期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 3, 页码 1043-1049出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta07842g
关键词
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资金
- Priority Research Centers Program [2009-0093823]
- Korean Government (MSIP) through National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology (MEST) [2015R1A5A1037668]
- Korea Research Fellowship Program - Ministry of Science, ICT and Future Planning through the National Research Foundation of Korea [2015-11-1063]
- Yonsei University Future-leading Research Initiative
- Ministry of Science & ICT (MSIT), Republic of Korea [2E27090] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2015H1D3A1036112, 2009-0093823] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Rational assembly and hetero-growth of hybrid structures consisting of multiple components with distinctive features are a promising and challenging strategy to develop materials for energy storage applications. Herein, we propose a supercapacitor electrode comprising a three-dimensional self-supported hierarchical MnCo-layered double hydroxides@ Ni(OH)(2) [MnCo-LDH@ Ni(OH)(2)-core-shell heterostructure on conductive nickel foam. The resultant MnCo-LDH@ Ni(OH)(2) structure exhibited a high specific capacitance of 2320 F g(-1) at a current density of 3 A g(-1), and a capacitance of 1308 F g(-1) was maintained at a high current density of 30 A g(-1) with a superior long cycle lifetime. Moreover, an asymmetric supercapacitor was successfully assembled using MnCo-LDH@ Ni(OH)(2) as the positive electrode and activated carbon (AC) as the negative electrode. The optimized MnCo-LDH@Ni(OH)(2)//AC device with a voltage of 1.5 V delivered a maximum energy density of 47.9 W h kg(-1) at a power density of 750.7 W kg(-1). The energy density remained at 9.8 W h kg(-1) at a power density of 5020.5 W kg(-1) with excellent cycle stability.
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