Controlling Dendrite Propagation 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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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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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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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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A solid electrolyte for lithium-ion batteries that prevents dendritic crystal growth through electrode interface resistance. The electrolyte is formed by sintering a compact oxide material with high density (>90% of the original material), which creates a solid electrolyte with controlled porosity. The compact material is shaped into a specific form with strategically placed air holes, creating a gradient of porosity across the electrolyte surface. This gradient enhances ion conductivity while preventing electrode-electrolyte interface resistance. The compact material is then integrated into the battery cell configuration, with the electrolyte filling the gap between the electrodes.

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