Fabrication of flexible, foldable Ag/Bi 2 S 3 nanoflowers-based asymmetric micro-capacitor

Micro & nano letters

article

Shuyu Liang¹  Fei Teng¹  Weiyi Hao¹  Wenhao Gu¹  Peipei Sun¹  Siyu Zhai¹  Xiaoman Yang¹ 

[1] Jiangsu Engineering and Technology Research Centre of Environmental Cleaning Materials (ECM), Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (AEET), Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology

关键词: bismuth compounds;    supercapacitors;    nanofabrication;    electrochemical electrodes;    silver;    electrical conductivity;    capacitance;    carbon fibres;    nanostructured materials;    electrodes;    foldable nanoflower-based asymmetric microcapacitor;    flexible nanoflower-based asymmetric microcapacitor;    foldable microcomponents;    flexible microcomponents;    energy devices;    active carbon;    carbon fibres;    positive material;    negative material;    areal capacitance;    current collector;    Bi2S3-based AMCs;    energy density;    electrical conductance;    Ag loading;    Ag-Bi2S3-C-C;   

DOI  :  10.1049/mnl.2019.0602

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Flexible and foldable microcomponents are highly desirable for energy devices. In this work, flexible asymmetric micro-capacitor (AMC) is fabricated by using uniform Ag/Bi 2 S 3 (or Bi 2 S 3 ) nanoflowers, active carbon and carbon fibres are used as positive material, negative material and current collector, respectively. On one hand, the areal capacitance of Ag/Bi 2 S 3 electrode has increased by more than 6 times than Bi 2 S 3 , and 86 and 68% of capacitances are retained for Ag/Bi 2 S 3 and Bi 2 S 3 electrodes after 4000 cycles, respectively. On the other hand, Ag/Bi 2 S 3 -based AMC has an energy density of (0.0134 mWhcm −3 ) 4.36 times higher than Bi 2 S 3 -based one (0.0025 mWhcm −3 ); after 4000 cycles, 84 and 33% of capacitances are retained for Ag/Bi 2 S 3 - and Bi 2 S 3 -based AMCs, respectively. The improved performances are mainly attributed to the enhanced electrical conductance by Ag loading (Bi 2 S 3 : 21.898 Ω; Ag/Bi 2 S 3 : 4.5643 Ω). Most importantly, the AMC is flexible and foldable, which is promising to conveniently apply in complicated energy devices, production for practical applications.

【 授权许可】

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