There is provided an all-solid-state battery including a positive electrode, a solid electrolyte layer, and a negative electrode, wherein the positive electrode contains a positive electrode active material, and the positive electrode active material has an O2 type structure and contains at least Li, Mn, Ni and O as constituent elements.

A particulate or multiple particulates of an anode active material, the particulate comprising one or more surface-stabilized particles of the anode active material wherein each of the surface-stabilized particles comprises a core anode material particle encapsulated by a first encapsulating shell comprising a surface-stabilizing material and wherein the one or more surface-stabilized particles are encapsulated by a second encapsulating shell comprising an elastic polymer having a thickness from 1 nm to 10 μm, a fully recoverable tensile strain from 2% to 800% when measured without an additive or reinforcement material dispersed therein, and a lithium ion conductivity from 10.sup.−8 S/cm to 5×10.sup.−2 S/cm when measured at room temperature. Also provided are an anode and a lithium battery containing a plurality of such particulates as an anode material or as a prelithiation agent to compensate for active lithium loss in the anode.

A solid electrolyte including: a lithium ion inorganic conductive layer; and an amorphous phase on a surface of the lithium ion inorganic conductive layer, wherein the amorphous phase is an irradiation product of the lithium ion inorganic conductive layer. Also, the method of preparing the same, and a lithium battery including the solid electrolyte.

The present disclosure generally relate to separators, high performance electrochemical devices, such as, batteries and capacitors, including the aforementioned separators, and methods for fabricating the same. In one implementation, a separator for a battery is provided. The separator comprises a substrate capable of conducting ions and at least one dielectric layer capable of conducting ions. The at least one dielectric layer at least partially covers the substrate and has a thickness of 1 nanometer to 2,000 nanometers.

A solid-state ion conductor includes a compound of Formula 1:

Li.sub.6+(5−a)x−b*y−z−(c+2)wA.sub.1−x(M1).sup.a.sub.x(M2).sup.b.sub.yO.sub.5−z−wX.sub.l+zQ.sup.c.sub.w   Formula 1

wherein, in Formula 1, A is an element having an oxidation state of +5, M1 is an element having an oxidation state of a, wherein a is +2, +3, +4, +6, +7, or a combination thereof, M2 is an element having an oxidation state of b, wherein b is +1, +2, or a combination thereof, X is an element having an oxidation state of −1, Q is an element having an oxidation state of c, wherein c is less than −2, and wherein −2≤(5−a)x−b*y−z−(c+2)w≤2, 0≤x≤0.5, 0≤y≤0.5, −1≤z≤1, 0≤0.5

Provided are an all-solid secondary battery and a method of manufacturing the same, the all-solid secondary battery including: an anode layer; a cathode layer; and a solid electrolyte layer between the anode layer and the cathode layer, wherein the cathode layer contains a large-particle cathode active material, a small-diameter cathode active material, and a solid electrolyte, the solid electrolyte layer includes a first solid electrolyte layer adjacent to the cathode layer and containing a first solid electrolyte, and a second solid electrolyte layer adjacent to the anode layer and containing a second electrolyte, the second solid electrolyte has a larger size than the solid electrolyte of the cathode layer or the first solid electrolyte, and the second solid electrolyte has higher ion conductivity than the first solid electrolyte.

A disclosed battery may include an anode, a polymeric network disposed over one or more exposed surfaces of the anode, a cathode positioned opposite to the anode, an electrolyte at least partially dispersed throughout the cathode, and a separator. The anode may include an alkali metal that can release alkali ions during operational discharge-charge cycling of the battery. The polymeric network may include carbonaceous materials grafted with fluorinated polymer chains cross-linked with each other. The fluorinated polymer chains may produce an alkali-metal containing fluoride in response to operational cycling of the battery. Formation of the alkali-metal containing fluoride may suppress alkali metal dendrite formation from the anode such that lithium is consumed to form lithium fluoride rather than forming lithium-containing dendritic structures. The separator may be positioned between the anode and the cathode.

The invention discloses an active material ball composite layer. The active material ball composite layer includes a plurality of active material balls and an outer binder. The active material ball include a plurality of active material particles and a first conductive material. An inner binder is used to adhere the active material particles and the first conductive material to form the active material balls. Then, the outer binder is used to adhere the active material balls to form the composite layer. The elasticity of the inner binder is smaller than the elasticity of the outer binder. Therefore, the scale of expansion of the active material particles is efficiently controlled during charging and discharging. The unrecoverable voids would be reduced or avoided.

An all-solid secondary battery, including: a cathode; an anode; and a solid electrolyte layer disposed between the cathode and the anode, wherein the anode comprises an anode current collector; a first anode active material layer in contact with the anode current collector and comprising a first metal; a second anode active material layer disposed between the first anode active material layer and the solid electrolyte layer and comprising a carbon-containing active material; and a contact layer between the second anode active material layer and the solid electrolyte layer, and disposed such that the contact layer prevents contact between the second anode active material layer and the solid electrolyte layer, wherein the contact layer comprises a second metal, and has a thickness less than a thickness of the first anode active material layer.

A lithium-sulfur battery which is capable of achieving high discharge capacity of sulfur (S) with a small amount of a positive electrode material is provided. The lithium-sulfur battery reduces cost for manufacturing a positive electrode due to the use of a dry manufacturing method including compressing a positive electrode active material powder into a predetermined shape without preparing a slurry for an electrode active material layer in the manufacture of the positive electrode. Using a multi-layered separator, the lithium-sulfur battery is capable of solving the nonuniform reactivity problem of the positive electrode manufactured by the dry manufacturing method.