373 results about "Lithium sulphate" patented technology

The invention provides a titanium composite, which comprises lithium-titanium composite oxide and a lithium compound, wherein the lithium compound comprises the lithium-titanium compound oxide; and the lithium compound is at least one of lithium zirconate, lithium vanadate, lithium metasilicate, lithium metamanganate, lithium carbonate, lithium phosphate, lithium aluminate, lithium hydrogenphosphate, lithium hydroxide, lithium chlorate, lithium sulfate, lithium molybdate, lithium chloride, lithium borate, lithium citrate, lithium tartrate, lithium acetate and lithium oxalate. The composite can realize the high-rate and quick charge and discharge of a battery, improve the recycling performance and high temperature storage performance of materials and in particular improve the equality safety of batteries using high-performance titanium materials. The invention also provides a preparation method for the material, which is simple, easy to operate, high in yield and suitable for massive production. The composite of the invention has a wide application range, can be used alone or in combination with other electrode active materials as a cathode active material of various lithium ion batteries or an electrode material of capacitors.

Voltage delay in an active metal anode / liquid cathode battery cell can be significantly reduced or completely alleviated by coating the active metal anode (e.g., Li) surface with a thin layer of an inorganic compound with Li-ion conductivity using chemical treatment of Li surface. Particularly, preferred examples of such compounds include lithium phosphate, lithium metaphosphate, and / or their mixtures or solid solutions with lithium sulphate. These compounds can be formed on the Li surface by treatment with diluted solutions of the following individual acids: H3PO4, HPO3 and H2SO4, their acidic salts, or their binary or ternary mixtures in a dry organic solvent compatible with Li, for instance in 1,2-DME; by various deposition techniques. Such chemical protection of the Li or other active metal electrode significantly reduces the voltage delay due to protected anode's improved stability toward the electrolyte.

The invention provides a process for preparing battery grade lithium hydroxide monohydrate, comprising: (1) adding sodium hydroxide in lithium sulfate purification fluid and obtaining solid of Na2SO4, 10H2O and liquid of LiOH after completely dissolving and cooling, (2) obtaining liquid of LiOH after filtering and separating, (3) evaporating and concentrating the liquid of LiOH and filtering, separating and leaching the liquid of LiOH after cooling and crystallizing to obtain one-time crude product of LiOH, H2O, (4) adding deionized water in the one-time crude product of LiOH, H2O and obtaining re-dissolving solution of the one-time crude product of LiOH, H2O, (5) adding refining agent in the re-dissolving solution of the one-time crude product of LiOH, H2O and obtaining filtrate of LiOH refined liquor after filtering and separating, (6) filtering and separating the LiOH refined liquor after evaporating, concentrating, cooling and crystallizing to obtain solid of battery grade wet product of LiOH, H2O and (7) taking out the battery grade wet product of LiOH, H2O after drying to obtain battery product of LiOH, H2O. The invention is simple in production process, easy operation and perfect product quality.