Structural Engineering for High Energy and Voltage Output Supercapacitors |
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| Authors: | Jing Xu Hui Wu Chen Xu Hongtao Huang Dr Linfeng Lu Prof Guqiao Ding Dr Huili Wang Prof Dongfang Liu Prof Guozhen Shen Prof Dongdong Li Prof Xiaoyuan Chen |
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| Institution: | 1. Wuhan National Laboratory for Optoelectronics and College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 (P. R. China);2. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210 (P. R. China);3. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (P. R. China) |
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| Abstract: | High capacitance and high output voltage are two important research focuses of electrochemical supercapacitors. Herein we present two novel designs (laminated and tandem) of coin‐cell supercapacitors based on a textile coated with active material. The fabric electrodes were prepared by dipping the non‐woven cloth into a dispersion of carbon nanotubes and subsequent MnO2 electrodeposition. In the lamination configuration, several pieces of active‐material‐coated cloth were laminated to construct individual electrodes that enable fold‐increased areal capacitances and excellent cycling stability. In the tandem structure, individual cells with solid‐state electrolyte (polyvinyl alcohol/H3PO4) sandwiched between the fabric electrodes were stacked together to form a single device. The assembled device composed by ten unit cells was demonstrated to drive four LED digital screens in series with 10 V output. |
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| Keywords: | carbon nanotubes laminated structure manganese dioxide supercapacitors tandem structure |
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