Preparation method of lithium iron phosphate battery positive electrode material
A lithium iron phosphate battery and lithium iron phosphate technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as unsuitable for high rate charge and discharge, poor conductivity, etc., and achieve high charge and discharge performance and good rate performance Effect
Pending Publication Date: 2021-09-28
上海钰丽新材料科技有限公司
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The preparation method of the lithium iron phosphate battery positive electrode material comprises the following steps: dissolving ferric chloride in ethylene glycol, adding sodium acetate and polyethylene glycol, and performing heating; performing cooling to obtain ferroferric oxide; oxidizing the obtained ferroferric oxide into nano ferric oxide particles; mixing lithium acetate, nano ferric oxide and ammonium dihydrogen phosphate, performing mixing with a carbon source, and carrying out ball milling; sintering the powder, and performing cooling to obtain a carbon-coated lithium iron phosphate positive electrode material; washing the lithium iron phosphate powder, and adding an ethanol wetting agent to prepare turbid liquid; mixing soluble lithium salt, ferric salt and phosphate in an ethanol solution, adding the mixture into the turbid liquid, and performing mixing and drying; and roasting in an inert gas atmosphere to obtain the qualified lithium iron phosphate positive electrode material. According to the method, the defects in the prior art are overcome, the carbon-coated lithium iron phosphate positive electrode material is prepared by taking the ferric oxide particles as the raw material and the template, and the product can obtain the morphology of the template, is nano spherical particles with better uniformity and is smaller.
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