| abstract |
The present invention provides a kind of lithium iron phosphate positive material method of modifying, comprises the following steps：1) certain density acetic acid and hydrogen peroxide mixed solution are configured, iron phosphate powder is then added, filtering, washing precipitate matter and drying after stirring a period of time obtain the iron phosphate powder after de- lithium；2) LiTFSI is added in organic solvent, appropriate thiophene and 3 is added after stirring and dissolving, 4 ethene dioxythiophenes, step 1 is added after well mixed) iron phosphate powder after obtained de- lithium, a period of time is reacted within the temperature range of 50 80 DEG C, then filter and washed with above-mentioned organic solvent and acetonitrile, the iron phosphate powder of coating modification is obtained after drying. |