A method for embedding sulphur into conductive carbon is provided. Elemental sulphur is dissolved in liquid ammonia to form a sulphur-ammonia solution. Conductive carbon is soaked in the sulphur-ammonia solution to embed the conductive carbon with the dissolved sulphur. The liquid ammonia in the sulphur-ammonia solution can be removed as gaseous ammonia to yield sulphur-embedded conductive carbon. The sulphur-embedded conductive carbon can be used to manufacture sulphur cathodes. Such sulphur cathodes and batteries incorporating such sulphur cathodes are provided.

The present invention relates to an all-solid-state battery including: an electrode assembly including a negative electrode, a positive electrode, and a solid electrolyte between the negative electrode and the positive electrode; and a case for accommodating the electrode assembly, wherein the negative electrode includes a negative electrode current collector and a negative electrode active material layer including a negative electrode active material and a binder, the negative electrode active material includes a carbon-based material and metal particles, the binder includes a first polymer of a butadiene rubber, and a second polymer selected from carboxy alkyl cellulose (wherein alkyl is a C1 to C6 alkyl), a salt thereof, and a combination thereof, and the first polymer and the second polymer are included in a weight ratio of 1:1 to 6:1.

The present invention relates to an electrode active material, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active material includes: a core and a coating layer, where the core includes a ternary material, the coating layer coats the core, the coating layer includes a reaction product of a sulfur-containing compound and a lithium-containing compound, and the reaction product includes element Li, element S, and element O.

A secondary battery includes a positive electrode, a negative electrode including a negative electrode active material, and an electrolytic solution. The negative electrode active material includes a lithium-silicon-containing oxide that includes lithium and silicon as constituent elements and includes magnesium present on a surface layer of the lithium-silicon-containing oxide. The lithium-silicon-containing oxide includes a phase including silicon and a phase including at least one kind of lithium silicate represented by Formula (1). A range in which magnesium is present is within a range of greater than or equal to 10 nm and less than or equal to 3000 nm from a surface of the lithium-silicon-containing oxide in a depth direction. Magnesium forms at least one kind of magnesium silicate represented by Formula (2). A ratio of a number of moles of magnesium to a number of moles of lithium is greater than or equal to 0.1 mol % and less than or equal to 20 mol %,

Li.sub.aSi.sub.bO.sub.c  (1) where a, b, and c satisfy 1≤a≤6, 1≤b≤3, and 1≤c≤7, respectively,

Mg.sub.xSi.sub.yO.sub.z  (2) where x, y, and z satisfy 1≤x≤3, 1≤y≤2, and 1≤z≤4, respectively.

A positive electrode plate for secondary battery, a secondary battery, a battery module, a battery pack, and an apparatus are provided. Some embodiments provide a positive electrode plate for secondary battery, where the positive electrode plate includes a positive electrode current collector and a positive electrode active substance layer located on a surface of the positive electrode current collector, the positive electrode active substance layer includes a positive electrode active substance, the positive electrode active substance contains a first lithium-nickel transition metal oxide and a second lithium-nickel transition metal oxide, the first lithium-nickel transition metal oxide contains a first matrix and a first coating layer located on a surface of the first matrix, the first matrix is secondary particles, and the second lithium-nickel transition metal oxide is single crystal particles or particles with quasi-single crystal morphology.

A battery includes a power generation element including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer located between and in contact with both the positive electrode layer and the negative electrode layer, an outer body accommodating the power generation element, and an adhesive body located between and in contact with both a main surface of the power generation element and the outer body.

The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The positive electrode includes a positive electrode collector with a thermal conductive rate of 65 W/(m.Math.K) to 150 W/(m.Math.K). The negative electrode includes a negative electrode active material layer including a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.

In this disclosure, a battery is provided. The electrode includes an electrode current collector and an electrode active material layer, wherein the electrode active material layer includes a single crystal electrode active material and a polycrystalline electrode active material, and the single crystal electrode active material and the polycrystalline electrode active material are each a lithium transition metal composite oxide, and the electrode active material layer includes a first layer including a first surface opposite to the electrode current collector and a second layer including a second surface on the electrode current collector side, wherein the first layer includes the single crystal electrode active material as a main component of the electrode active material, and the second layer includes the polycrystalline electrode active material as a main component of the electrode active material.

Solvent-free methods of making a component, like an electrode, for an electrochemical cell are provided. A particle mixture is processed in a dry-coating device having a rotatable vessel defining a cavity with a rotor. The rotatable vessel is rotated at a first speed in a first direction and the rotor at a second speed in a second opposite direction. The particle mixture includes first inorganic particles (e.g., electroactive particles), second inorganic particles (e.g., ceramic HF scavenging particles), and third particles (e.g., electrically conductive carbon-containing particles). The dry coating creates coated particles each having a surface coating (including second inorganic particles and third particles) disposed over a core region (the first inorganic particle). The coated particles are mixed with polymeric particles in a planetary and centrifugal mixer that rotates about a first axis and revolves about a second axis. The polymeric particles surround each of the plurality of coated particles.

A method of preparing an electrochemical electrode which is partially or totally covered with a film that is obtained by spreading an aqueous solution comprising a water-soluble binder over the electrode and subsequently drying same. The production cost of the electrodes thus obtained is reduced and the surface porosity thereof is associated with desirable resistance values.