8results about "Halide preparation methods" patented technology

The invention relates to the field of semiconductor materials with photoelectric functions, in particular to a synthesis method of a perovskite precursor material. According to the synthesis method of the perovskite precursor material, the waste liquid treatment step is added, the waste liquid treatment step is based on the synthesis step of the precursor material, lead-free emission and high lead element recovery rate are achieved, the preparation process is completely carried out in a conventional air environment, and extra environment control cost is avoided; no organic solvent is needed in the preparation process, and the solvent for washing can be completely recycled theoretically, so that the cost and environmental pollution are reduced; the lead element is recycled after preparation, so that the pollution is reduced while the cost is saved, and nearly complete utilization of the lead element can be realized in the circulation process; the prepared perovskite precursor is good in performance; the steps are simple and easy to industrialize.

Method for purifying metal halide precursors, and related compositions, related methods, and the like. A method comprises one or more of the following steps: obtaining a metal halide precursor, the metal halide precursor comprising a metal halide compound and at least one impurity; contacting the metal halide precursor with an oxygen-containing compound in a presence of a polar oxygen-free solvent to form a reaction product in solution; and separating the reaction product from at least one of at least a portion of the at least one impurity, at least a portion of the solution, or any combination thereof. Other compositions and methods are provided herein.

A method for producing a halide according to the present disclosure comprises baking, in a vacuum or in an inert gas atmosphere, a mixture material containing a powder of MOx and a powder of NH4X. M represents at least one element selected from rare earth elements, X represents at least one element selected from F, Cl, Br, and I, x is 1-2, and, when the average particle diameter of the powder of MOx is defined as D1 and the average particle diameter of the powder of NH4X is defined as D2, requirement (a) or (b) is satisfied.　(a): D1≤D2 and D2-D1≤0.5×D2 (b): D2<D1 and D1-D2≤0.5×D1

The present invention relates to methods of purifying metal halide precursors and related compositions, related methods, and the like. One method includes one or more of the following steps: obtaining a metal halide precursor, the metal halide precursor including a metal halide compound and at least one impurity; contacting the metal halide precursor with an oxygen-containing compound in the presence of a polar oxygen-free solvent to form a reaction product in solution; and separating at least one of the reaction product, at least a portion of the at least one impurity, at least a portion of the solution, or any combination thereof. Other compositions and methods are provided herein.

A coating layer for a substrate includes a coating material. The coating material includes graphene and / or graphene derivatives that reflect and / or absorb an electromagnetic (EM) wave having a frequency of above 20 GHz. The coating layer is deposited on a surface of the substrate.

The present invention relates to a high-entropy halide solid electrolyte material, a preparation method thereof, and an application thereof. The general formula of the high-entropy halide solid electrolyte material is: Li a M n X x , where M includes at least 5 metal elements from groups IIA, IIB, IIIA, IIIB, IVA, IVB, VA, and VB, and X includes one or more halogen elements; 1 < a < 5, 0.3 < n < 2, x = a + nε, and ε is the weighted average valence of M. The electrolyte material of the present invention is prepared by the following preparation method: Weigh the precursors LiX and the halides MX corresponding to at least 5 metal elements according to the stoichiometric ratio of the general formula ε and perform ball milling treatment to obtain a mixed powder. Press the mixed powder into tablets, then perform heat treatment sintering in an argon atmosphere, and then grind to obtain the target product. Compared with the prior art, the high-entropy halide solid electrolyte material of the present invention has better electrochemical stability and cycling stability in solid-state batteries, while ensuring high Li + ionic conductivity, and the preparation method has a simple process and easy-to-control conditions.

A method of producing hydrogen includes subliming a metal salt comprising a metal and a halide to yield a gas phase metal salt comprising the metal and the halide, and contacting the gas phase metal salt with a gas phase hydrocarbon to yield the metal in elemental form, carbon in elemental form, hydrogen gas, and a hydrogen halide comprising the halide.