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LITHIUM IRON PHOSPHATE POWDER MANUFACTURING METHOD, OLIVINE STRUCTURED LITHIUM IRON PHOSPHATE POWDER, CATHODE SHEET USING SAID LITHIUM IRON PHOSPHATE POWDER, AND NON-AQUEOUS SOLVENT SECONDARY BATTERY
LITHIUM IRON PHOSPHATE POWDER MANUFACTURING METHOD, OLIVINE STRUCTURED LITHIUM IRON PHOSPHATE POWDER, CATHODE SHEET USING SAID LITHIUM IRON PHOSPHATE POWDER, AND NON-AQUEOUS SOLVENT SECONDARY BATTERY
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机译：磷酸铁锂粉的制造方法，橄榄形结构的磷酸铁锂粉，使用所述磷酸铁锂粉的正极板和非水溶剂二次电池
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摘要
The present invention relates to a process for producing lithium iron phosphate particles having an olivine type structure, comprising a first step of mixing an iron oxide or an iron oxide hydroxide as an iron raw material which comprises at least one element selected from the group consisting of Na, Mg, Al, Si, Cr, Mn and Ni in an amount of 0.1 to 2 mol% for each element based on Fe, and a carbon element C in an amount of 5 to 10 mol% based on Fe, and has a content of Fe 2+ of not more than 40 mol% based on an amount of Fe and an average primary particle diameter of 5 to 300 nm, with a lithium raw material and a phosphorus raw material; a second step of controlling agglomerates diameter in the resulting mixture is 0.3 to 5.0 µm; and a third step of sintering the mixture obtained in the second step in an inert gas or reducing gas atmosphere having an oxygen concentration of not more than 0.1% at a temperature of 250 to 750°C.
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