title: High-performance supercapacitors using a nanoporous current collector made from super-aligned carbon nanotubes.
abstract: Nanoporous current collectors for supercapacitors have been fabricated by cross-stacking super-aligned carbon nanotube (SACNT) films as a replacement for heavy conventional metallic current collectors. The CNT-film current collectors have good conductivity, extremely low density (27 microg cm(-2)), high specific surface area, excellent flexibility and good electrochemical stability. Nanosized active materials such as NiO, Co(3)O(4) or Mn(2)O(3) nanoparticles can be directly synthesized on the SACNT films by a straightforward one-step, in situ decomposition strategy that is both efficient and environmentally friendly. These composite films can be integrated into a pseudo-capacitor that does not use metallic current collectors, but nevertheless shows very good performance, including high specific capacitance (approximately 500 F g(-1), including the current collector mass), reliable electrochemical stability (<4.5% degradation in 2500 cycles) and a very high rate capability (245 F g(-1) at 155 A g(-1)).
authors.affiliation: Department of Physics, Tsinghua University, Beijing, People's Republic of China.
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Zhou
authors.forename: Chuizhou
authors.initials: C
authors.lastname: Meng
authors.forename: Feng
authors.initials: F
authors.lastname: Zhu
authors.forename: Qunqing
authors.initials: Q
authors.lastname: Li
authors.forename: Changhong
authors.initials: C
authors.lastname: Liu
authors.forename: Shoushan
authors.initials: S
authors.lastname: Fan
authors.forename: Kaili
authors.initials: K
authors.lastname: Jiang