CPC H01M 4/5825 (2013.01) [C01B 25/45 (2013.01); H01M 10/0525 (2013.01); C01P 2002/72 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2006/10 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] | 10 Claims |
1. A preparation method of lithium iron phosphate, comprising:
sintering a dry material containing an iron source, a lithium source, a phosphorus source, and a reducing carbon source to obtain the lithium iron phosphate, wherein
a sintering atmosphere comprises a mild oxidizing gas, the mild oxidizing gas comprises carbon dioxide and a protective gas, wherein the protective gas comprises at least one of nitrogen, argon, helium, and neon, a total gas flow rate in the sintering atmosphere is 3 L/min to 6 L/min, and a sintering temperature is 800° C. to 900° C.
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