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兰州大学机构库  > 物理科学与技术学院  > 期刊论文
题名: Freestanding Three-Dimensional Graphene/MnO2 Composite Networks As Ultra light and Flexible Supercapacitor Electrodes
作者: He, YM; Chen, WJ; Li, XD; Zhang, ZX(张振兴); Fu, JC; Zhao, CH; Xie, EQ(谢二庆)
收录类别: SCIE ; EI ; MEDLINE
出版日期: 2013-01
刊名: ACS NANO
卷号: 7, 期号:1, 页码:174-182
英文摘要: A lightweight, flexible, and highly efficient energy management strategy is needed for flexible energy-storage devices to meet a rapidly growing demand. Graphene-based flexible supercapacitors are one of the most promising candidates because of their intriguing features. In this report, we describe the use of freestanding, lightweight (0.75 mg/cm(2)), ultrathin (<200 mu m), highly conductive (55 S/cm), and flexible three-dimensional (3D) graphene networks, loaded with MnO2 by electrodeposition, as the electrodes of a flexible supercapacitor. It was found that the 3D graphene networks showed an ideal supporter for active materials and permitted a large MnO2 mass loading of 9.8 mg/cm(2) (similar to 92.9% of the mass of the entire electrode), leading to a high area capacitance of 1.42 F/cm(2) at a scan rate of 2 mV/s. With a view to practical applications, we have further optimized the MnO2 content with respect to the entire electrode and achieved a maximum specific capacitance of 130 F/g. In addition, we have also explored the excellent electrochemical performance of a symmetrical supercapacitor (of weight less than 10 mg and thickness similar to 0.8 mm) consisting of a sandwich structure of two pieces of 3D graphene/MnO2 composite network separated by a membrane and encapsulated in polyethylene terephthalate (PET) membranes. This research might provide a method for flexible, lightweight, high-performance, low-cost, and environmentally friendly materials used in energy conversion and storage systems for the effective use of renewable energy.
关键词: graphene ; 3D conductive network ; flexible ; ultralight ; MnO2 ; supercapacitor
作者部门: [He, Yongmin ; Chen, Wanjun ; Li, Xiaodong ; Zhang, Zhenxing ; Fu, Jiecai ; Zhao, Changhui ; Xie, Erqing] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
通讯作者: He, YM (reprint author), Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China.
学科分类: Chemistry; Science & Technology - Other Topics; Materials Science
文章类型: Article
所属项目编号: National Natural Science Foundation of China [61176058] ; Key Technology Research and Development Program of Gansu Province, China [1011GKCA027] ; Natural Science Foundation of Gansu Province [1107RJYA280]
所属项目名称: 国家自然科学基金项目 ; 甘肃省青年科技基金计划 ; 甘肃省科技支撑计划
项目资助者: NSFC ; GSSTD
语种: 英语
DOI: 10.1021/nn304833s
ISSN号: 1936-0851
WOS记录号: WOS:000314082800021
EI记录号: 20130515964765
PM记录号: 23249211
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/103420
Appears in Collections:物理科学与技术学院_期刊论文

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Recommended Citation:
He, YM,Chen, WJ,Li, XD,et al. Freestanding Three-Dimensional Graphene/MnO2 Composite Networks As Ultra light and Flexible Supercapacitor Electrodes[J]. ACS NANO,2013,7(1):174-182.
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