期刊
ACS NANO
卷 7, 期 3, 页码 2617-2626出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn306044d
关键词
supercapacitors; hydrogenation; core-shell; flexible; self-powered; ZnO
类别
资金
- Jinan University [1210559068, 2012Science18]
- National Natural Science Foundation of China [51102115]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [2010440112000S]
- Key Project of Chinese Ministry of Education [211208]
- China Scholarship Council [201206785006]
- Fundamental Research Funds for the Central Universities [21612109]
- Knowledge Innovation Program of the Chinese Academy of Sciences [KJCX2-YW-M13]
Although MnO2 is a promising material for supercapacitors (SCs) due to Its excellent electrochemical performance and natural abundance, its wide application is limited by poor electrical conductivity. Inspired by our results that the electrochemical activity and electrical conductivity of ZnO nanowires were greatly improved after hydrogenation, we designed and fabricated hydrogenated single-crystal ZnO@amorphous ZnO-doped MnO2 core-shell nanocables (HZM) on carbon doth as SC electrodes, showing excellent performance such as areal capacitance of 138.7 mF/cm(2) and specific capacitance of 1260.9 F/g. Highly flexible all-solid-state Ks were subsequently assembled with these novel HZM electrodes using polyvinyl alcohol/LiCl electrolyte. The working devices achieved very high total areal capacitance of 26 mF/cm2 and retained 87.5% of the original capacitance even after 10 000 charge/discharge cycles. An integrated power pack incorporating series-wound 5Cs and dye-sensitized solar cells was demonstrated for stand-alone self-powered systems.
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