METHOD FOR PREPARING LITHIUM IRON PHOSPHATE THROUGH WET PROCESS AND LITHIUM IRON PHOSPHATE PREPARED BY THE SAME

摘要

Provided are a method for preparing lithium iron phosphate through wet process and lithium iron phosphate prepared by the same, the steps thereof are as follows: each water-soluble compound containing lithium, iron, phosphorus or doping element M as required is dissolved into water respectively; then are cocurrently placed into a reaction vessel under stirring to give suspension, wherein Li, Fe and P satisfy the formula [mLi+n(1-m)/n M]:pFe:qPO₄=1:1:1, in this formula, n is valence of doping element, m is mole number of Li, (1-m)/n is mole number of doping element, p and q are mole numbers of Fe and PO₄ respectively; a reductive conductive agent is added; the suspension is spray-dried; the spray-dried product is baked and pulverized. The method is a simple process and can operate successively; mixing of liquid starting materials can make Li⁺, Fe²⁺, PO₄