Positive electrode active material, production method thereof and its use

摘要

A method of producing a positive electrode active material, comprising the steps of:
preparing a solution by dissolving, in a solvent, respective predetermined amounts of a lithium source, a M source, a phosphorus source and a X source necessary for forming a positive electrode active material represented by the following general formula (1) having an olivine structure;gelating the obtained solution by addition of a cyclic ether; andcalcinating the generated gel to obtain a carbon-coated lithium-containing composite oxide,wherein the positive electrode active material is represented by the general formula (1):
LixMyP1-zXzO4  (1)
wherein M is at least one element selected from the group consisting of Fe, Ni, Mn, Zr, Sn, Al and Y, X is at least one selected from the group consisting of Si and Al, and 0

主权项

1. A method of producing a positive electrode active material, comprising the steps of:
preparing a solution by dissolving, in a solvent, respective predetermined amounts of a lithium source, a M source, a phosphorus source and a X source necessary for forming a positive electrode active material represented by the following general formula (1) and having an olivine structure; increasing a viscosity of the obtained solution by adding a cyclic ether so as to generate a gel; and calcinating the generated gel to obtain a carbon-coated lithium-containing composite oxide, wherein the cyclic ether is used as a carbon source; wherein the positive electrode active material is represented by the general formula (1):
LixMyP1-zXzO4  (1) wherein M is Fe and Zr, X is at least one selected from the group consisting of Si and Al, and 0.8≦x≦1.2, 0.8≦y≦1.2, 0≦z≦0.5.