Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 50, Issue -, Pages 240-247Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2020.03.023
Keywords
Carbon nanotube foam; Pseudocapacitors; Co-doped NiO nanosheets; Freestanding electrode
Funding
- National Natural Science Foundation of China [U1710122, 51862035, 21773293]
- Science and Technology Project of Jiangxi Province [20181ACH80008, 20181ACE50012, 20192BCD40017, 20192ACB80002]
- Jiangxi Double Thousand Talent Program [S2018LQCQ0016]
- Suzhou Science and Technology Plan Projects [SYG201831]
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Developing high power and energy supercapacitors (SCs) is a long-pursued goal for the application in transportation and energy storage station. Herein, a rationally-designed Co-doped nickel oxide nanosheets@carbon-welded carbon nanotube foam (Co-doped NiO@WCNTF) as freestanding electrode is successfully prepared for high power and energy SCs. The WCNTF framework with high specific surface area provides three dimensional highly conductive network for fast charge transport and ensures high loading of active materials (9.2 mg/cm(2)). Moreover, porous Co-doped NiO nanosheets uniformly anchored on the WCNTF framework enable rapid charge kinetics due to the high intrinsic conductivity of Co-doped NiO nanosheets and their good contact with conductive WCNTF substrate. As a result, the unique integrated electrode with 3D architecture exhibits an ultrahigh specific capacitance of 11.45 F/cm(2) at 5 mA/cm(2), outstanding rate capability (11.45 F/cm(2) at 5 mA/cm(2) and a capacitance retention of 86.2% at 30 mA/cm(2)) and good cycling stability, suggesting great potential for high performance supercapacitor. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
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