电源技术2011，Vol.35Issue(3)：267-270,4.
掺Nb5+对LiFePO4高倍率性能的影响
Effect of Nb5+doping on high rate performance of LiFePO4
摘要
Abstract
LiFePO4/C cathode material was prepared by semi-solid phase-carbon-thermal reduction method, using ferric (Fe2O3) as Fe source, LiFe1-xNbxPO4/C(x=0,0.01,0.03,0.05,0.07) composite cathode materials were obtained with high-priced metal ions (Nb5+) doped in Fe site. X-ray diffraction analysis of the crystalline structure of samples indicates that, doping a certain amount of metal ions does not change the crystalline structure of materials. The charge-discharge cycle performance tests show that, doping high-priced ions can improve the electrochemical properties of materials. The specific discharge capacity of the samples is improved greatly and cycling stability is also improved to some extent. Especially in large current field, the advantages am more obvious compared with no metal ions doped LiPePO4/C. LiFePO4/C sample doped with 3％ Nb5+ has the best performance, and the first discharge specific capacity is 160.57 mAh/g at 0.1 C, which is still 136.43 mAh/g at 1 C, while at 10 C, the discharge specific capacity still maintains 95 mAh/g.关键词
磷酸铁锂/碳热还原/Nb5+/高倍率Key words
lithium iron phosphate/ carbon-thermal reduction/ Nb5+/ high rate分类
信息技术与安全科学引用本文复制引用
唐红,郭孝东,刘恒,唐艳,钟本和..掺Nb5+对LiFePO4高倍率性能的影响[J].电源技术,2011,35(3):267-270,4.基金项目
国家科技支撑计划(2007BAQ01055) （2007BAQ01055）
国家自然科学基金(50574063) （50574063）
