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题名: Carbon Electrode for Nonaqueous Li-O-2 Battery: the Influence of Surface Oxygen Species
作者: Zhou, Wei1, 2;  Li, Jing1, 2;  Nie, Hongjiao1, 2;  Zhang, Yining1;  Xi, Xiaoli1, 2;  Zhang, Huamin1
关键词: Carbon material ;  Surface oxygen species ;  Electrochemistry ;  Lithium ;  Oxygen
刊名: ELECTROCHIMICA ACTA
发表日期: 2014-08-20
DOI: 10.1016/j.electacta.2014.06.097
卷: 138, 页:410-416
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: Carbon materials are widely used for cathode preparation in Li-O-2 battery. The surface oxygen species is a crucial factor for the application of carbon electrode in nonaqueous Li-O-2 battery. In this work, oxygen species on carbon surface was regulated by heat treatment method, and we found oxygen species make double-edged sword effect. On the one hand, oxygen species will weaken the stability of carbon/electrolyte interface. On the other hand, the surface oxygen species shows promoting effect on oxygen reduction reaction, which is evidenced by cyclic voltammetry, tafel test and electrochemical impedance spectroscopy. In addition to the surface adjustment, the meso-pore and macro-pore volume was enlarged after heat treatment. More importantly, in advantage of more oxygen transport channels and lower affinity to electrolyte, the volume utilization rate of carbon electrode with lower oxygen amount is higher than the untreated carbon electrode. The capacity can reach 9033 mAh g(-1), nearly 1.3 times higher than the untreated one. (C) 2014 Elsevier Ltd. All rights reserved.
关键词[WOS]: LITHIUM-AIR BATTERY ;  HONEYCOMB-LIKE CARBON ;  ACTIVATED CARBONS ;  FUNCTIONAL-GROUPS ;  GRAPHENE NANOSHEETS ;  PERFORMANCE ;  CAPACITY ;  NITROGEN ;  CATHODE ;  REDUCTION
语种: 英语
WOS记录号: WOS:000341464000052
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145850
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, Div Energy Storage, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Zhou, Wei,Li, Jing,Nie, Hongjiao,et al. Carbon Electrode for Nonaqueous Li-O-2 Battery: the Influence of Surface Oxygen Species[J]. ELECTROCHIMICA ACTA,2014,138:410-416.
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