Improving Anode Collector Durability in Lithium-Ion Batteries

Lithium metal battery with modified anode current collector to suppress dendrite formation and improve battery performance. The modification is a thin film of metal directly applied to the anode current collector. This metal layer promotes dense and uniform lithium deposition during charging, preventing dendrites. The thin film metal has a low formation energy with lithium (≤0.0123 eV) and low overpotential (≤5 mV) for dense, homogeneous lithium plating without dendrites.

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An anode current collector for all-solid-state batteries that prevents lithium dendrites during charging and discharging. The anode current collector has two coatings on the surface that contact the solid electrolyte layer. The first coating is a lithiophilic metal layer that attracts lithium ions. The second coating has less electronic conductivity than the first coating. This prevents electrons from moving into the solid electrolyte layer, preventing dendrite formation.

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An anode current collector for all-solid-state batteries that enables uniform lithium plating without dendrite formation. The anode has a unique double coating structure. The outer coating has reduced electrical conductivity compared to the inner coating. The inner coating contains a lithiophilic metal that attracts lithium ions. The outer coating prevents electrons from moving into the solid electrolyte layer, preventing short circuits and efficiency loss. The double coating allows lithium plating on the anode while preventing electron migration into the electrolyte.

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An anode for an all-solid-state battery with improved lithium intercalation/deintercalation properties. The anode has an anode active material containing a carbon-based material, and a deposition layer of a metal that forms an alloy with lithium on the surface of the carbon-based material. This layer allows better lithium transport between the electrolyte and the carbon-based material compared to pure carbon. The alloy formed by the metal and lithium is stable at battery operating conditions. The alloying metal coating on the carbon improves lithium intercalation/deintercalation efficiency, especially at low temperatures where lithium movement is limited.

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Lithium metal battery with anode-free current collector using lithium alloys to improve specific energy and cycle life compared to copper current collectors. The lithium alloys, like lithium-zinc or lithium-silicon, have better lithium nucleation and diffusion properties compared to transition metals like copper. Using lithium alloys as anode-free current collectors reduces dendrite formation, improves Coulombic efficiency, and allows higher charge rates without sacrificing specific energy. The lithium alloys provide near-zero lithium adsorption energies on the surface, unlike transition metals, which helps prevent overbinding and overpotentials.

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Anode-free lithium metal batteries with higher energy density than prior art anode-free batteries by using specific lithium alloys as current collectors. The lithium alloys have better lithium nucleation and diffusion compared to traditional copper current collectors. This reduces dendrite growth, improves cycle life, and enables higher charging rates. The lithium alloys considered include lithium-zinc, lithium-aluminum, lithium-boron, lithium-silicon, lithium-lead, lithium-silver, lithium-germanium, lithium-selenium, lithium-tellurium, lithium-arsenic, lithium-antimony, lithium-bismuth, lithium-indium, and lithium-gallium

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Anode material for lithium-ion batteries with improved cycle life by using aluminum alloys with low corrosion rates. The aluminum alloy used as the anode active material has an average corrosion rate of less than 0.20 mm/year when immersed in a specific solution. The low corrosion rate prevents significant capacity loss during cycling compared to conventional aluminum anodes. The alloy composition and processing to achieve the low corrosion rate are not specified.

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A method for drying electrode assemblies of lithium-ion batteries to achieve low moisture contents that improve battery performance and cycle life. The method involves gradually drying the electrode assembly in two or more steps at decreasing temperatures to prevent rapid moisture loss. This prevents non-uniform drying and shrinkage that can reduce electrode adhesion. The two-step drying allows lower temperatures in the first step to prevent rapid moisture loss, preventing non-uniform drying and shrinkage. The two-step drying also allows lower temperatures in the first step to prevent rapid moisture loss, preventing non-uniform drying and shrinkage that can reduce electrode adhesion.

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A low-cost, safe, reliable, and high-performance battery design using aqueous electrolytes. The battery has a cathode with reversible intercalating/deintercalating ions, anode with intercalating/deintercalating ions, and aqueous electrolyte with dissolved active ions. During discharge, intercalation ions leave the cathode and reduce in the electrolyte, while anode ions oxidize and leave. During charge, intercalation ions enter the cathode, anode ions are reduced, and active ions leave the electrolyte. This allows avoiding flammable organic solvents and volatile organic compounds (VOCs) while reducing cost and improving safety. The battery uses water-based electrolytes, metal or metal oxide cathode current collectors, and passivated stainless steel

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A battery with improved cycle life and reduced dendrite growth at the anode, particularly for aqueous secondary batteries like zinc-ion batteries. The battery uses a modified lithium manganese oxide cathode, an aqueous electrolyte, and a lead-containing coating on the anode. The modified cathode material, with lead substitution, inhibits dendrite growth. The lead-containing coating on the anode further suppresses dendrite formation. The lead concentration is less than 1000 ppm. This prevents dendrites while maintaining battery performance.

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A secondary battery cell, stacked battery, and battery assembly design to prevent local degradation in stacked battery packs. The cell has a collector electrode adjacent to the cathode or anode with a terminal portion that protrudes from the end. The terminal has a larger current path width further from the contact area compared to the closest path. This avoids current concentration at the contact area and spreads it out to prevent localized heating and degradation. In stacked cells, the collector connects adjacent cells with a separate terminal. In the assembly, stacked cells alternate cathode/anode facing. This distributes current paths between cells and prevents concentration.

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Non-aqueous secondary battery with improved long-term reliability and durability by using a specific type of current collector material. The battery has a positive electrode, negative electrode, and electrolyte sandwiched between them. The current collector on the positive side is made of a specific alloy-based metal foil, like stainless steel, with a formula index of at least 45. This improves the heat resistance and prevents issues like pinhole formation and electrolyte leakage during cycling that can cause short circuits.

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Negative electrode for lithium-ion batteries that has improved corrosion resistance and prevents copper plating during charging without sacrificing electrical conductivity. The negative electrode has a copper current collector covered with a nickel layer on at least one surface. The nickel layer provides corrosion resistance to the electrolyte without degrading the copper's electrical properties. This prevents copper elution into the electrolyte and internal short circuits, as well as delamination of the active material from the copper. The method involves plating a nickel layer onto the copper current collector before forming the active layer.

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