3 results about "Phosphate conversion coating" patented technology

This invention provides a method for preparing a lithium-rich manganese-based cathode material modified with red phosphorus, a cathode sheet, and a lithium-ion battery, comprising: mixing the lithium-rich manganese-based cathode material with red phosphorus at a mass ratio of 1:0.001 to 0.01, and calcining it at 300 to 600°C for 1 to 6 hours under vacuum to obtain the red phosphorus-modified lithium-rich manganese-based cathode material; the general chemical formula of the lithium-rich manganese-based cathode material is: Li 1+x Mn 1‑x1 Ni 1‑x2 Co 1‑ x3 O2. This method uses inexpensive raw materials and involves a simple reaction process. After red phosphorus is sublimated by high-temperature heating, it undergoes a gas-solid interface reaction with lithium-rich manganese-based cathode materials, forming a phosphate coating on the cathode surface. Simultaneously, spinel and oxygen vacancies are formed, achieving phosphorus doping inside the cathode. This effectively improves the reversibility and structural stability of the anion redox reaction of lithium-rich manganese-based cathode materials, enhancing the material's initial coulombic efficiency, reversible specific capacity, and long-term cycle stability.

The invention relates to a method for the recovery of valuable metals from anode sludge generated as a result of electroplating and / or electrochemical reactions, and the production of phosphate coating chemicals from the recovered valuable metals.

Provided is a grain oriented electrical steel sheet including a base metal steel sheet, an intermediate layer and an insulation coating, wherein: the intermediate layer is an oxide film; an average thickness of the oxide film is 2-500 nm; the insulation coating is a phosphate coating; an average thickness of the insulation coating is 0.1-10 μm. When grazing incidence X-ray diffraction is performed on the phosphate coating using a Co-Kα excitation source, the X-ray diffraction pattern has a diffraction peak originating from cristobalite-type aluminum phosphate at a diffraction angle of 2θ=24.8°; a half value width FWHM0.5 of the diffraction peak under a diffraction condition with an X-ray incident angle ω=0.5° and a half value width FWHM1.0 of the diffraction peak under a diffraction condition with an X-ray incident angle ω=1.0° satisfy 0.20°≤FWHM0.5≤2.00°, 0.20°≤FWHM1.0≤2.00°, and 0°≤|FWHM0.5−FWHM1.0|≤1.00°.