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11.发明公开
公开(公告)号：EP4394932A1
公开(公告)日：2024-07-03
申请号：EP23845638.8
申请日：2023-07-27
发明人： WANG, Qin
IPC分类号： H01M4/36 , H01M4/505 , H01M4/525 , H01M4/58 , H01M10/054
CPC分类号： Y02E60/10
摘要： The present disclosure relates to the technical field of sodium ion batteries, and in particular to a sodium ion battery cathode material, and a preparation method and application therefor. The method for preparing a sodium ion battery cathode material of the present disclosure includes the following steps: (A) grinding a mixture of sodium borohydride and ferric manganese hydroxide to obtain first slurry, and performing spray drying and calcination on the first slurry to obtain a first calcinated material; and (B) grinding a mixture of the first calcinated material, a carbon source, a vanadium source, sodium bicarbonate, and water to obtain second slurry, and performing spray drying, calcination, crushing, sieving, and iron removal on the second slurry to obtain a sodium ion battery cathode material. The method is simple in step and low in cost, and the prepared sodium ion battery cathode material has the characteristics of being good in conductivity, high in capacity, high in energy density, etc.
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公开(公告)号：EP4276947A1
公开(公告)日：2023-11-15
申请号：EP22917627.6
申请日：2022-12-09
发明人： WANG, Qin
摘要： The present disclosure relates to a method for preparing ferroboron alloy-coated lithium iron phosphate, comprising: preparing ferrous phosphate and lithium phosphate, then mixing ferrous phosphate and lithium phosphate and adding a hydrazine hydrate solution to obtain a mixture which is then subjected to grinding, drying and then calcining to obtain a calcined mateiral, adding pure water to the calcined material and grinding the calcined material in water to obtain a slurry, to which PEG, ferrous sulfate crystals and disodium EDTA are added and stirred to dissolve, then adding a sodium borohydride solution and a sodium hydroxide solution while stirring and maintaining a pH in the process at 8.5-10.5, reacting for 15-30 min to obtain a product, and filtering, washing and vacuum drying the product to obtain the ferroboron alloy-coated lithium iron phosphate. The method may reduce interface resistance while improving conductivity, corrosion resistance, oxidation resistance and density of the product.
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