Table of Contents
ISRN Electrochemistry
Volume 2013, Article ID 851921, 5 pages
http://dx.doi.org/10.1155/2013/851921
Research Article

Improved Performance of Hydrothermally Synthesized by Ball Milling as a Positive Electrode for Li Ion Battery

Department of Material and Environmental Engineering, Hakodate National College of Technology, 14-1 Tokura-cho, Hokkaido, Hakodate 042-8501, Japan

Received 4 December 2012; Accepted 23 December 2012

Academic Editors: A. I. Bhatt, X. He, A. A. Moya, C. M. Muller, and W. Xing

Copyright © 2013 Masashi Kotobuki. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

LiMnPO4 is anticipated to be a promising cathode material for next generation lithium battery. A reduction of particle size is recognized as a good strategy to improve its performance and it can be achieved by ball milling. However, the ball milling including carbon addition forms small LiMnPO4 particles with large carbon content, which leads to low volumetric energy density of electrode. In this study, carbon-coated LiMnPO4 prepared by hydrothermal route was applied to the ball milling without carbon addition. The reduction of particle size of carbon-coated LiMnPO4 was achieved by the ball milling without destroying the surface carbon layer. The ball-milled LiMnPO4 particle revealed better cathodic performance than non-milled sample. This was attributed to shortening Li ion diffusion path, improvement of structural flexibility, and large surface area of electrode due to reduction of particle size. The ball milling is attested to be a promising method to improve cathodic performance of carbon-coated LiMnPO4.