节点文献
Li1.05Fe(PO4)1-x(GeO3)x/C正极材料的制备及性能研究
Synthesis of the Li1.05Fe(PO4)1-x(GeO3)x/C cathode materials and their Electrochemical Performance
【Author】 LI Bian-yun,BAO Yu,HUANG Wei-jing,TONG Qing-song~* (College of Chemistry and Materials Science,Fujian Normal University,Fujian,Fuzhou 350007)
【机构】 福建师范大学化学与材料学院;
【摘要】 采用固相烧结法,在惰性气氛下制备了橄榄石型Li1.05Fe(PO4)1-x(GeO3)x/C(x=0.021,0.054,0.086)复合材料。采用X粉末衍射仪、充放电循环、循环伏安、交流阻抗等现代测试手段表征制备的样品的电化学性能。实验结果表明:掺锗可显著改善LiFePO4的大电流放电性能。理论组成为Li1.05Fe(PO4)0.95(GeO3)0.054/C的样品的电化学性能最佳。
【Abstract】 Li1.05Fe(PO4)1-x(GeO3)x/C(x=0.021,0.054,0.086) composites were prepared by using a solid state reaction under inert atmosphere.XRD,charge-discharge cycling,cyclic voltammetry,electrochemical impedance and other advanced techniques were employed to measure the electrochemical performance of the as-prepared samples. The experimental results show that the Ge dopant obviously improves the electrochemical performance of the samples while they discharged at high rate.The Li1.05Fe(PO4)0.95(GeO3)0.054/C sample exhibits the best electrochemical performance in the all as-prepared samples.
【Key words】 lithium-ion battery; Ge doping; lithium iron phosphate; cathode material;
- 【会议录名称】 第二十八届全国化学与物理电源学术年会论文集
- 【会议名称】第二十八届全国化学与物理电源学术年会
- 【会议时间】2009-11-19
- 【会议地点】中国广东广州
- 【分类号】TM912
- 【主办单位】中国电子学会化学与物理电源技术分会、中国电工技术学会氢能发电装置专业委员会、中国电工技术学会电池专业委员会、中国化学与物理电源行业协会