Dendrite Suppression in Solid State Batteries

Polymer/ceramic composite electrolyte for lithium carbonate (Li-CO2) batteries, comprising PVDF, PEO, and ceramic fillers like Zn-doped LATP. The composite electrolyte combines the advantages of solid-state batteries with the benefits of ceramic fillers, offering improved interface contact and enhanced ion mobility compared to traditional organic electrolytes. The composite electrolyte's crystallinity and phase behavior are tailored through the addition of ceramic fillers, which inhibit crystallization and chain arrangement of the polymer matrix, respectively. This results in a superior solid-state electrolyte that enhances battery performance and safety.

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A lithium metal solid-state battery that addresses the safety and stability issues of lithium metal batteries through enhanced interface contact and dendrite control. The battery employs a novel solid electrolyte membrane that combines lithium metal deposition with a protective coating layer, improving solid-solid contact while preventing lithium dendrite growth. This membrane enables controlled lithium deposition, maintains interface integrity, and prevents side reactions between lithium metal and active fillers. The battery design combines metallic lithium electrodes with a composite solid electrolyte membrane, providing a stable and efficient lithium metal battery solution.

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Solid electrolyte module for preventing short circuits and improving cycle stability in solid-state lithium batteries. The module has a sandwich structure with two lithium-rich solid electrolyte layers and a lithium-poor intermediate layer. The lithium-poor layer reduces lithium sources for dendrite growth compared to the lithium-rich layers. This inhibits dendrite penetration through the electrolyte stack and prevents short circuits. The module is prepared by coating polymer-based solid electrolytes with varying lithium concentrations onto substrates.

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A composite solid electrolyte material for lithium secondary batteries that eliminates lithium dendrite growth through a solid-state approach. The material comprises a solid electrolyte sheet comprising a polymer-clad inorganic solid electrolyte particle matrix. The inorganic particles are coated with an insulating polymer layer that prevents lithium ion migration through the solid electrolyte interface. The coated particles are then pressed into a uniform sheet, eliminating the interface between the solid electrolyte and metal anode. This solid-state design prevents lithium dendrite growth by preventing lithium ions from reaching the anode interface.

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Solid electrolyte layer for preventing dendrite growth in all-solid-state batteries by combining an inorganic solid electrolyte with a heat-resistant resin. The layer is formed between a positive electrode and a negative electrode, with the inorganic solid electrolyte providing the electrolyte pathway while the heat-resistant resin prevents dendrite formation through its thermal stability. This configuration enables stable operation of all-solid-state batteries without the need for separate solid electrolyte layers, while maintaining the safety benefits of solid electrolytes.

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A high-performance all-solid-state battery with enhanced stability and performance through a novel double-layer electrolyte configuration. The battery employs a lithium-silicon alloy negative electrode, a ternary material composite positive electrode, and a sulfide solid electrolyte with a double-layer structure between the electrodes. The double-layer electrolyte combines the benefits of sulfide solid-state electrolytes with the advantages of lithium-silicon alloy electrodes, providing superior interface stability and conductivity.

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Negative electrode current collector for lithium-free batteries that enables high-density lithium deposition through a novel metal layer structure. The collector comprises a metal substrate, a conductive layer, and a metal layer with grain boundaries. The metal layer, comprising a metal powder, wire, or mixed layer, is formed on the conductive layer and provides a conductive pathway for lithium deposition. This unique structure enables controlled lithium deposition through controlled grain boundary formation, overcoming the limitations of traditional metal current collectors.

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Solid-state lithium-ion battery that enhances safety and performance through a novel polymer electrolyte. The battery incorporates a polymer electrolyte that contains a specific additive to specifically inhibit lithium dendrite growth while maintaining high ion conductivity. The additive enhances interface resistance between the electrolyte and electrodes, while maintaining sufficient conductivity for safe operation. The polymer electrolyte maintains its integrity despite lithium metal anode defects and unevenness, ensuring consistent performance and cycle life.

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Solid electrolyte for lithium-ion batteries that overcomes conventional limitations of organic liquid electrolytes. The electrolyte combines a high-performance inorganic solid electrolyte with a polymer solid electrolyte, where the polymer solid electrolyte incorporates lithium salt and polymer matrix. This dual-component system achieves high ionic conductivity, wide operating voltage window, and enhanced mechanical strength, while eliminating the interface resistance and leakage issues associated with traditional solid electrolytes.

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A cyclic carbonate-based polymer electrolyte for solid-state lithium batteries with enhanced electrochemical performance. The electrolyte comprises a cyclic carbonate-based polymer backbone containing ethylene carbonate and urethane units, achieved through in-situ polymerization of cyclic carbonate monomers or comonomers with organic plasticizers, lithium salts, and initiators. This polymer exhibits superior voltage stability, high lithium ion conductivity, and mechanical properties, making it suitable for solid-state lithium batteries that can prevent lithium dendrite formation and improve interface stability.

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A two-layer polymer electrolyte for solid-state lithium batteries that enables high energy density while maintaining stability. The electrolyte consists of a solid polymer electrolyte (PPE) with a high redox potential that is electrochemically stable to the positive electrode, and a second solid polymer electrolyte (PPE2) with a lower redox potential that is electrochemically stable to the negative electrode. The PPE2 layer is positioned between the positive and negative electrodes, with the PPE layer in contact with the positive electrode and the PPE2 layer in contact with the negative electrode. This configuration provides a stable interface between the solid electrolyte and the electrodes, enabling the battery to achieve high energy density while maintaining electrochemical stability.

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A method for preparing all-solid-state lithium-ion battery electrodes through a novel solid-state electrolyte synthesis process. The method involves synthesizing the solid electrolyte directly on the electrode surface using a liquid phase method, followed by rapid cooling and controlled temperature reduction. This approach enables the creation of solid-state electrolytes with improved thermal stability and conductivity compared to traditional liquid-state electrolytes. The electrode active materials, such as lithium titanate, cobalt, and iron phosphate, are combined with conductive agents and partially doped with dopants to enhance their performance in the solid-state environment.

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Non-negative secondary lithium battery featuring a liquid electrolyte system that prevents lithium dendrite formation through an integrated metal barrier layer. The battery comprises a lithium-cathode material, separator, liquid electrolyte, positive current collector, and negative electrode. A seed layer is deposited on the negative electrode surface before current collection, followed by the electrolyte containing non-lithium metal ions. The seed layer acts as a protective barrier against lithium migration and dendrite growth, ensuring stable operation at high current densities.

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A gel composite positive electrode for lithium-ion batteries that overcomes interface resistance issues in solid-state batteries. The electrode comprises a lithium cobalt oxide or other lithium metal positive electrode, a conductive carbon-based active material, and a polyvinylidene fluoride-based adhesive. The active material is combined with a conductive agent and mixed with the adhesive to form a slurry. The slurry is then applied to a current collector surface and dried to form a positive electrode sheet. The sheet is then immersed in a gel electrolyte and processed to create a solid-state battery.

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Quasi-solid electrolyte for lithium batteries that overcomes the challenges of liquid electrolyte leakage in solid-state batteries. The electrolyte is prepared by dissolving lithium salts in a butyl ionic liquid, followed by the addition of cross-linking agents to form a solid electrolyte. The cross-linking process creates a quasi-solid electrolyte that maintains its electrochemical properties while preventing the formation of lithium dendrites during charge-discharge cycles.

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Lithium-ion battery positive electrode tab with enhanced stability and safety features. The tab incorporates a novel passivation layer on the electrode surface that prevents degradation from moisture and air exposure. This layer is formed through controlled reduction of metal particles, ensuring their stability while maintaining high lithium activity. The passivation layer is generated through controlled oxidation reactions, enabling the production of stable oxide layers on the electrode surface. This approach enables the creation of high-performance lithium-ion battery electrodes with improved safety and durability characteristics.

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A composite solid electrolyte for lithium-ion batteries that combines the benefits of inorganic oxide electrolytes with enhanced stability and interface properties. The composite electrolyte is prepared by modifying an inorganic oxide electrolyte with a polymer electrolyte, followed by a controlled drying process. This approach enables the creation of a stable interface between the electrolyte and metal lithium, while maintaining the electrolyte's conductivity properties. The composite electrolyte is then formed into a ceramic or glass-ceramic sheet for use in solid-state batteries.

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Polymer electrolyte for lithium-ion batteries with enhanced performance characteristics. The electrolyte comprises a lithium salt of a fluoroalkoxy trifluoroborate, a polycarbonate-based polymer, a porous support material with a thickness of 20-100 microns, and an ionic conductivity of 10^-9 S/cm at room temperature. The electrolyte achieves high ionic conductivity, wide electrochemical window, and excellent temperature stability, while maintaining superior cycle life and capacity retention compared to conventional polymer electrolytes.

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All-solid-state lithium-ion battery with enhanced performance through improved electrolyte design. The battery comprises a negative electrode sheet and a positive electrode sheet, with a polymer electrolyte layer between them. The negative electrode sheet features a copper current collector, a conductive agent layer, and a sulfide electrolyte layer. This architecture eliminates the interface impedance typically associated with solid-state electrolyte interfaces, while maintaining the benefits of solid-state technology. The polymer electrolyte layer enables high ionic conductivity, while the conductive agent layer enhances charge transport. The copper current collector and sulfide electrolyte layer provide mechanical stability and electrical conductivity.

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Composite solid-state polymer electrolyte for lithium-ion batteries featuring enhanced ionic conductivity, electrochemical stability, and mechanical strength. The electrolyte combines an ethylenic ester-based monomer with a lithium salt, an initiator, and a porous substrate. The lithium salt enhances lithium ion movement while the monomer and initiator improve electrolyte properties. The composite material achieves superior performance compared to conventional solid-state electrolytes, particularly in high-temperature applications.

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