title: Enhanced supercapacitance in anodic TiO2 nanotube films by hydrogen plasma treatment.
abstract: One-dimensional anodic titanium oxide (ATO) nanotube arrays hold great potential as electrode materials for high-performance electrochemical supercapacitors. However, their poor electronic conductivity limits their practical applications. Here, we develop a hydrogen (H2) plasma treatment method to greatly improve the electrochemical performance of ATO electrodes. Compared with pristine ATO, the nanotubes treated by H2 plasma illumination (ATO-H) present a rough and amorphous layer at the surface of the nanotubes with simultaneously incorporated Ti(3+) and -OH groups. At a current density of 0.05 mA cm(-2) in charge-discharge measurements, the specific capacitance of the ATO-H electrode has substantially increased ~7.4 times, with a value as high as 7.22 mF cm(-2). Moreover, the novel ATO-H electrode has also exhibited excellent rate capability (6.37 mF cm(-2) at a current density of 2 mA cm(-2)) and cycling performance with no degradation after 10,000 cycles.
authors.affiliation: Key Laboratory of Soft Chemistry and Functional Materials of Education Ministry, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China. Shanghai Advanced Research Institute, Chinese Academy of Sciences, 99 Haike Road, Zhangjiang Hi-Tech Park, Pudong, Shanghai 201210, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wu
authors.forename: Chen
authors.initials: C
authors.lastname: Xu
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.forename: Linfeng
authors.initials: L
authors.lastname: Lu
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Fan
authors.forename: Xiaoyuan
authors.initials: X
authors.lastname: Chen
authors.forename: Ye
authors.initials: Y
authors.lastname: Song
authors.forename: Dongdong
authors.initials: D
authors.lastname: Li