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

作     者：YU PengCheng YUAN YanChao 

作者机构：School of Chemistry and Chemical Engineering South China University of Technology School of Materials Science and Engineering South China University of Technology 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2019年第62卷第3期

页      面：464-471页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

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) 

主　　题：carbon nanotube foam CO2-assisted activation ultrahigh surface area lithium ion battery 

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 CO_2 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 m^2 g^(–1) and a total pore volume of 3.23 cm^3 g^(–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 CO_2-assisted strategy, which may potentially be applied in large scale production of porous 3D carbon materials in the fields of energy storage and conversion.