摘要
在天然石墨 ( NG)中掺杂不同比例的碳纳米管 ( CNT)得到纳米碳与石墨碳的复合材料 .电化学测试结果表明 ,在 NG中掺杂质量分数为 1 0 %的 CNT所得复合材料的电化学性能最好 .经过 2 0次充放电循环 ,该复合材料的放电容量比同样条件下的石墨提高 1 5 .9% .纳米碳管的中空式结构和不易塌陷的特点使复合材料的充放电容量和循环稳定性明显提高 .
When natural graphite(NG) is doped with different ratios of carbon nanotube(CNT),a composite material formed by nano-C and graphite-C was obtained. The measurements show that the complex with 10% CNT(in mass fraction) possesses the best electrochemical performance. Undergoing charge/discharge cycles for 20 times,the charge capacity of this material is obviously improved,15.9% more than that of pure graphite without CNT. Due to the mid-hollow structure and anti-collapse property for CNT,this composite material would increase charge/discharge capacity and stable cycle property. [WT5HZ]
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第6期1120-1123,共4页
Chemical Journal of Chinese Universities
基金
科技型中小企业技术创新基金 (批准号 :0 0 C2 62 2 2 2 0 0 964 )资助
关键词
锂离子电池
纳米材料
石墨
复合材料
Lithium ion battery
Nano-material
Graphite
Composite material
