Microwave synthesis method for carbon coated iron phosphate of ion battery composite anode material

Abstract

The microwave synthesis process of carbon coated lithium iron phosphate as the composite positive electrode material for lithium ion cell includes the following steps: mixing material of lithium salt, organic ferrite, phosphate radical containing material and organic carbon source as coating material in the stoichiometric ratio of Li, Fe, P and C of 1 to 1 to 1 to 0.2-2 via ball milling with ethanol or acetone as dispersant for 3-6 hr; drying the mixture; tabletting; setting into alumina crucible together with active carbon and heating in microwave oven for 5-12 min. The lithium salt material may be inorganic Li2CO3 or LiOH, or organic lithium acetate, lithium lactate, lithium oxalate, lithium citrate or lithium formate; and the phosphate radical containing material may be (NH4)2HPO4 or (NH4)H2PO4.

Description

1. Technical field

[0001] The invention relates to the technical field of preparation of a composite anion positive electrode material for lithium ion batteries, in particular to an optimized microwave method for directly synthesizing a composite positive electrode material for lithium ion batteries. The composite positive electrode material is carbon-coated LiFePO 4 (Lithium Iron Phosphate). 2. Background technology

[0002] For half a century, with the take-off of industrialized production and the rapid economic growth, the energy crisis faced by mankind has become increasingly prominent. Governments and research institutes around the world are focusing on the development of new energy on the one hand, and on the other hand, they are paying more and more attention to the efficient storage and utilization of energy. Lithium-ion batteries have the advantages of high specific energy, small self-discharge, long cycle life, no memory effect and low environmental pollution, and...

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