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题名: High Packing Density Unidirectional Arrays of Vertically Aligned Graphene with Enhanced Areal Capacitance for High-Power Micro-Supercapacitors
作者: Zheng, Shuanghao1, 2, 4;  Li, Zhilin3, 4;  Wu, Zhong-Shuai1;  Dong, Yanfeng1;  Zhou, Feng1;  Wang, Sen1, 4;  Fu, Qiang1, 2;  Sun, Chenglin1;  Guo, Liwei3;  Bao, Xinhe1, 2
关键词: vertically aligned ;  graphene ;  high power ;  micro-supercapacitors ;  on-chip ;  energy storage ;  electrochemical capacitors
刊名: ACS NANO
发表日期: 2017-04-01
DOI: 10.1021/acsnano.7b00553
卷: 11, 期:4, 页:4009-4016
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Interfacial integration of a shape-engineered electrode with a strongly bonded current collector is the key for minimizing both ionic and electronic resistance and then developing high-power supercapacitors. Herein, we demonstrated the construction of high power micro-supercapacitors (VG-MSCs) based on high-density unidirectional arrays of vertically aligned graphene (VG) nanosheets, derived from a thermally decomposed SiC substrate. The as-grown VG arrays showed a standing basal plane orientation grown on a (000 (1) over bar) SiC substrate, tailored thickness (3.5-28 mu m), high-density structurally ordering alignment of graphene consisting of 1-5 layers, vertically oriented edges, open intersheet channels, high electrical conductivity (192 S cm(-1)), and strong bonding of the VG edges to the SiC substrate. As a result, the demonstrated VG-MSCs displayed a high areal capacitance of similar to 7.3 mF cm(-2) and a fast frequency response with a short time constant of 9 ms. Furthermore, VG-MSCs in both an aqueous polymer gel electrolyte and nonaqueous ionic liquid of 1-ethyl-3-methylimidazolium tetrafluoroborate operated well at high scan rates of up to 200 V s(-1). More importantly, VG-MSCs offered a high power density of similar to 15 W cm(-3) in gel electrolyte and similar to 61 W cm(-3) in ionic liquid. Therefore, this strategy of producing high-density unidirectional VG nanosheets directly bonded on a SiC current collector demonstrated the feasibility of manufacturing high-power compact supercapacitors.
关键词[WOS]: HIGH VOLUMETRIC CAPACITANCE ;  WALLED CARBON NANOTUBES ;  DOUBLE-LAYER CAPACITORS ;  HIGH-PERFORMANCE ;  ELECTROCHEMICAL CAPACITORS ;  ON-CHIP ;  ORIENTED GRAPHENES ;  SILICON NANOWIRES ;  ENERGY-STORAGE ;  FILMS
语种: 英语
WOS记录号: WOS:000400233200061
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151962
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Res & Dev Ctr Funct Crystals, POB 603, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China

Recommended Citation:
Zheng, Shuanghao,Li, Zhilin,Wu, Zhong-Shuai,et al. High Packing Density Unidirectional Arrays of Vertically Aligned Graphene with Enhanced Areal Capacitance for High-Power Micro-Supercapacitors[J]. ACS NANO,2017,11(4):4009-4016.
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