Hydrogenated ZnO Core-Shell Nanocables for Flexible Supercapacitors and Self-Powered Systems
Hydrogenated ZnO Core-Shell Nanocables for Flexible Supercapacitors and Self-Powered Systems
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用于柔性超级电容器和自供电系统的氢化氧化锌核壳纳米电缆
DOI：
10.1021/nn306044d
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发表时间：
2013-03-01
期刊：
影响因子：
17.1
通讯作者：
Wang, Zhong Lin
中科院分区：
文献类型：
--
作者：
Yang, Peihua;Xiao, Xu;Wang, Zhong Lin
尽管MnO2具有优异的电化学性能和天然的丰度，是一种很有前途的超级电容器材料，但导电性差限制了其广泛应用。受氢化后氧化锌纳米线的电化学活性和电导率大大提高的启发，我们设计并制备了氢化单晶氧化锌@非晶氧化锌掺杂二氧化锰核壳纳米线缆作为SC电极，表现出优异的性能，如面积电容138.7 mF/cm(2)，比电容1260.9 F/g。经过10 000次充放电循环后，工作器件的表面总电容达到了26mF/cm2，仍保持了87.5%的原始电容。一种集成了串联5Cs和染料敏化太阳能电池的电源组被证明用于独立的自供电系统。
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.