The present disclosure relates to a method of manufacturing an anode active material for a lithium secondary battery, the method including: mixing earth graphite and pitch coke with each other; preparing a raw material by adding and mixing a binder to the mixture; performing heat treatment on the raw material; graphitizing the heat-treated mixture to obtain a core part; immersing the core part in a hard carbon coating solution; and drying the coating solution in which the core part is immersed to obtain an anode active material.

A binder composition for a non-aqueous secondary battery contains: a particulate polymer formed of a graft polymer that includes an acidic graft chain and that is obtained through a graft polymerization reaction of an acidic group-containing monomer and/or macromonomer with core particles containing a block copolymer that includes an aromatic vinyl block region formed of an aromatic vinyl monomer unit and an aliphatic conjugated diene block region formed of an aliphatic conjugated diene monomer unit; and an acidic group-containing water-soluble polymer that has a weight-average molecular weight of 200,000 or less.

An electrode plate includes a current collector, a first active substance layer, a second active substance layer, and an insulation layer. The current collector includes a first surface, the first active substance layer includes a first active substance, and the second active substance layer includes a second active substance. The first active substance layer is sandwiched between the current collector and the second active substance layer and covers a first portion of the first surface, the insulation layer covers a second portion of the first surface, and the first active substance layer and the insulation layer are stacked to form an overlapped portion in a length direction of the electrode plate. The current collector can be covered by a high-resistance layer, thereby improving safety performance of the electrochemical apparatus and the electronic apparatus.

An electrode plate includes a current collector, a first active substance layer, a second active substance layer, and an insulation layer. The current collector includes a first surface, the first active substance layer includes a first active substance, and the second active substance layer includes a second active substance. The first active substance layer is sandwiched between the current collector and the second active substance layer and covers a first portion of the first surface, the insulation layer covers a second portion of the first surface, and the first active substance layer and the insulation layer are stacked to form an overlapped portion in a length direction of the electrode plate. The current collector can be covered by a high-resistance layer, thereby improving safety performance of the electrochemical apparatus and the electronic apparatus.

A solid electrolyte material according to the present disclosure includes Li, DC, Y, Sm, and X. The DC is at least one selected from the group consisting of Mg, Ca, Sr, Ba, and Zn. The X is at least one selected from the group consisting of F, Cl, Br, and I. A battery according to the present disclosure includes a positive electrode, a negative electrode, and an electrolyte layer provided between the positive electrode and the negative electrode. At least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer includes the solid electrolyte material according to the present disclosure.

There is provided a sulfide solid electrolyte containing elemental lithium (Li), elemental phosphorus (P), elemental sulfur (S), and an elemental halogen (X). The mole ratio of the elemental lithium (Li) to the elemental phosphorus (P), Li/P, satisfies 3.7<Li/P<5.4. The mole ratio of the elemental sulfur (S) to the elemental phosphorus (P), S/P, satisfies 3.9<S/P<4.1. The mole ratio of the elemental halogen (X) to the elemental phosphorus (P), X/P, satisfies 0.7<X/P<2.4. The sulfide solid electrolyte includes a crystalline phase having an argyrodite-type crystal structure.

There is provided a sulfide solid electrolyte containing elemental lithium (Li), elemental phosphorus (P), elemental sulfur (S), and an elemental halogen (X). The mole ratio of the elemental lithium (Li) to the elemental phosphorus (P), Li/P, satisfies 3.7<Li/P<5.4. The mole ratio of the elemental sulfur (S) to the elemental phosphorus (P), S/P, satisfies 3.9<S/P<4.1. The mole ratio of the elemental halogen (X) to the elemental phosphorus (P), X/P, satisfies 0.7<X/P<2.4. The sulfide solid electrolyte includes a crystalline phase having an argyrodite-type crystal structure.

There is provided an inorganic solid electrolyte-containing inorganic solid electrolyte-containing composition, a dispersion medium, and a polymer binder, where a component constituting the polymer binder contains a soluble polymer having a combination of specific functional groups or partial structures. There are also provided a sheet for an all-solid state secondary battery and an all-solid state secondary battery, in which this inorganic solid electrolyte-containing composition is used, as well as manufacturing methods for a sheet for an all-solid state secondary battery, and an all-solid state secondary battery.

A negative electrode plate includes: a current collector; and a negative electrode framework located on the current collector, where the negative electrode framework includes at least a first negative electrode framework layer and a second negative electrode framework layer, the first negative electrode framework layer is located between the current collector and the second negative electrode framework layer, and a porosity of the first negative electrode framework layer is higher than a porosity of the second negative electrode framework layer. With this design, side reactions between lithium metal and an electrolyte can be reduced, formation of lithium dendrites can be inhibited, and drastic swelling and contraction of the negative electrode plate in volume due to intercalation and deintercalation of lithium ions can be greatly alleviated or even eliminated, thereby improving safety and stability of the electrochemical apparatus.

A negative electrode for lithium secondary batteries and a method of manufacturing the same are provided. The negative electrode includes a negative electrode current collector and a lithiophilic material formed on at least one surface of the negative electrode current collector, wherein the lithiophilic material is an oxidized product of a coating material coated on the negative electrode current collector and includes at least one of a metal or a metal oxide, and an oxide layer is formed on a surface of the negative electrode current collector having the lithiophilic material formed thereon.