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Carbon nanotube-modified LiFePO_4 for high rate lithium ion batteries
碳纳米管复合磷酸铁锂材料的制备及性能

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Luo Wenbin 1   Wen Lei 1   Luo Hongze 2   Song Rensheng 1   Zhai Yuchun 3   Liu Chang 1   Li Feng 1 *  
文摘 A hybrid cathode material for high rate lithium ion batteries was prepared by ball-milling and spray-drying a slurry containing LiFePO_4 nanoparticles, glucose and carbon nanotubes(CNTs) in water, followed by pyrolysis at 600 ℃ for 6 h under a gas mixture of 5% H_2 in Ar. CNTs with a large aspect ratio form a continuous conductive network connecting the LiFePO_4 nanoparticles and amorphous carbon, which significantly reduces the electrical resistance of the cathode. The hybrid material can deliver a specific capacity of 99 mAh/g at a 50 C charge/discharge rate. An excellent cycling performance was also demonstrated, with a capacity loss of less than 10% after 450 cycles at a 10 C rate.
其他语种文摘 结合磷酸铁锂纳米化,并利用碳纳米管良好的导电性和大长径比等优良特性,采用喷雾干燥方法制备出碳纳米管原位复合磷酸铁锂正极材料。碳纳米管在材料合成过程中均匀分散在活性物质中,形成连续贯通的三维导电网络,这种结构可显著提高磷酸铁锂正极材料的电子导电性和锂离子的扩散速率。所得材料具有良好的大电流放电特性,在50 C充放电时,比容量达到99mAh/g;同时该材料也具有优异的循环性能,在10 C大电流充放电的情况下,450次循环后容量保持率仍大于90%。
来源 新型炭材料(中英文) ,2014,29(4):287-294 【核心库】
DOI 10.1016/s1872-5805(14)60138-4
关键词 LiFePO_4 ; Carbon nanotubes ; Conductive framework ; High rate cathode materials
地址

1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang National Laboratory for Materials Science, Shenyang, 110004  

2. Council for Scientific and Industrial Research, South Africa, Pretoria  

3. School of Materials and Metallurgy, Northeastern University, Shenyang, 110004

语种 英文
文献类型 研究性论文
ISSN 1007-8827
学科 一般工业技术
基金 "Strategic Prioristy Research Program"of the Chinese Acade my of Sciences ;  国家自然科学基金 ;  State Key Development Program for Basic Research of China (973)
文献收藏号 CSCD:5230020

参考文献 共 39 共2页

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引证文献 4

1 曹贺 炭材料在低温型磷酸铁锂材料中的应用分析及展望 新型炭材料(中英文),2022,37(1):46-58
被引 1

2 邱惠惠 碳纳米管的综合应用研究进展 化工新型材料,2015,43(5):227-229
被引 0 次

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