期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 1, 页码 268-274出版社
AMER CHEMICAL SOC
DOI: 10.1021/am404132j
关键词
ITO nanowire; MnO2; supercapacitor; electron transport; ion transport
资金
- Center for Multiscale Energy Systems
- National Research Foundation under the Ministry of Education, Science and Technology of Korea [2013-052268]
- KIST internal fund
- New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry Energy [20113020010040]
- Nano-Material Technology Development Program through the National Research Foundation of Korea (NRF)
- Ministry of Science, ICT & Future Planning [2012M3A7B4049989]
- National Agenda Project program of the Korea Research Council of Fundamental Science & Technology (KRCF)
- National Research Foundation of Korea
- Korean Government (MSIP)
- Korea Evaluation Institute of Industrial Technology (KEIT) [20113020010040] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A highly efficient 1-D flexible supercapacitor with a stainless steel mesh (SSM) substrate is demonstrated. Indium tin oxide (ITO) nanowires are prepared on the surface of the stainless steel fiber (SSF), and MnO2 shell layers are coated onto the ITO/SSM electrode by means of electrodeposition. The ITO NWs, which grow radially on the SSF, are single-crystalline and conductive enough for use as a current collector for MnO2-based supercapacitors. A flake-shaped, nanoporous, and uniform MnO2 shell layer with a thickness of similar to 130 nm and an average crystallite size of similar to 2 nm is obtained by electrodeposition at a constant voltage. The effect of the electrode geometry on the supercapacitor properties was investigated using electrochemical impedance spectroscopy, cyclic voltammetry, and a galvanostatic charge/discharge study. The electrodes with ITO NWs exhibit higher specific capacitance levels and good rate capability owing to the superior electronic/ionic transport capabilities resulting from the open pore structure. Moreover, the use of a porous mesh substrate (SSM) increases the specific capacitance to 667 F g(-1) at 5 mV s(-1). In addition, the electrode with ITO NWs and the SSM shows very stable cycle performance (no decrease in the specific capacitance after 5000 cycles).
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