Citation: Chen Yuling, Chen Chao, Lv Ruitao, Shen Wanci, Kang Feiyu, Tai Nyanhwa, Huang Zhenghong. Flexible asymmetric supercapacitor based on MnO₂ honeycomb structure[J]. Chinese Chemical Letters, ;2018, 29(4): 616-619. doi: 10.1016/j.cclet.2017.12.028 shu

Flexible asymmetric supercapacitor based on MnO₂ honeycomb structure

a.
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
b.
Key Laboratory of Advanced Materials(MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
c.
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, China

Corresponding author: Huang Zhenghong, zhhuang@tsinghua.edu.cn
Received Date: 18 October 2017
Revised Date: 27 December 2017
Accepted Date: 28 December 2017
Available Online: 8 April 2018

Figures(4)

A flexible asymmetric supercapacitor with high energy density was constructed by using a flexible substrate of carbonized silk-fabrics decorated with carbon nanotube, electroplating MnO₂ nanosheets and dip-coating activated carbon powders as the positive and the negative electrodes, respectively. By controlling the electroplating time, the MnO₂ nanosheets can be self-assembled to honeycomb structure and showed excellent electrochemical performance in 1 mol/L Na₂SO₄ electrolyte with SC950-EP30 performing the best. It exhibited a high specific capacitance (1110.85 F/g at a current density of 1 A/g based on the mass of MnO₂) and superior rate capability (77.44% capacity retention from 1 A/g to 10 A/g). Thus, the optimal asymmetric device assembled with this material as positive electrode can deliver a maximum energy density of 43.84 Wh/kg and a maximum power density of 6.62 kW/kg.
- Electroplating,
- Self-assembling nanosheets,
- Honeycomb structure,
- MnO₂,
- Asymmetric supercapacitors,
- High energy density
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沈阳化工大学材料科学与工程学院沈阳 110142

Flexible asymmetric supercapacitor based on MnO2 honeycomb structure

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通讯作者: 陈斌, bchen63@163.com

Flexible asymmetric supercapacitor based on MnO₂ honeycomb structure