Hydrogenated ZnO Core-Shell Nanocables for Flexible Supercapacitors and Self-Powered Systems

被引：771

作者：

Yang, Peihua ^{[1
,2
]}

Xiao, Xu ^{[4
,5
]}

Li, Yuzhi ^{[1
,2
]}

Ding, Yong ^{[3
]}

Qiang, Pengfei ^{[1
,2
]}

Tan, Xinghua ^{[1
,2
]}

Mai, Wenjie ^{[1
,2
,3
]}

Lin, Ziyin ^{[3
]}

Wu, Wenzhuo ^{[3
]}

Li, Tianqi ^{[4
,5
]}

Jin, Huanyu ^{[4
,5
]}

Liu, Pengyi ^{[1
,2
]}

Zhou, Jun ^{[4
,5
]}

Wong, Ching Ping ^{[3
]}

Wang, Zhong Lin ^{[3
,6
]}

机构：

[1] Jinan Univ, Dept Phys, Guangzhou 510632, Guangdong, Peoples R China

[2] Jinan Univ, Siyuan Lab, Guangzhou 510632, Guangdong, Peoples R China

[3] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[4] Huazhong Univ Sci & Technol, WNLO, Wuhan 430074, Peoples R China

[5] Huazhong Univ Sci & Technol, Coll Optoelect Sci & Engn, Wuhan 430074, Peoples R China

[6] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100085, Peoples R China

来源：

ACS NANO | 2013年 / 7卷 / 03期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

supercapacitors; hydrogenation; core-shell; flexible; self-powered; ZnO; HIGH-PERFORMANCE; FACILE SYNTHESIS; NANOTUBE ARRAYS; GRAPHENE; ELECTRODES; NANOWIRES; MORPHOLOGY; MECHANISM; DESIGN; SHEETS;

D O I：

10.1021/nn306044d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：2617 / 2626

页数：10

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