Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors

被引：38

作者：

Gong, Wei ^{[1
]}

Fugetsu, Bunshi ^{[2
]}

Wang, Zhipeng ^{[1
]}

Sakata, Ichiro ^{[1
,2
]}

Su, Lei ^{[3
]}

Zhang, Xueji ^{[3
]}

Ogata, Hironori ^{[4
]}

Li, Mingda ^{[5
,6
]}

Wang, Chao ^{[5
,6
]}

Li, Ju ^{[5
,6
]}

Ortiz-Medina, Josue ^{[7
]}

Terrones, Mauricio ^{[7
,8
,9
]}

Endo, Morinobu ^{[7
]}

机构：

[1] Univ Tokyo, Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Univ Tokyo, Policy Alternat Res Inst, Bunkyo Ku, Tokyo 1130033, Japan

[3] Univ Sci & Technol Beijing, Res Ctr Bioengn & Sensing Technol, Beijing 100083, Peoples R China

[4] Hosei Univ, Grad Sch Sci & Engn, Koganei, Tokyo 1848584, Japan

[5] MIT, Dept Nucl Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[6] MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[7] Shinshu Univ, Inst Carbon Sci & Technol, 4-17-1 Wakasato, Nagano 3808553, Japan

[8] Penn State Univ, Dept Mat Sci & Engn, Dept Chem, Dept Phys, University Pk, PA 16802 USA

[9] Penn State Univ, Ctr Dimens & Layered Mat 2, University Pk, PA 16802 USA

来源：

COMMUNICATIONS CHEMISTRY | 2018年 / 1卷

关键词：

ALL-SOLID-STATE; FLEXIBLE SUPERCAPACITORS; ENERGY-STORAGE; MNO2; CAPACITANCE; ELECTRODE; YARN;

D O I：

10.1038/s42004-018-0017-z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Manganese oxide (MnO2) has long been investigated as a pseudo-capacitive material for fabricating fiber-shaped supercapacitors but its poor electrical conductivity and its brittleness are clear drawbacks. Here we electrochemically insert nanostructured MnO2 domains into continuously interconnected carbon nanotube (CNT) networks, thus imparting both electrical conductivity and mechanical durability to Mno(2). In particular, we synthesize a fiber-shaped coaxial electrode with a nickel fiber as the current collector (Ni/CNT/MnO2); the thickness of the CNT/MnO2 hybrid nanostructured shell is approximately 150 mu m and the electrode displays specific capacitances of 231 mF cm(-1). When assembling symmetric devices featuring Ni/CNT/MnO2 coaxial electrodes as cathode and anode together with a 1.0 M Na2SO4 aqueous solution as electrolyte, we find energy densities of 10.97 mu Wh cm(-1). These values indicate that our hybrid systems have clear potential as wearable energy storage and harvesting devices.

引用

页数：8

共 36 条

[1] Crystalline MnO2 as possible alternatives to amorphous compounds in electrochemical supercapacitors [J].