摘要
为了探索具有鱼骨状特殊结构的纳米碳纤维作为锂离子电池负极材料的潜在应用价值,采用化学气相沉积(CVD)法制备了高纯度、高质量的鱼骨状纳米碳纤维,对其分别进行了酸处理、退火处理以及酸处理和退火处理相结合的复合处理,装配成模拟电池后通过恒流充放电测试,研究了不同预处理方式对该鱼骨状纳米碳纤维电化学嵌脱锂性能的影响.结果显示,简单的酸处理和退火处理未能明显改善鱼骨状纳米碳纤维电极的综合嵌脱锂性能,而将两者有效结合,则使该纳米碳纤维的首次充放电效率提高近两倍,并且明显提高了可逆容量及循环稳定性,嵌脱锂性能得到综合改善.
To investigate the appliction possibility of fish-bone graphite nanofibers （FB-GNFs） as anode materials of Li-ion battery, FB-GNFs with high purity and high quality were first synthesized by chemical vapor depositon （CVD） method, then treated separately by acid and annealing, and also treated by both acid and annealing, respectively. After simulative batteries were assembled, the influence of those pretreatments on the lithium insertion/extraction properties of FB-GNFs was also investigated by constantcurrent charge/discharge method. It was found that neither acid-treatment nor annealing alone has positive effects on improving the overall properties of lithium insertion/extraction into/from FB GNFs. However, FB-GNFs treated by both acid and annealing showed much better lithium insertion/extraction properties, where the insertion/extraction efficiency in the first cycle was increased almost twice compared to the asprepared sample and the cycling capacity and the stability were improved.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2006年第4期624-628,共5页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(50571087)
高等学校博士点科研基金资助项目(20030335071)
关键词
鱼骨状纳米碳纤维
预处理
嵌脱锂性能
FB-GNFs
pretreatments
lithium insertion/extraction properties
