets using conductive polymers as binders instead of traditional inert binders like PVDF. The method involves mixing the active material, conductive polymer, and conductive agent directly on the current collector and pressing it together without using a solvent slurry. The conductive polymer forms electrical pathways between the active material particles, reducing the need for additional conductive agents. This increases the active material content in the electrode and improves energy density compared to using inert binders.

Source

A conductive composite water-based adhesive for lithium-ion battery electrodes that provides better adhesion, flexibility, and conductivity compared to conventional binders. The adhesive contains a polyacrylic acid or polyacrylate water-based binder with a conductive filler like carbon black. The filler content is 0.1-10 wt% to balance bonding performance and conductivity. By incorporating conductive fillers into the binder, it allows the binder to play a stronger role in lithium-ion batteries and provides better electrode adhesion and conductivity.

Source

Electrode binder composition, electrode, secondary battery, and device with improved electrode adhesion and cycling performance for high capacity silicon-based anodes and cathodes in lithium batteries. The binder is a thermoplastic polyurethane made from a polyether alcohol, isocyanate, chain extender, and optional silane adhesion promoter. It has higher elasticity and better adhesion to current collectors compared to conventional binders like PVDF. The thermoplastic polyurethane binder enables the electrode active material to hold together better during cycling, reducing solvation and cracking compared to PVDF.

Source

Secondary battery with improved cycle life and reduced internal resistance for electric vehicles. The battery uses a composite binder containing an active material like Si, Sn, or C, a conductive matrix material, and an organic polymer. This composite binder is used in the negative electrode tab to bind the active material and matrix. It reduces expansion and delamination during cycling compared to conventional binders. The composite binder can be prepared by surface treatment, grafting, and solvent adjustment techniques.

Source

Electrode for electrochemical devices like lithium-ion batteries that has improved flexibility and allows increasing energy density and output characteristics. The electrode contains an electrode mixture layer with a specific composition and properties. The mixture layer has a conductive material containing fibrous conductive particles, a binder polymer, and the electrode active material. The fibrous conductive particles are 10-1000x longer than width. The binder polymer contains nitrile groups and has a Mooney viscosity of 70-150 ML1+4, 100°C. The electrode mixture layer contains 0.3-1.5% fibrous conductive particles by mass, 50-200 parts polymer per 100 parts conductive material, and the binder at 0.3-2.0% by mass.

Source

Composite binder for lithium-ion battery electrodes that improves adhesion and conductivity compared to conventional dry-process binders. The composite binder is made by polymerizing a binder monomer, an organic acid monomer, and a conductive material monomer. This provides a polymer with binding, acidic functionality, and conductivity for improved electrode adhesion and cycle life, as well as lower internal resistance and better rate capability compared to traditional dry electrode binders.

Source

Electrode for lithium secondary batteries like Li-ion batteries and all-solid-state batteries that uses a fibrillated binder to minimize electron conduction path blocking. The fibrillated binder is made by applying shear stress to a mixture of active material and a binder powder that fibrillates when compressed. This fibrillated binder has lower density compared to normal binders. The fibrillated binder reduces short circuits by minimizing covering of active material and solid electrolyte surfaces compared to conventional binders.

Source

Active material-conductive material-binder composite for lithium-ion batteries that reduces cracking and side reactions during charging and discharging, improves cycle life, and enables thicker electrodes. The composite material has the active material coated with a conductive carbon nanotube layer and a thermosetting binder. This coating prevents micro-cracks from forming inside the active material during cycling and suppresses side reactions between the active material and electrolyte. The composite material is prepared separately from the electrode slurry components and mixed in optimized ratios to uniformly distribute the conductive nanotubes and binder throughout the active material. This avoids segregation during solvent drying and slurry coating steps.

Source

Highly elastic binder for all-solid-state batteries that minimizes electrode expansion and contraction during charging and discharging. The binder contains a polymer with carbonyl groups and a linker with amino groups at the ends. Some of the oxygen atoms in the carbonyl groups are replaced with nitrogen atoms from the amino groups, allowing crosslinking between the polymers. This crosslinked binder provides high elasticity to prevent internal defects during electrode expansion.

Source

Binder for lithium-ion batteries with improved cycle life and expansion performance for high expansion anode materials like silicon. The binder has specific ratios of anionic polymer and organic amine cationic polymer, and a targeted molar percentage of anionic monomers containing carboxyl or sulfonic groups. This composition balances crosslinking for strength with flexibility to prevent binder breakage during anode expansion. The binder also has a specific weight average molecular weight range for both polymers. The binder is used at 1-8% weight fraction in the anode active material layer.

Source

Method for manufacturing a negative electrode plate for lithium-ion batteries with improved cycle life and consistency by using a binder with compression elasticity. The binder is made from materials like styrenic block copolymers (SEBS), high impact polystyrene (HIPS), ethylene propylene rubber (EPR), and crosslinking agents like di(tert-butyl peroxy) diisopropylbenzene (BIPB) and dioctyl sebacate (DOS). This binder forms a three-dimensional network in the negative electrode coating that entangles the active material and conductive agent powders. It has micro-porous microstructure and compression elasticity to adaptively follow the volume changes of the negative electrode active material during charging/discharging. This keeps the battery poles close together, stabilizes pole group distance,

Source

Secondary battery electrode with improved tensile strength and flexibility for batteries like lithium-ion cells. The electrode uses a binder with fibers of different sizes. The binder contains larger diameter fibers (>6 µm) and smaller diameter fibers (0.01-2 µm). This mixture of fiber sizes provides enhanced mechanical properties compared to a homogeneous fiber size. The larger fibers provide strength and the smaller fibers enable flexibility. The binder content is 1-5 wt% and the electrode has a contact angle deviation of 0.01-5 degrees. The electrode can be manufactured by a dry mixing process with faster initial mixing and slower secondary mixing to form the fiberized binder. This process avoids damaging the active material and provides the desired fiber size distribution.

Source

Electrode binder for lithium-ion batteries and other electrochemical devices that improves cycle life and performance. The binder meets two criteria: elastic modulus E' is at least 4.5 x 106 Pa and viscosity modulus E'' is at least 0.9 x 106 Pa when measured at 25°C with a 1 µm indentation and 1 Hz frequency. This dynamic viscoelasticity behavior is achieved by swelling the binder in the electrolyte solvent and drying it to form a 1-2 mm thick film. The binder can be a (meth)acrylate polymer containing a hydroxyl group structural unit.

Source

Binder for high surface density lithium-ion battery electrodes that improves conductivity and prevents cracking in thick electrode coatings. The binder contains imide polymer, conductive fibers, and particles. The fibers have reactive groups that chemically bond with the imide polymer. This forms a stable conductive network with the fibers and particles dispersed throughout the polymer. It provides a thick coated electrode with improved conductivity and reduced cracking compared to traditional binders.

Source

Lithium secondary battery with improved cycle life and flexibility of the positive electrode. The battery has a wound structure with an anode, a high elastic modulus positive electrode layer, and a low elastic modulus positive electrode layer. The high elastic modulus layer provides cycle performance while the low elastic modulus layer increases flexibility. This allows thickening the positive electrode without cracking during winding. The low elastic modulus binder has lower stiffness than the high elastic modulus binder.

Source

A conductive binder for silicon negative electrodes in lithium batteries that improves cycle life and capacity retention by providing adhesion, ionic conductivity, and electronic conductivity to the silicon particles. The binder is an imidazole ionic liquid polymer with carboxyl, PEG, and polyaniline segments. The carboxyl bonds to silicon, PEG adaptability reduces volume change, and polyaniline provides conductivity. This binder prevents detachment of silicon from the current collector, enhances lithium ion diffusion, and reduces formation of dead silicon.

Source

A conductive binder for silicon negative electrodes in lithium batteries that improves cycle life by preventing separation of the active material from the conductive agent during volume expansion. The binder is an electrically conductive adhesive containing a polymer with sulfonic acid and carboxyl groups and a separate conductive polymer. The binder's composition allows it to have both good adhesion to the silicon and good electrical conductivity to maintain the negative electrode's conductivity path during expansion. The binder's polymer structure with acidic groups improves processing and dispersibility compared to traditional conductive polymers.

Source

Binder for battery electrodes that improves cycle life by reducing differentiation and delamination of battery pole pieces during expansion and contraction. The binder is a composite of a high molecular weight binding material and a conductive polymer like polypyrrolidinone or polyfluorene. The conductive polymer provides electronic conductivity between active materials while the high molecular weight binder provides strong adhesion to prevent delamination. This improves electrical integrity and reduces differentiation during expansion/contraction compared to traditional binders.

Source

Binder for anode of secondary battery that provides elasticity to withstand anode volume changes during charging/discharging, improves battery life and processability compared to conventional binders. The binder is a copolymer with specific repeating units and composition. The copolymer has a storage modulus of 100 MPa or more at 100°C, providing the required elasticity. The copolymer composition includes controlled ratios of first, second, third, and fourth repeating units. The binder is made by emulsion polymerization using specific monomers, initiator, and emulsifier.

Source

Binder for negative electrode of secondary batteries that provides improved cycle life by enabling the negative electrode to expand and contract without delamination during charging and discharging. The binder has a storage modulus of 100 MPa or more at 100°C to provide enough elasticity for volume changes. It can be made by emulsion polymerization. The binder is used in negative electrode mixtures, electrodes, and batteries to improve cycle life compared to conventional binders.

Source

Electrode for secondary batteries with improved tensile strength and resistance reduction. The electrode uses a dry mixing process for the active material, conductive material, and binders. This involves mixing the components without any liquid solvent. After mixing, the materials are compacted into a free-standing film. This film is then attached to the current collector to make the electrode. The dry mixing and film formation steps improve the electrode's tensile strength compared to wet mixing methods. The dry mixing also allows using different binders, with one binder attached to the surface of the other. This further improves the electrode properties.

Source

Electrode for secondary batteries with improved strength and resistance reduction effects, as well as a method to manufacture such electrodes. The electrode has a composition made by dry mixing active material, conductive material, a first binder with higher molecular weight, and a second binder with lower molecular weight. The mixed composition is shaped into a free-standing film before attaching it to the current collector. This allows forming a strong, freestanding electrode layer without the need for high-temperature sintering. The higher molecular weight binder improves electrode tensile strength while the lower molecular weight binder reduces resistance.

Source

Binder composition, preparation method, and lithium-ion battery with improved performance for high expansion materials like silicon anodes. The binder has two components: a high modulus component (elasticity >40 MPa) and a high ductility component (elongation >300%) that balance volume expansion suppression and processability. The binder improves stability and prevents cracking of high expansion materials like silicon during battery fabrication and cycling. The binder can be prepared by copolymerizing acrylic acid, methacrylic acid, acrylonitrile, butadiene, and crosslinkers.

Source

A three-dimensional hybrid conductive binder for lithium batteries that improves the performance of high energy density batteries with high capacity electrode materials like silicon. The binder has a synergistic effect between the polymer matrix and a three-dimensional conductive network to suppress volume expansion and improve capacity and rate performance. The binder is made by crosslinking a conductive polymer like polyaniline with a crosslinking agent to form a three-dimensional conductive network. This network works with the polymer matrix to effectively inhibit the expansion of high capacity electrode materials like silicon during lithium insertion/deinsertion. The binder has low dosage, strong adhesion, and electrical conductivity compared to conventional binders like PVDF or SBR/CMC.

Source

Composite binder material for electrode mixtures used in energy storage devices like batteries and supercapacitors. The composite binder has a polymer matrix dispersed with mexene particles, which are two-dimensional transition metal carbides. This composite provides improved electrical conductivity compared to traditional binders. The mexene particles also have hydrophilicity, allowing use of aqueous solvents instead of organic solvents. The composite binder has low resistance and strong adhesion to electrode active materials.

Source

Slurry for secondary battery electrodes that improves dispersion, adhesion, and cycle life of high-nickel-content layered oxide cathodes. The slurry contains an elastic binder with segments that hydrogen bond with the cathode material and current collector. This binder has a soft segment for dispersion and a hard segment for adhesion. The binder also has a polyol structure. At shear rates of 0.1-1000 s-1, the binder deposits on the cathode surface during mixing.

Source

Binder for electrochemical devices like batteries that reduces resistance, gas generation, and improves capacity retention. The binder contains a polymer with segments: one segment has a guest group in the side chain, the other segment has a host group in the side chain. This allows the binder to follow volume changes of the active materials in electrodes during charge/discharge without breaking apart like conventional binders.

Source

Highly conductive binder for negative electrodes in lithium-ion batteries that improves cycle life and reduces resistance compared to conventional binders. The binder composition includes specific ratios of components like acrylonitrile copolymer binder, elastic conductive nanocomposite particles, carbon black, single-arm carbon nanotube suspension, and deionized water. The optimized blend provides better mechanical properties, electrolyte resistance, and electrochemical stability compared to traditional binders.

Source

All-solid-state batteries with improved cycle life for lithium-ion batteries using solid electrolytes. The battery design uses binders that crosslink during manufacturing to prevent expansion and contraction of the electrodes during charging/discharging. This reduces interface resistance and prevents lithium plating/dendrite formation. The binders in the positive and negative electrodes can be different, with one crosslinked. This allows the electrodes to expand/contract without separating from the electrolyte layer. The crosslinked binder keeps the electrode shape while the other binder allows expansion. The crosslinked binder can also improve adhesion to the current collector.

Source

All-solid-state lithium ion battery with improved performance and reduced cracking compared to conventional batteries. The key innovation is using a specific type of binder called hydrogenated acrylate-nitrile rubber (H-ANBR) with a limited amount of residual double bonds. The H-ANBR binder allows the cathode active material, solid electrolyte, and conductive additives to be coated onto a substrate without cracking. The H-ANBR binds the components together without reacting with them like traditional nitrile rubbers do. The limited double bonds prevent excessive hardening.

Source

Electrode mixture for secondary batteries with improved flexibility that can prevent deformation of the electrode assembly during battery expansion without adding extra layers. The mixture contains a binder with a low modulus (30 MPa or less) that allows the electrode to expand and contract without cracking or delamination. This prevents the electrode from changing shape during repeated charging and discharging. The low modulus binder provides buffering against volume changes in the electrode.

Source

High capacity lithium ion battery with improved cycle life and flexibility. The battery uses a specific combination of binders for the positive electrode to prevent cracking during bending. The positive electrode binder contains both a nitrile-group containing acrylic polymer and a fluorine-containing polymer. The nitrile polymer swells appropriately in the electrolyte but does not dissolve completely. This prevents excessive swelling and electrolyte penetration. The fluorine polymer provides additional binding. The nitrile-containing binder allows high active material density without cracking. The binder combination with controlled swelling and insolubility improves cycle life and prevents capacity fade. The fine-grained conductive powder in the positive electrode also helps capacity. The negative electrode uses a combination of alloy and carbon materials.

Source

Highly elastic binder resin for lithium battery cathodes that prevents capacity fade and improves safety. The binder contains an elastomeric polymer with a high elastic deformation strain of 5% or more. This elasticity prevents catalytic decomposition of the electrolyte during cycling by separating the cathode particles from direct contact. The elastomeric polymer can contain crosslinked chains with ether, nitrile, benzoyl peroxide, or cyano linkages. It can also have composites with lithium ion conductors, lithium salts, and reinforcing materials.

Source

Electrode structures for lithium-ion batteries with improved flexibility, performance stability, and safety compared to conventional electrodes. The electrodes have a compliant, electrically and ionically conductive structure formed using a specific binder composition. The binder composition contains a high concentration of conductive filler particles dispersed in a polymer binder. This binder composition allows the formation of electrodes with stable, conductive interfaces between the electrode particles and filler particles. The resulting electrode structure has high electrical and ionic conductivities, flexibility, and adhesion between components.

Source

Integrated electrically conducting polymeric binder composition for adhesives used in electrodes of energy storage devices like batteries and capacitors. The binder has both adhesiveness and electrical conductivity. The composition contains 80 wt% of a conducting polymer dissolved in a solvent with multiple polar groups. It also has aromatic organic acid compounds with alkyl substituents. The binder improves electrode performance compared to conventional adhesives.

Source

Electrode for lithium-ion batteries with improved cycle stability and capacity retention. The electrode uses a binder material made from elastomers, like natural rubber or synthetic elastomers, that contains ionic liquids. The elastomeric binder allows flexibility and prevents delamination, while the ionic liquids enhance adhesion and reduce leaching of active material. The elastomeric binder also improves cycle stability and capacity compared to traditional binders like PVdF.

Source

Cathode for lithium-ion batteries with higher active material content and improved capacity without solvent evaporation. The cathode composition is prepared by melt processing of active material, binders, fillers, and non-volatile organic compounds without solvent. The binders are crosslinked elastomers like hydrogenated nitrile rubber (HNBR) that provide mechanical cohesion without evaporation. The non-volatile organic compounds are used in the battery electrolyte. This allows higher active material loading above 90% compared to solvent-based processes. The cathode can have a current collector with a film of the melt-processed polymer composition.

Source

Binder composition for secondary battery electrodes that enables better dispersion of conductive materials when used in slurry electrode preparation. The binder contains a specific copolymer with a low viscosity (ML1+4, 100°C) of 40 or less. This copolymer has alkylene units and nitrile group-containing monomer units. The low viscosity copolymer disperses conductive materials well in electrode slurries, preventing agglomeration.

Source

Preparing an aqueous composite binder for lithium ion battery electrodes with improved ion and electron conductivity. The method involves dissolving a flexible polymer like polyacrylate in water, followed by adding a conductive agent like carbon nanotubes or graphene to form a composite material. This composite binder is used to coat lithium ion battery electrodes instead of traditional binders like PVDF. The composite binder has both ionic and electronic conductivity to enhance lithium ion migration and reduce battery polarization and internal resistance compared to conventional binders. The aqueous composite binder is advantageous as it uses water as a solvent instead of organic solvents.

Source

Slurry composition for forming lithium secondary battery electrodes using cellulose fiber as a binder to improve adhesion between the electrode active material and current collector. The slurry contains the electrode active material, conductive additive, and refined cellulose fiber dispersion. The cellulose fibers miniaturized by high-pressure homogenization act as a water-based binder when dried. The uniformly dispersed slurry enables better electrode layer coating and adhesion compared to organic solvent binders. The miniaturized cellulose fibers provide a network structure that binds the electrode components to the current collector.

Source

Binder for rechargeable battery electrodes, slurry for battery electrodes, electrode for rechargeable batteries, and rechargeable batteries with improved performance. The binder contains a copolymer with specific properties. The copolymer has a Mooney viscosity between 10 and 100 ML@1+4 when heated to 100°C. It also contains an Al Killen structure unit and a nitrile group content monomeric unit in the repeat units. This allows distributing electrode active material and conductive additives at high concentrations while maintaining slurry stability. The slurry forms dense electrode layers without sedimentation or gelation. The electrodes with this slurry have better battery performance compared to conventional slurries.

Source

A conductive polymer binder for lithium batteries that improves cycle life compared to traditional binders. The binder is a polymer that can be used in lithium battery electrodes. It provides better conductivity and adhesion to the electrode active material compared to conventional binders. This improves cycle life and capacity retention, especially for high capacity materials like lithium-rich cathodes and high volume expansion anodes like lithium metal. The conductive polymer binder allows better electron transport and prevents electrode delamination during charging/discharging.

Source