Optimization of carbon coatings on LiFePO4

[摘要] The electrochemical performance of LiFePO4 in lithium cells is strongly dependent on the structure (disordered/graphene or D/G ratio) of the in situ carbon produced during synthesis from carbon-containing precursors. Addition of pyromellitic acid (PA) prior to final calcination results in lower D/G ratios, yielding a higher-rate material. Further, improvements in electrochemical performance are realized when graphitization catalysts such as ferrocene are also added during LiFePO4 preparation, although overall carbon content is still less than 2 wt.%. (c) 2005 Elsevier B.V. All rights reserved.

[发布日期] 2006-12-07

[效力级别]  Proceedings Paper

[关键词] lithium iron phosphate;lithium batteries;carbon;conductive coatings