Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9760324 | Journal of Power Sources | 2005 | 5 Pages |
Abstract
LiNi0.8Co0.2âxAlxO2 (0 â¤Â x â¤Â 0.1) cathode powders were prepared with a novel co-precipitation method followed by heat-treating at temperatures between 500 and 900 °C. The electrochemical properties as cathode material for lithium batteries were predicted with XRD patterns and examined with capacity retention studies. Among the prepared samples, 800 °C heat-treated un-substituted LiNi0.8Co0.2O2 sample showed the best cycling performance. However, the initial specific discharge capacity decreases with increase amount of Al-substitution for the LiNi0.8Co0.2âxAlxO2 powders prepared with the same process. It may due to the increase in the amount of electrochemical inactive Al3+ and the increase in the hindrance of Li+ ions diffusion by increasing Al3+ occupancy of interstitial tetrahedral 6c sites in the Al-substituted cathode materials.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
She-huang Wu, Chi Wei Yang,