The invention relates to a positive plate for a lithium battery, preparation method thereof and use in semi-solid state battery. The positive plate for a lithium battery comprises a current collector and an active material layer arranged on a surface of the current collector; and the active material layer comprises a positive electrode active material, a conductive agent, a binder, an oxide solid-state electrolyte and a polymer obtained by in-situ polymerization. The oxide solid-state electrolyte and polymer are evenly distributed in the active material layer; wherein the oxide solid-state electrolyte can effectively improve the safety performance of the positive plate; and the polymer obtained by in situ polymerization can effectively improve the contact between the oxide solid-state electrolyte and the material in the positive plate, thereby reducing the impedance of the positive plate and improving the electrochemical performance of the positive plate. The combination of the oxide solid-state electrolyte and polymer in the present application enables the positive plate of the present application to possess excellent electrochemical performance, in addition to excellent safety performance.

Provides an aqueous binder composition for a secondary battery electrode, comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a), a structural unit (b), and a structural unit (c). The binder composition disclosed herein has improved binding capability. In addition, battery cells comprising electrodes prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.

An object of the present invention is to provide a lithium-ion secondary battery having a large charge and discharge capacity and excellent cycle characteristics irrespective of kind and shape of a current collector. The lithium-ion secondary battery comprises an electrode comprising a primer layer for protecting a current collector and a crosslinking agent layer comprising a compound being capable of crosslinking an aqueous binder contained in the primer layer, the both layers being disposed between a current collector and an active material layer comprising a sulfur-based active material.

An electrochemical apparatus formed by stacking and then winding a first separator, a negative electrode plate, a second separator, and a positive electrode plate. The negative electrode plate includes a negative electrode current collector, a first active material layer and a second active material layer. In a winding direction, a length of the first active material layer is greater than a length of the second active material layer. The first separator comprises a first substrate layer, a first coating layer and a second coating layer. The second separator comprises a second substrate layer, a third coating layer and a fourth coating layer. A bonding force between a first active material layer and a second coating layer is less than a bonding force between a second active material layer and a fourth coating layer.

Provided are an electrode sheet for an all-solid state secondary battery, an all-solid state secondary battery, a method of manufacturing an electrode sheet for an all-solid state secondary battery, and a method of manufacturing an all-solid state secondary battery. The electrode sheet for an all-solid state secondary battery includes a current collector, a primer layer, and an electrode active material layer in this order, in which the primer layer includes a binder (A), the electrode active material layer includes an inorganic solid electrolyte (B), an active material (C), and binder particles (D) having an average particle size of 1 nm to 10 μm and further includes the binder (A) on at least an adhesive interface side with the primer layer, and a crosslinked structure is not formed between the binder (A) and the inorganic solid electrolyte (B).

Provided are an electrode sheet for an all-solid state secondary battery and an all-solid state secondary battery including the electrode sheet. The electrode sheet includes a current collector, a primer layer, and an electrode active material layer in this order, in which the electrode active material layer includes an inorganic solid electrolyte having ion conductivity of a metal belonging to Group 1 or Group 2 in the periodic table, an active material, and a binder a1, the primer layer includes the binder a1 and a binder a2, and in a case where the primer layer is equally divided into six sub-layers in a thickness direction and the six sub-layers are set as a first sub-layer to a sixth sub-layer in order from the electrode active material layer side toward the current collector side, a relationship between a ratio B1 of a content of a1 to a total content of a1 and a2 in the first sub-layer and a ratio B6 of a content of a1 to a total content of a1 and a2 in the sixth sub-layer satisfies B1>B6.

Described herein are composite anode compositions comprising silicon for use in an electrochemical cell. The composite anode compositions described herein include silicon as an anode active material having a particle size, crystallite size, and surface area that provide desired electrochemical properties. Further provided herein are electrochemical cells comprising the anode compositions and methods of making the same.

An ultra-fast charging, high-capacity composite material for use with anodes in lithium-ion batteries including a phosphorene layer on a carbon-based negative electrode material. The carbon-based negative electrode material may be activated carbon, graphene, carbon nanotubes, or combinations thereof. The phosphorene layer includes a base layer of black phosphorus upon which is deposited activated carbon having a disclosed range of particle size and surface area. In a second embodiment, the negative electrode material is a composite of activated carbon and black carbon and includes a negative electrode current collector of copper foil. A slurry is made from a carbon-based conductive agent and a binder, and applied to both sides of the copper foil, then heated and compacted with a rolling machine. The anodes thus produced are used in making lithium-ion batteries, capacitors, etc.

What are provided are a positive electrode for a lithium-ion battery capable of suppressing the generation of carbon dioxide while increasing the battery capacity of the lithium-ion battery, a lithium-ion battery and a method for producing a positive electrode for a lithium-ion battery. A positive electrode for a lithium-ion battery having a positive electrode current collector and a positive electrode active material layer, in which the positive electrode active material layer has a positive electrode mixture containing the positive electrode active material, and the positive electrode mixture contains lithium carbonate in a range of 9% by mass or more and 20% by mass or less with respect of the total weight thereof.

Provided is an anode configured to increase the ion conductivity of an anode layer and suppress a decrease in the energy density of the anode layer. Disclosed is an anode, wherein the anode is an anode comprising an anode layer for all-solid-state batteries; wherein the anode layer comprises an anode active material, a solid electrolyte and an ionic liquid; wherein the anode layer comprises at least one Si-based material selected from the group consisting of elemental Si and Si alloy as the anode active material; and wherein the ionic liquid is a solvated ionic liquid containing, in molar ratio, 1.5 mol or more of lithium bis(fluorosulfonyl)imide with respect to 1 mol of tetraglyme, or the ionic liquid is a solvated ionic liquid containing, in molar ratio, 2.0 mol or more of lithium bis(trifluoromethanesulfonyl)imide with respect to 1 mol of tetraglyme.