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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: Co@Co3O4 Core-Shell Three-Dimensional Nano-Network for High-Performance Electrochemical Energy Storage
作者: Zhang, JL; Fu, JC; Zhang, JW; Ma, HB; He, YM; Li, FS(李发伸); Xie, EQ(谢二庆); Xue, DS(薛德胜); Zhang, HL(张浩力); Peng, Y(彭勇)
收录类别: SCIE ; EI ; MEDLINE
出版日期: 2014-07-09
刊名: SMALL
卷号: 10, 期号:13, 页码:2618-2624
英文摘要: An alternative routine is presented by constructing a novel architecture, conductive metal/transition oxide (Co@Co3O4) core-shell three-dimensional nano-network (3DN) by surface oxidating Co 3DN in situ, for high-performance electrochemical capacitors. It is found that the Co@Co3O4 core-shell 3DN consists of petal-like nanosheets with thickness of <10 nm interconnected forming a 3D porous nanostructure, which preserves the original morphology of Co 3DN well. X-ray photoelectron spectroscopy by polishing the specimen layer by layer reveals that the Co@Co3O4 nano-network is core-shell-like structure. In the application of electrochemical capacitors, the electrodes exhibit a high specific capacitance of 1049 F g(-1) at scan rate of 2 mV/s with capacitance retention of similar to 52.05% (546 F g(-1) at scan rate of 100 mV) and relative high areal mass density of 850 F g(-1) at areal mass of 3.52 mg/cm(2). It is believed that the good electrochemical behaviors mainly originate from its extremely high specific surface area and underneath core-Co "conductive network". The high specifi c surface area enables more electroactive sites for efficient Faradaic redox reactions and thus enhances ion and electron diffusion. The underneath core-Co "conductive network" enables an ultrafast electron transport.
作者部门: [Zhang, Junli ; Fu, Jiecai ; Zhang, Junwei ; Ma, Hongbin ; He, Yongmin ; Li, Fashen ; Xie, Erqing ; Xue, Desheng ; Peng, Yong] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Gansu, Peoples R China ; [Zhang, Haoli] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China
通讯作者: Peng, Y (reprint author), Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Gansu, Peoples R China.
学科分类: Chemistry; Science & Technology - Other Topics; Materials Science; Physics
文章类型: Article
所属项目编号: National Basic Research Program of China [2012CB933104] ; National Natural Science Foundation of China [11274145, 11034004] ; Program for Changjiang Scholars and Innovative Research Team in University [IRT1251] ; Fundamental Research Funds for the Central Universities [lzujbky-2013-19, 2022013zrct01] ; Scholarship Award for Excellent Doctoral Student - Ministry of Education of China
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 长江学者和创新团队发展计划 ; 中央高校基本科研业务费专项资金
项目资助者: NSFC ; MOST ; MOE ; LZU
语种: 英语
DOI: 10.1002/smll.201303926
ISSN号: 1613-6810
WOS记录号: WOS:000338992900016
EI记录号: 20142817928459
PM记录号: 24639377
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/106668
Appears in Collections:物理科学与技术学院_期刊论文

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Recommended Citation:
Zhang, JL,Fu, JC,Zhang, JW,et al. Co@Co3O4 Core-Shell Three-Dimensional Nano-Network for High-Performance Electrochemical Energy Storage[J]. SMALL,2014,10(13):2618-2624.
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