A doped phosphorus-sulfur iodide solid electrolyte, a preparation method therefor, and use thereof. The chemical formula of said solid electrolyte is Li.sub.6-xM.sub.xP.sub.1-xS.sub.5I, in which 0<x<0.8, and M is tungsten and/or molybdenum. Said method comprises: 1) mixing a lithium source, a phosphorus source, an iodine source, a sulfur source, and an M source in an inert atmosphere, and then ball-milling same to obtain a solid electrolyte precursor; and 2) sintering the solid electrolyte precursor obtained in step 1) in an inert atmosphere or in vacuum to obtain the doped phosphorus-sulfur iodide solid electrolyte.

A sodium nickel chloride battery for high-performance batteries of electric vehicles and other demanding stationary applications. The battery which permits a current collector with a maximum surface-to-cross-section ratio and simple manufacture thereof as well as simplified electrode filling of the battery includes a cathode-side metallic current collector elongated in a cathode chamber about a central axis that is made of a metal tube with high electrical conductivity and has, in a part of the current collector immersed in a separator, a formed tube section, provided with elements for increasing the surface area of the current collector, and has, at a transition from an unpressed tube section as a filler tube to a pressed tube section, a through-hole opening the filler tube to the outside, so that the filler tube can be used as a filling opening for the porous mixture of the cathode and the secondary electrolyte.

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.

A positive electrode material in one aspect of the present disclosure includes: a positive electrode active material; and a first solid electrolyte that covers the surface of the positive electrode active material. The first solid electrolyte contains Li, M1, O, and X1. M1 is at least one element selected from the group consisting of Nb and Ta. X1 is at least one element selected from the group consisting of Cl, Br, and I.

A producing method according to the present disclosure includes heat-treating a material mixture at higher than or equal to 150° C. and lower than or equal to 450° C., wherein the material mixture contains MX.sub.5 and at least one selected from the group consisting of Li.sub.2O.sub.2, Li.sub.2O, and LiOH, M is at least one selected from the group consisting of Ta and Nb, and X is at least one selected from the group consisting of Cl and Br.

A battery module of the present disclosure includes a battery case, at least one sulfide-based battery disposed inside the battery case, and at least one halogen-based battery disposed inside the battery case. A vehicle of the present disclosure includes the battery module and an electric motor configured to be driven by electric power supplied from the battery module. A method of manufacturing a battery module of the present disclosure includes disposing at least one sulfide-based battery inside the battery case and disposing at least one halogen-based battery inside the battery case.

A method for manufacturing an electrode for an all solid battery including the steps of coating a current collector with a slurry including an active material, a conductive material, and a polyimide-based binder; and melting a solid electrolyte having a melting temperature of 50° C. to 500° C. and applying it onto the coating layer and an electrode manufactured therefrom.

A process of synthesizing a solid state lithium ion conductor includes mechanically milling at least two precursors so as to form crystalline Li.sub.6MgBr.sub.8. For instance, the mechanical milling can be carried out using a planetary mill. Moreover, in a practical application, the precursors include LiBr and MgBr.sub.2.

The solid electrolyte material of the present disclosure includes Li, Ca, Y, Sm, X, O, and H, wherein, X is at least one selected from the group consisting of F, Cl, Br, and I; and the molar ratio of O to the sum of Y and Sm is greater than 0 and less than 0.32.