Elastic sandwich-type GaN/MnO2/MnON composites for flexible supercapacitors with high energy density
Elastic sandwich-type GaN/MnO2/MnON composites for flexible supercapacitors with high energy density
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用于高能量密度柔性超级电容器的弹性三明治型GaN/MnO2/MnON复合材料
DOI:
10.1039/c8ta04182b
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发表时间:
2018-07
影响因子:
11.9
通讯作者:
Hao Xiaopeng
中科院分区:
文献类型:
--
作者:
Wang Shouzhi;Shao Yongliang;Liu Weikang;Wu Yongzhong;Hao Xiaopeng
Metal oxides as supercapacitor (SC) electrode materials possess high capacitance and energy density, however, the low electrical conductivity and structural weakness resulting from volume shrinkage and expansion during the energy storage process seriously hinder their rate capabilities and cycling performances. Herein, we design and fabricate a metal nitride/metal oxide/metal oxynitride elastic sandwich structure nanohybrid with double stabilizing buffer layers for the first time. This unique hierarchical structure not only provides a highly conductive network and intimate contacts between carbon fiber (CF)/GaN and MnO2/Mn oxynitride (MnON) for effective charge transportation, but also offers synergistic physical restriction and chemical confinement of volume change during charge/discharge processes. Therefore, these conductive GaN/MnO2/MnON compact films used directly as an electrode possess a high areal capacitance of 1915.5 mF cm−2 (532.1 mA h cm−2) at 0.1 mA cm−2. A flexible symmetric supercapacitor device based on the GaN/MnO2/MnON hybrid electrode exhibits outstanding energy output efficiency (achieved energy density of 0.76 mW h cm−3), high capacity retention rate (95.5% capacity was retained after 10 000 cycles) and remarkable flexibility, showing its attractive prospect in wearable electronics and sustainable energy application. This design strategy provides an efficient way to apply large volume change metal oxide materials to energy storage and conversion devices.
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影响因子:
9.5
作者:
Litao Yan;Gen Chen;Shuai Tan;Meng Zhou;Guifu Zou;S. Deng;S. Smirnov;Hongmei Luo
通讯作者:
Litao Yan;Gen Chen;Shuai Tan;Meng Zhou;Guifu Zou;S. Deng;S. Smirnov;Hongmei Luo
影响因子:
17.6
作者:
Huaping Zhao;Minghong Zhou;Liaoyong Wen;Y. Lei
通讯作者:
Huaping Zhao;Minghong Zhou;Liaoyong Wen;Y. Lei
DOI:
10.1017/cbo9781139207249.009
发表时间:
2012
期刊:
--
影响因子:
--
作者:
W. Marsden
通讯作者:
W. Marsden
影响因子:
56.7
作者:
Lukatskaya, Maria R.;Kota, Sankalp;Gogotsi, Yury
通讯作者:
Gogotsi, Yury
影响因子:
10.8
作者:
Kuykendall, T;Pauzauskie, P;Yang, PD
通讯作者:
Yang, PD