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碳纳米管复合磷酸铁锂材料的制备及性能
Alternative TitleCarbon nanotube-modified LiFePO4 for high rate lithium ion batteries
Luo Wenbin1; Wen Lei1; Luo Hongze2; Song Rensheng1; Zhai Yuchun3; Liu Chang1; Li Feng1
2014
Source Publication新型炭材料
ISSN1007-8827
Volume29.0Issue:004Pages:287-294
Abstract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50C充放电时,比容量达到99mAh/g;同时该材料也具有优异的循环性能,在10C大电流充放电的情况下,450次循环后容量保持率仍大于90%。
Other AbstractA hybrid cathode material for high rate lithium ion batteries was prepared by ball-milling and spray-drying a slurry con- taining LiFePO4 nanoparticles, glucose and carbon nanotubes (CNTs) in water, followed by pyrolysis at 600 ℃ for 6 h under a gas mixture of 5% H2 in At. CNTs with a large aspect ratio form a continuous conductive network connecting the LiFePO4 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.
Keyword磷酸铁锂 碳纳米管 导电网络 锂离子电池
Indexed ByCSCD
Language中文
CSCD IDCSCD:5230020
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/153840
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.Council for Scientific and Industrial Research
3.东北大学
Recommended Citation
GB/T 7714
Luo Wenbin,Wen Lei,Luo Hongze,等. 碳纳米管复合磷酸铁锂材料的制备及性能[J]. 新型炭材料,2014,29.0(004):287-294.
APA Luo Wenbin.,Wen Lei.,Luo Hongze.,Song Rensheng.,Zhai Yuchun.,...&Li Feng.(2014).碳纳米管复合磷酸铁锂材料的制备及性能.新型炭材料,29.0(004),287-294.
MLA Luo Wenbin,et al."碳纳米管复合磷酸铁锂材料的制备及性能".新型炭材料 29.0.004(2014):287-294.
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