This invention relates to a method for preparing a lithium activated alumina intercalate solid by contacting a three-dimensional activated alumina with a lithium salt under conditions sufficient to infuse lithium salts into activated alumina for the selective extraction and recovery of lithium from lithium containing solutions, including brines.

The present invention provides a method for producing a solution of nanosheets, comprising the step of contacting an intercalated layered material with a polar aprotic solvent to produce a solution of nanosheets, wherein the intercalated layered material is prepared from a layered material selected from the group consisting of a transition metal dichalcogenide, a transition metal monochalcogenide, a transition metal trichalcogenide, a transition metal oxide, a metal halide, an oxychalcogenide, an oxypnictide, an oxyhalide of a transition metal, a trioxide, a perovskite, a niobate, a ruthenate, a layered III-VI semiconductor, black phosphorous and a V-VI layered compound. The invention also provides a solution of nanosheets and a plated material formed from nanosheets.

A lithium-supplementing additive, a preparation method therefor and application thereof. The lithium-supplementing additive includes a core body and a functional encapsulation layer coated on the core body, and the core body includes a lithium-supplementing material. Lithium carbonate is dispersed in the interface between the functional encapsulation layer and the core body or/and in the functional encapsulation layer. In the lithium-supplementing additive of the present application, the lithium carbonate dispersed in the interface between the functional encapsulation layer and the core body or/and in the functional encapsulation layer has a synergistic effect with the functional encapsulation layer, and can effectively improve the effect of the functional encapsulation layer on the core body, so that the core body is isolated from ambient moisture and CO.sub.2 to ensure the stability of the core body, thereby ensuring the effect and stability of lithium supplementation of the lithium-supplementing additive.

A silicon-based negative electrode composite material. Zinc and tin are doped in a silicon-based negative electrode material. The presence of a tin and zinc alloy improves the conductivity of the silicon-based material, and a coated carbon shell has pores, facilitating the infiltration of an electrolyte while improving the ionic conductivity and electronic conductivity of the material, so that the rate performance of the composite material is enhanced.

A negative active material for a rechargeable lithium battery, the negative active material including a porous amorphous carbon matrix having a porosity of about 10% to about 64%, silicon oxide distributed in pores of the porous amorphous carbon matrix, and a coating layer on a surface of the porous carbon matrix, the coating layer including an amorphous carbon.

This application relates to a positive active material, a method for preparing same, an electrode plate, a secondary battery, and an electrical device. The positive active material includes: a core material, including a lithium-rich manganese-based positive electrode material; and a cladding layer, covering an outer surface of the core material, where the cladding layer includes an oxygen-ion conductor and a lithium-ion conductor.

The present disclosure relates to a negative electrode material and a preparation method thereof and a lithium ion battery, wherein the negative electrode material includes an active material, the active material includes a skeleton structure and a silicon oxygen material embedded on the skeleton structure; the skeleton structure includes a skeleton of lithium silicate located inside the active material and a skeleton of water-insoluble silicate located on a surface layer of the active material, and the skeleton of water-insoluble silicate is linked with the skeleton of lithium silicate, wherein in an XRD pattern of the negative electrode material, an intensity of a strongest diffraction characteristic peak of the lithium silicate is I.sub.A, and an intensity of a strongest diffraction characteristic peak of the water-insoluble silicate is I.sub.B, and 0.03?I.sub.B/I.sub.A?0.2.

The present disclosure sets forth battery components for secondary and/or traction batteries. Described herein are new solid-state lithium (Li) conducting electrolytes including monolithic, single layer, and bi-layer solid-state sulfide-based lithium ion (Li.sup.30 ) conducting catholytes or electrolytes. These solid-state ion conductors have particular chemical compositions which are arranged and/or bonded through both crystalline and amorphous bonds. Also provided herein are methods of making these solid-state sulfide-based lithium ion conductors including new annealing methods. These ion conductors are useful, for example, as membrane separators in rechargeable batteries.

A conductive two-dimensional particle that includes: a plurality of layered materials each having one layer or plural layers, the one layer or plural layers including a layer body represented by: M.sub.mX.sub.n, wherein M is at least one metal of Group 3-7, X is a carbon atom, a nitrogen atom, or a combination thereof, n is 1 to 4, m is more than n and 5 or less, and a modifier or terminal T on a surface of the layer body; and an oxygen atom bonding a first titanium atom of a first layered material of the plurality of layered materials to a second titanium atom of a second layered material of the plurality of layered materials, wherein the conductive two-dimensional particle does not contain a chlorine atom, an iodine atom, and a bromine atom, and has at least one of a fluorine atom, an oxygen atom, or a hydroxyl group.

A method includes etching metallic impurities from an aluminosilicate mineral in a liquid acid etchant and separating solids including silica from the liquid acid etchant. The method further includes reducing the silica in the separated solids to silicon using a solid reducing agent resulting in a silicon-residual silica composite, removing aluminum chloride from the silicon-residual silica composite, dissolving oxides of the solid reducing agent in an acid solution, and separating silicon-residual silica solids remaining in the acid solution from the acid solution. The separated silicon-residual silica solids are dried to produce a clay mineral-derived silicon product.