兰州大学机构库 >物理科学与技术学院
Freestanding Three-Dimensional Graphene/MnO2 Composite Networks As Ultra light and Flexible Supercapacitor Electrodes
He, YM; Chen, WJ; Li, XD; Zhang, ZX(张振兴); Fu, JC; Zhao, CH; Xie, EQ(谢二庆); He, YM (reprint author), Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China.
Indexed BySCIE ; EI ; PubMed ; MEDLINE ; ESI
ESI NOTE2017-07-19;Highly Cited Papers
2013-01
Source PublicationACS NANO
Volume7Issue:1Pages:174-182
PublisherAMER CHEMICAL SOC
Publication PlaceWASHINGTON
AbstractA 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.
KeywordGraphene 3d Conductive Network Flexible Ultralight Mno2 Supercapacitor
Department[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
Subject AreaChemistry ; Science & Technology - Other Topics ; Materials Science
Project NumberNational Natural Science Foundation of China [61176058] ; Key Technology Research and Development Program of Gansu Province, China [1011GKCA027] ; Natural Science Foundation of Gansu Province [1107RJYA280]
Funding Project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
Funding OrganizationNSFC ; GSSTD
DOI10.1021/nn304833s
ISSN1936-0851
SubtypeArticle
Language英语
WOS IDWOS:000314082800021
EI ID20130515964765
PMID 23249211
First Inst
Citation statistics
Cited Times:822[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/103420
Collection物理科学与技术学院
Corresponding AuthorHe, YM (reprint author), Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China.
Recommended Citation
GB/T 7714
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.
APA He, YM.,Chen, WJ.,Li, XD.,Zhang, ZX.,Fu, JC.,...&He, YM .(2013).Freestanding Three-Dimensional Graphene/MnO2 Composite Networks As Ultra light and Flexible Supercapacitor Electrodes.ACS NANO,7(1),174-182.
MLA He, YM,et al."Freestanding Three-Dimensional Graphene/MnO2 Composite Networks As Ultra light and Flexible Supercapacitor Electrodes".ACS NANO 7.1(2013):174-182.
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