Reduce Interfacial Resistance in Solid State EV Batteries

A lithium-ion battery coating that prevents delamination of active material particles and soot during cell assembly. The coating is applied to the anode and cathode current collector interfaces, forming a seal between the active layer and collector. The coating is created through a photosensitive polymerization process that forms irreversible crosslinked networks upon exposure to UV radiation. The coating protects against particle leaching and soot migration during cell assembly, while maintaining electrical integrity.

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All-solid-state secondary battery with enhanced electrode alignment and lithium metal formation. The battery features a bipolar cell architecture where the positive electrode current collector and negative electrode current collector layers are stacked in a specific orientation. The current collector layers are positioned with an extension portion that intersects the stacking direction, while the negative electrode current collector layer has an extension portion that extends in the opposite direction. This design configuration enables uniform lithium metal deposition on the negative electrode current collector layer during charging, while maintaining alignment between the electrode layers. The battery also incorporates a solid electrolyte layer that is a room-temperature molten salt.

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All-solid-state battery featuring a unique electrode design where active material layers have interdigitated contacts with external electrodes. The battery comprises a current collector, an active material layer with an extension portion, and a solid electrolyte layer interposed between the active material layers. The active material layer's extension portion is positioned adjacent to the external electrode, creating a direct interface while maintaining electrical contact. This design enables high-capacity solid-state batteries with improved interfacial contact and reduced internal resistance.

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All-solid-state battery with uniform interface between electrode and solid electrolyte layer, featuring a continuous solid electrolyte layer that seamlessly connects the electrode. The battery comprises a solid electrolyte layer, an electrode, and a solid electrolyte layer. The solid electrolyte layer is formed by a continuous solid electrolyte material that connects the electrode, while the electrode is made from a solid material such as metal oxide. The solid electrolyte layer is formed through a continuous process that connects the electrode, with the solid electrolyte layer serving as the primary interface between the electrode and the solid electrolyte.

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An all-solid-state battery that operates at room temperature and low pressure, comprising an anode current collector, a buffer layer, a solid electrolyte layer, a cathode active material layer, and a cathode current collector. The buffer layer is an electroconductive material layer with an alloying metal that forms a stable interface with the anode current collector, while the solid electrolyte layer contains a lithium-based solid electrolyte. The cathode active material layer is disposed on the solid electrolyte layer, and the cathode current collector is disposed on the cathode active material layer.

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All-solid-state battery with enhanced safety and efficiency through stress relief. The battery incorporates an elastic layer that distributes compressive stress during cell assembly and discharge, particularly beneficial when cathode thickness increases. The elastic layer is formed through a foam process after lamination, allowing precise control over its thickness and foam structure. This design enables uniform pressure distribution across the battery's contact surfaces during charging and discharging, while preventing dendrite formation during charging. The elastic layer's foam structure also enables efficient stress relief during compression and recovery processes.

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All-solid battery with enhanced safety features through a novel design that eliminates short circuits between electrodes. The battery incorporates a unique configuration where the solid electrolyte layer extends beyond the anode collector, while maintaining contact between the cathode and anode layers. This design prevents contact between the cathode and anode surfaces during manufacturing, significantly reducing the risk of short circuits. The solid electrolyte layer is positioned on the insulating layer, which extends further than the anode collector, preventing direct contact between the cathode and anode layers. The design enables safe operation of the battery by preventing lithium precipitation during charge.

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All solid battery with enhanced reliability through optimized electrode layer interfaces. The battery structure comprises a solid electrolyte layer sandwiched between two electrode layers, with specific interface characteristics between the electrode layers and the solid electrolyte layer. The electrode layers are comprised of conductive materials and active materials, while the solid electrolyte layer has oxide-based solid electrolyte. The interface characteristics between the electrode layers and the solid electrolyte layer are engineered to prevent peeling, while the interface characteristics between the solid electrolyte layer and the electrode layers are optimized to enhance cell performance.

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All-solid-state battery with improved interfacial bonding between anode and electrolyte layers through controlled pressurization. The battery comprises a solid electrolyte layer between the positive electrode and negative electrode layers, with a mixed layer comprising an anode material and electrolyte material. The mixed layer thickness is optimized between 2-50 μm, with specific volume ratios of anode to electrolyte. Pressurization during manufacturing ensures uniform bonding between the anode and electrolyte layers, preventing damage to either component.

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An electrode structure for all-solid-state batteries that enables volume compensation through internal compression. The structure comprises a current collector with a folded portion where a cathode and anode active materials are arranged in series. A compression pad is integrated within this folded section, specifically positioned between the cathode and anode layers. This compression pad maintains uniform thickness across the cell while accommodating the lithium deposition reaction in the negative electrode. The folded structure enables efficient volume compensation through the compression pad, thereby maintaining cell performance and preventing thermal runaway.

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All-solid-state battery with enhanced safety and performance through a novel negative electrode design. The battery incorporates a porous polymer support with a metal coating layer, where the metal layer is formed on the support surface. The metal layer acts as both the negative electrode current collector and anode current collector, eliminating the need for separate anode materials. The design enables precise control of lithium deposition through the metal layer, while maintaining structural integrity during charging and discharging. The porous polymer support ensures reliable lithium deposition and stress reduction, while the metal layer provides electrical conductivity. The battery achieves improved safety, reduced stress, and enhanced performance compared to conventional solid-state batteries.

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Solid-state battery with enhanced cycle life and safety features. The battery comprises a laminated structure with a positive electrode containing active material and current collector layer, a negative electrode containing active material and current collector layer, and a solid electrolyte layer. The current collector layer is specifically designed to minimize thermal expansion and contraction during charging and discharging, while the active material layers are optimized for their respective electrode positions. The solid electrolyte layer enables reliable operation in a controlled environment, eliminating the need for a conventional liquid electrolyte.

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Solid-state battery with improved thermal management during charging. The battery features a solid electrolyte layer with integrated buffer zones at the electrode-electrolyte interface. The buffer zones have lower densities than the active materials in the corresponding electrode layers, creating a localized thermal gradient that helps prevent thermal runaway. This design enables the battery to maintain stable operating temperatures during charging while maintaining structural integrity.

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A multilayer all-solid battery that achieves enhanced reliability through optimized electrode and electrolyte interfaces. The battery features alternating electrode and collector layers with different electrode paste and electrolyte particle sizes, ensuring superior interface roughness between adjacent layers. The electrode layers have thicker electrolyte layers with optimized particle sizes, while the collector layers have thinner electrolyte layers with reduced particle sizes. This design approach addresses the challenges of peeling and short cycling associated with conventional all-solid batteries by maximizing interface roughness between adjacent layers.

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A method to improve the surface uniformity and long-term durability of lithium-ion battery anodes through controlled microgel incorporation. The method involves creating an anode slurry with less than 50 microgels per area of 10.2 cm2, which significantly enhances surface roughness while maintaining uniformity. The slurry is then applied to an anode current collector, dried, and rolled to form a uniform anode layer. This approach enables the creation of anode surfaces with surface roughness as low as 1.0 μm and standard deviation as low as 0.05, thereby preventing lithium plating and improving battery lifespan.

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A solid-state battery design that addresses the limitations of traditional solid electrolyte interphase (SEI) management in solid-state batteries. The design incorporates a novel electrode architecture where the active material layer is manufactured in a controlled, slow process to ensure uniform distribution of the electrolyte. This approach eliminates localized SEI formation and promotes consistent ion transport across the electrode thickness, thereby reducing internal resistance and improving overall battery performance.

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Positive electrode for solid-state batteries that prevents cracking during lamination pressing through strategically positioned leads. The electrode features a positive electrode collector with a built-in active material layer containing the active material, and strategically placed leads on the collector's outer periphery. The leads form a solid electrolyte interface that prevents pressure-induced cracking during lamination. This design enables the electrode to maintain structural integrity even under high pressure conditions during manufacturing.

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All-solid battery with enhanced safety features that prevents short circuits between the cathode and anode layers. The battery architecture features a solid electrolyte layer extending beyond the anode layer, with a curved current collector that prevents direct contact between the anode and cathode layers. This design configuration ensures that the anode layer remains isolated from the cathode layer during manufacturing, preventing potential lithium precipitation and maintaining overall battery safety.

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Lithium-ion battery electrode with enhanced performance through a novel conductive layer design. The electrode comprises a current collector and an electrode active material layer with a conductive layer between them, containing solid electrolyte particles and conductive particles. The conductive layer has a solid electrolyte-conductive particle complex composition within 50-95% of the total layer thickness. This design addresses the conventional issues of electrolyte leakage and electrode resistance during battery cycling by maintaining electrical contact points during rolling. The electrode maintains high discharge capacity and durability even when the electrode density is increased.

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Solid-state lithium-ion battery with improved cycle life through enhanced electrolyte management. The battery comprises a current collector layer for the positive electrode, a positive electrode active material layer, a current collector layer for the negative electrode, a negative electrode active material layer, and a solid electrolyte layer that is disposed between the positive electrode active material layer and the negative electrode active material layer. The solid electrolyte layer is formed by a solid electrolyte containing an anion that is selectively incorporated into the current collector layers and the electrode active materials. This selective incorporation enables precise control over the electrolyte's anion distribution, reducing the risk of short circuits and improving overall battery performance.

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Electrochemical device comprising a current collector coated with an ion-conducting solid electrolyte material, where the current collector and the electrolyte material are in close contact. The current collector is formed from a metal or metal alloy and serves as both the anode and cathode in the device. The solid electrolyte material enables direct contact between the current collector and cathode, allowing lithium ions to move freely between the electrodes. The device can be manufactured through a layered structure approach, where multiple layers of cathode material and current collector are combined to form a single electrochemical cell.

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Electrode sheet for an all-solid state secondary battery that enables reliable performance even when bent into a roll state. The sheet features a conductive layer containing conductive particles and an electrode active material layer with a specific active material and inorganic solid electrolyte composition. The active material layer has a specific median diameter-to-Rz (Rz) ratio, while the inorganic solid electrolyte has a specific Rz value. This optimized configuration ensures stable peeling resistance even during bending, allowing the electrode sheet to be used as a component in laminated all-solid state battery cells.

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All-solid-state battery design and manufacturing method to improve adhesion between layers while maintaining battery performance. The battery has a positive electrode, negative electrode, and solid electrolyte sandwiched between them. The layers are prepared separately, then cut with laser to shape. The laser cutting creates heated regions where particles melt and re-solidify, increasing adhesion. This prevents layer delamination during battery cycling. The method involves preparing the layers separately, then laser cutting them to shape with heated regions at the edges.

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A novel approach to preventing sulfide generation in lithium-iron-phosphate (LFP) solid-state batteries by creating a protective layer on the negative electrode current collector. The layer, comprising a copper-based alloy, forms a barrier between the electrode surface and the electrolyte, preventing unwanted chemical reactions that can lead to sulfide formation. This layer effectively suppresses the formation of copper sulfide, which can compromise battery performance during charge and discharge cycles. The alloy composition and thickness can be optimized to achieve the optimal balance between electrochemical reactivity and barrier performance.

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All-solid-state secondary battery with improved capacity retention through a novel cathode design. The battery features a solid-state electrolyte layer between the positive and negative electrodes, where a sacrificial anode material with controlled conductivity is used to replenish lithium ions during initial charging. The sacrificial anode material, comprising a sacrificial active material and a conductive agent, provides the necessary lithium supply while preventing lithium depletion in the negative electrode. The design ensures efficient lithium replenishment through the sacrificial anode material's controlled ion and electron conductivity, enabling stable capacity retention even after multiple charge/discharge cycles.

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All-solid-state battery with enhanced energy density through optimized electrode material design. The battery comprises a positive electrode active material layer with a specific particle size ratio, where the average particle diameter of the first active material is between 2.0 and 4.3 micrometers, and the second active material has an average particle diameter of 2.7-4.0 micrometers. The radial pressing step during manufacturing further enhances the layer's structural integrity and contact surface area between active material and electrolyte.

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Li-Sn-based alloy solid electrolyte for high-performance solid-state batteries, comprising LiioSnBi2Se, where x=10, 11, or 12. The electrolyte exhibits superior thermal stability and electrochemical properties compared to conventional lithium-tin-based solid electrolytes, enabling wider operating temperature ranges and improved safety. The alloy solid electrolyte is prepared through a simple solution processing method that enables high purity and uniform composition control, making it suitable for applications requiring high energy density and long cycle life.

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Lithium-ion battery with improved electrode performance through optimized composite layer architecture. The battery comprises positive and negative electrodes with distinct composite layers, where the high-density layer has a higher material density than the low-density layer. The separator serves as a buffer zone between the layers, with its area ratio optimized to maintain the composite layer's capacity while ensuring effective electrolyte penetration. This configuration enables the battery to achieve higher capacity while maintaining the desired density balance between the high-density and low-density regions.

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Solid electrolyte membrane for lithium-ion batteries with improved conductivity and structural integrity. The membrane is formed through a novel slurry application process that ensures uniform thickness across the membrane thickness profile. This approach eliminates the conventional slurry coating method's limitations in achieving consistent membrane thickness, which is critical for maintaining ionic conductivity and preventing electrode expansion during operation. The membrane's uniform thickness enables precise control over the solid electrolyte layer's thickness distribution, which is essential for maintaining battery performance and preventing short circuits.

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All-solid-state power storage device with enhanced contact area between solid electrolyte layers through a novel laminated structure. The device features a positive electrode layer, a solid electrolyte layer, a negative electrode layer, and a negative electrode current collector arranged in a closed space. A polymer electrolyte exhibiting adhesive properties is incorporated into the solid electrolyte layer, creating a direct bonding interface between the solid electrolyte layers. The device achieves improved charge/discharge performance through enhanced contact area between the solid electrolyte layers, particularly when using a polymer electrolyte exhibiting adhesive properties.

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Manufacturing an all-solid-state battery with enhanced safety and efficiency through controlled surface roughness of the active material layer. The process involves forming the active material layer and applying a solid electrolyte layer through a controlled pressing step, where the surface roughness of the active material layer is precisely controlled to prevent variations in solid electrolyte thickness. This ensures uniform solid electrolyte thickness and optimal interface resistance between the active material and electrolyte layers.

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A novel process for preparing ultra-low temperature lithium iron phosphate batteries that improves dispersion of lithium iron phosphate nanoparticles. The process involves a single-step dispersion of lithium iron phosphate nanoparticles in a conductive agent slurry using a high-speed mixing system, followed by controlled addition of a dispersant and electrolyte. The dispersion process achieves uniform particle distribution without the need for multiple stages of grinding or mechanical mixing, resulting in improved battery performance at low temperatures.

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All-solid-state battery with improved performance through direct pressure application from the lid to the closed portion of the exterior. The battery cell is housed in a tubular portion with a sealed end, and a lid seals the other end. The lid is pressurized in the axial direction of the tubular portion, applying pressure to the closed portion through the battery cell. This direct pressure application reduces internal resistance and enhances battery performance compared to conventional liquid electrolyte batteries.

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Solid lithium secondary battery that suppresses short-circuiting during charging through optimized anode current collector surface conditions. The battery features a solid electrolyte layer with a controlled surface roughness that matches the anode current collector's surface characteristics. This matching surface interaction enables uniform Li migration from the cathode to the anode current collector during charging, preventing dendrite formation. The battery's anode current collector surface is engineered to have a surface roughness of 1.8-2.5 μm, which is significantly lower than conventional conditions. This surface condition enables efficient Li precipitation on the anode current collector during charging, while maintaining uniform contact between the anode current collector and solid electrolyte layer.

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A lithium-ion battery design that prevents dendrite growth during charging by creating a barrier between the negative electrode current collector and the solid electrolyte layer. The barrier is achieved through a specific configuration where the outer periphery of the negative electrode current collector is separated from the solid electrolyte layer by a distance of at least 300 microns. This separation prevents the formation of dendrites that can cause short circuits during charging. The design ensures that the negative electrode current collector remains within the solid electrolyte layer, while the electrolyte layer maintains its integrity.

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Non-aqueous electrolyte secondary battery that enhances reliability and capacity through a unique electrode design. The battery features a negative electrode with a selectively reduced active material region in the tab region, where the active material layer transitions from the collector surface to the tab. This design creates a boundary between the tab and active material regions, preventing lithium migration and dendrite formation during charging. The separator maintains electrical isolation between the tab and active material layers. The tab region's reduced active material coverage reduces lithium diffusion and surface conductivity issues typically associated with lithium-ion battery electrodes.

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A solid electrolyte for all-solid batteries that addresses common issues associated with traditional liquid electrolyte systems. The solid electrolyte comprises a copper sulphide layer that forms a protective oxide layer on the electrode surface during manufacturing, preventing corrosion and degradation. This layer also enhances the solid-state battery's mechanical properties by improving electrode surface roughness and reducing stress concentrations. The copper sulphide layer can be formed through controlled oxidation of copper substrates in alkaline solutions, ensuring uniform deposition and adhesion. This approach enables the creation of all-solid batteries with improved safety, stability, and reliability compared to conventional liquid electrolyte systems.

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Three-dimensional porous current collector for lithium-ion batteries that prevents dendritic crystal growth through controlled current flow through a porous structure. The collector's three-dimensional architecture channels current while maintaining a uniform thickness, preventing the formation of long, branching crystal structures that can cause internal short circuits and reduce battery lifespan.

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A method for manufacturing solid lithium-ion batteries with enhanced performance characteristics. The method involves depositing a precursor layer on the cathode surface before forming the battery's body, followed by a secondary solution deposition. The precursor layer contains a high-capacity solid electrolyte, while the secondary solution in the body layer incorporates a conductive material like lithium ion conductive oxide or phosphoric acid compound. The battery achieves superior high-rate discharge performance and circulation characteristics through this layered approach.

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All-solid-state battery with enhanced safety and performance through a novel solid electrolyte design. The battery incorporates a single solid electrolyte layer containing both a sulfide-based solid electrolyte and a different sulfide-based solid electrolyte, which enables improved safety through reduced interface risks between the solid electrolyte and electrodes. The solid electrolyte layer is prepared through a specific binder-assisted process, allowing for efficient integration of the solid electrolyte components. The battery's structure is achieved by stacking the positive electrode, solid electrolyte layer, and negative electrode, with the solid electrolyte layer positioned between the electrodes.

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A method for forming a solid-state battery positive electrode that enhances its performance through the incorporation of a fluorinated polymer slurry. The slurry contains a copolymer with vinylidene fluoride monomers and a dispersion medium, where the vinylidene fluoride content is optimized to achieve a specific ratio of 40-70 mol%. This polymer-based slurry is applied to the electrode surface, where it forms a uniform layer upon drying. The resulting electrode exhibits improved electrical conductivity, mechanical stability, and chemical durability compared to conventional electrode materials.

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