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Direct mask-free fabrication of patterned hierarchical graphene electrode for on-chip micro-supercapacitors

Journal of Materials Science & Technology 2023年第12期143卷 12-19页

作者： Yaopeng Wu Jinghong Chen Wei Yuan Xiaoqing Zhang Shigen Bai Yu Chen Bote Zhao Xuyang Wu Chun Wang Honglin Huang Yong Tang Zhenping Wan Shiwei Zhang Yingxi Xie School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510640China Intelligent Perception Institute Zhejiang LabHangzhou 311100China School of Environment and Energy South China University of TechnologyGuangzhou 510006China

Graphene-based electrodes with rational structural design have shown extraordinary prospect for en-hanced electrical double-layer capacitance of micro-supercapacitors(MSCs).Herein,a facile fabrication method for flexible planar MSCs based on hierarchical graphene was demonstrated by using a laser-treated membrane for electrode patterning,complemented with hierarchical electrode configuration tak-ing full advantages of size-determined functional *** in-plane interdigital shape of MSCs was defined through vacuum filtration with the assistance of the functionalized polypropylene(PP)*** hierarchical graphene films were built by macroscopic assembly based on size effect of differ-ent lateral sized graphene sheets(rGO-LSL).The sample of MSCs based on rGO-L SL(MSCs-LSL)exhibited excellent volumetric capacitance of 6.7 F cm^(−3) and high energy density of 0.37 mWh cm−*** MSCs-LSL presented superb flexibility and cycling stability with no capacitance deteroriated after 2000 *** newly developed fabrication strategy is of good scalability and designability to manufacture flexible elec-trode for MSCs with customized shapes,while the construction of hierarchical graphene can enlighten the structural design of analogous two-dimensional materials for potential advanced electronics.

关键词： On-chip micro-supercapacitors mask-free fabrication Macroscopic assembly Patterned graphene film Hierarchical structure

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