METHOD OF PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE ACTIVE MATERIAL, AND SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To produce a positive electrode active material having small particle sizes with high uniformity in a simple process.SOLUTION: LiFePOparticles of small particle sizes are prepared by forming a hole by a nano imprint method to make a template and filling the template with a gel LiFePOmaterial, and the LiFePOparticles are used as a positive electrode active material for a secondary battery. The particle sizes can be made smaller than 50 nm. Further, the template may be burned down in the sintering of the LiFePOparticles. The positive electrode which allows lithium to be easily inserted into and eliminated from can be prepared by making the particle sizes of the positive electrode active material smaller than the conventional ones.SELECTED DRAWING: Figure 2