One-step synthesis of robust carbon nanotube foams with ultrahigh surface area for high-performance lithium ion battery

论文摘要

A novel three-dimensional（3D） carbon nanotube foams（CNTF） with ultrahigh specific surface area have been fabricated through a unique but facile one-step synthesis by using CO2 as both carbon source and activating agent. The activation temperature and time have been adjusted, and the best sample demonstrates a specific surface area of 1959.8 m2g–1 and a total pore volume of 3.23 cm3g–1. A reversible capacity of about 870 mAhg–1 is maintained at 50 mAg–1 when the CNTF used as cathode materials. Meanwhile, the capacity is as large as 320 mAhg–1 at the current density of 2 A g–1 and the capacity retention is nearly 100% after 500 cycles. These excellent and highly stable battery performances should be attributed to the structural advantages of as-synthesized CNTFs generated by using a facile CO2-assisted strategy, which may potentially be applied in large scale production of porous 3D carbon materials in the fields of energy storage and conversion.

论文目录

• 1 Introduction
• 2 Experimental section
•   2.1 Synthesis and activation of carbon nanotube foams
•   2.2 Characterizations
•   2.3 Electrochemical tests
• 3 Results and discussion
• 4 Conclusion

文章来源

类型: 期刊论文

作者: YU PengCheng,YUAN YanChao

来源: Science China(Technological Sciences) 2019年03期

年度: 2019

分类: 工程科技Ⅱ辑,工程科技Ⅰ辑

专业: 无机化工,材料科学,电力工业

单位: School of Chemistry and Chemical Engineering, South China University of Technology,School of Materials Science and Engineering, South China University of Technology

基金: supported by the National Natural Science Foundation of China(Grant Nos.51273221&51873066),the Opening Project of Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education and Science and Technology Program of Guangzhou,China(201707010247)

分类号: TQ127.11;TB383.1;TM912

页码: 464-471

总页数: 8

文件大小: 11504K

下载量: 24