Citation: Liu Weiwei, Zhu Menghua, Liu Jinghua, Li Xin, Liu Jian. Flexible asymmetric supercapacitor with high energy density based on optimized MnO₂ cathode and Fe₂O₃ anode[J]. Chinese Chemical Letters, ;2019, 30(3): 750-756. doi: 10.1016/j.cclet.2018.09.013 shu

Flexible asymmetric supercapacitor with high energy density based on optimized MnO₂ cathode and Fe₂O₃ anode

Liu Weiwei ^a ,
Zhu Menghua ^a ,
Liu Jinghua ^a ,
Li Xin ^a,c,**, ,
Liu Jian ^b,*,

a.
Department of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150090, China
b.
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
c.
State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China

^**

lixin@hit.edu.cn

liujian@qust.edu.cn

Received Date: 10 August 2018
Revised Date: 7 September 2018
Accepted Date: 17 September 2018
Available Online: 20 March 2018

Figures(6)

All-solid-state flexible supercapacitors have shown great potential in wearable and portable electronics. In this work, a flexible asymmetric pseudocapacitor (FAPC) is fabricated by using MnO₂ nanosheetscarbon fabric as cathode and Fe₂O₃ nanowire-carbon fabric as anode in the presence of PVA-LiCl as gel electrolyte. With high area capacitances of MnO₂ and Fe₂O₃ based electrodes by optimizing the reaction conditions, the device shows high working potential of 1.8 V, high area capacitance of 83.3 mF/cm² (119 F/g), stable cycling performance with 82.3% of capacitance retention after 5000 cycles, and a competitive energy density of 53.55 Wh/kg in the broader context of MnO₂-based supercapacitors. In addition, the FAPC demonstrates excellent mechanical stability and flexibility with negligible degradation of electrochemical performance after numerous bending tests, establishing it as a promising candidate for portable and wearable energy storage.
- Flexible,
- Asymmetric supercapacitor,
- MnO₂,
- Fe₂O₃,
- All-solid-state,
- Optimization
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Flexible asymmetric supercapacitor with high energy density based on optimized MnO2 cathode and Fe2O3 anode

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Flexible asymmetric supercapacitor with high energy density based on optimized MnO₂ cathode and Fe₂O₃ anode