CAS: 10028-23-6; Iron(Ii) Phosphate

相似化合物

22763-03-7 51833-68-2 10294-50-5

专利信息

专利号:US-9174846-B2
优先权日:2009-09-18
标题 :Ferric phosphate and methods of preparation thereof
发明人：BECK LARRY W; SOLTANI MAHROKH; WANG LIYA
权利人:BECK LARRY W; SOLTANI MAHROKH; WANG LIYA; A123 SYSTEMS LLC
摘要:High-purity crystalline ferric phosphate material with desirable characteristics for use in synthesis of nano-sized LFP cathode material are described. The ferric phosphate dihydrate material has as disclosed herein has a molar ratio of phosphorous to iron is from about 1.001 to about 1.05, a surface area of from about 25 m 2 /g to about 65 m 2 /g, and is substantially free of metallic or magnetic impurities. Methods of synthesizing high-purity crystalline ferric phosphate material with desirable characteristics for use in synthesis of nano-sized LFP cathode material are also described. In some embodiments, one or more magnetic traps are used during the reaction process and/or after the formation of the final product to remove magnetic impurities. In some embodiments, a synthetic method of ferric phosphate using multiple steps is described, wherein the intermediate of the synthesis is isolated and purified to improve the purity of the ferric phosphate material. In some embodiments, an iron compound is added to an aqueous solution of phosphoric acid. The solution pH and temperature are controlled to ensure the complete dissolution of the iron compound. The desired iron phosphate crystalline material can be obtained with high purity and high crystalline phase purity by controlling the pH and temperature of the solution.

专利号:US-6814764-B2
优先权日:2000-10-06
标题 :Method for producing cathode active material and method for producing non-aqueous electrolyte cell
发明人：HOSOYA MAMORU; FUKUSHIMA YUZURU; SAKAI HIDEKI; KUYAMA JUNJI
权利人:SONY CORP
摘要:A method for producing a cathode active material having superior cell characteristics through single-phase synthesis of a composite material composed of a compound represented by the general formula Li x Fe 1-y M y PO 4 and a carbon material positively and a method for producing a non-aqueous electrolyte cell employing the so produced cathode active material. To this end, the cathode active material is prepared by a step of mixing the starting materials for synthesis of the compound represented by the general formula Li x Fe 1-y M y PO 4 , a step of milling a mixture obtained by the mixing step, a step of compressing the mixture obtained by the mixing step to a preset density and a step of sintering the mixture obtained by the compressing step. A carbon material is added in any one of the above steps prior to the sintering step. The density of the mixture in the compressing step is set to not less than 1.71 g/cm 3 and not larger than 2.45 g/cm 3 .

专利号:CN-117566718-A
优先权日:2023-11-29
标 题:A method for low-cost synthesis of lithium iron phosphate using lithium phosphate as a lithium source