Highly-ordered graphene architectures by duplicating melamine sponges as a three-dimensional deformation-tolerant electrode

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• 英文论文题名：Highly-ordered graphene architectures by duplicating melamine sponges as a three-dimensional deformation-tolerant electrode
• 论文作者：张超 ; Tianxi Liu
• 英文论文作者：Chao Zhang ; Tianxi Liu ; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials ; College of Materials Science and Engineering ; Donghua University
• 年：2016
• 作者机构：东华大学;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University;
• 会议召开时间：2016-10-28
• 会议录名称：2016淮海绿色功能材料论坛暨第三届徐州清洁能源材料论坛摘要集
• 语种：英文
• 分类号：O646.54;TB383.4
• 学会代码：ZGHY
• 会议名称：2016淮海绿色功能材料论坛暨第三届徐州清洁能源材料论坛
• 会议地点：中国江苏徐州
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：2
• 文件大小：380k
• 原文格式：D
• 会议级别：全国

摘要

In this study, macroscopic graphene-wrapped melamine foams(MF-G) were fabricated by an MF-templated layer-by-layer(LBL) assembly using graphene oxide as building blocks, followed by solution-processed reduction. By concisely duplicating sponge-like, highly ordered three-dimensional architectures from MF, the resulting MF-G with an interconnected graphene-based scaffold and tunable nanostructure was explored as compressible, robust electrodes for efficient energy storage. A thin layer of pseudocapacitive polypyrrole(PPy) was then attached and uniformly coated on MF-G, resulting in a well-defined core-double-shell configuration of the MF-G-PPy ternary composite sponges. The as-assembled devices exhibited enhancement of supercapacitor performance, with a high specific capacitance of 427 F g~(-1) under a compressive strain of 75% and an excellent cycling stability with only 18% degradation after 5,000 charge-discharge cycles. Besides, the MF-G-PPy electrode maintained stable capacitance up to 100 compression-release cycles, with a compressive strain of 75%. These encouraging results thus provide a new route towards the low-cost, easily scalable fabrication of lightweight and deformation-tolerant electrodes.
In this study, macroscopic graphene-wrapped melamine foams(MF-G) were fabricated by an MF-templated layer-by-layer(LBL) assembly using graphene oxide as building blocks, followed by solution-processed reduction. By concisely duplicating sponge-like, highly ordered three-dimensional architectures from MF, the resulting MF-G with an interconnected graphene-based scaffold and tunable nanostructure was explored as compressible, robust electrodes for efficient energy storage. A thin layer of pseudocapacitive polypyrrole(PPy) was then attached and uniformly coated on MF-G, resulting in a well-defined core-double-shell configuration of the MF-G-PPy ternary composite sponges. The as-assembled devices exhibited enhancement of supercapacitor performance, with a high specific capacitance of 427 F g~(-1) under a compressive strain of 75% and an excellent cycling stability with only 18% degradation after 5,000 charge-discharge cycles. Besides, the MF-G-PPy electrode maintained stable capacitance up to 100 compression-release cycles, with a compressive strain of 75%. These encouraging results thus provide a new route towards the low-cost, easily scalable fabrication of lightweight and deformation-tolerant electrodes.

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