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题名: A hierarchically honeycomb-like carbon via one-step surface and pore adjustment with superior capacity for lithium-oxygen batteries
作者: Li, Jing1, 2;  Zhang, Yining1;  Zhou, Wei1, 2;  Nie, Hongjiao1, 2;  Zhang, Huamin1
关键词: Lithium-oxygen battery ;  Cathode ;  Hierarchical porous structure ;  Ammonia activation ;  Electrochemistry ;  Oxygen reduction
刊名: JOURNAL OF POWER SOURCES
发表日期: 2014-09-15
DOI: 10.1016/j.jpowsour.2014.03.117
卷: 262, 页:29-35
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: Li-O-2 batteries have attracted considerable attention due to their high energy density. The critical challenges that limit the practical applications include effective utilization of electrode space for solid products deposition and acceptable cycling performance. In the present work, a nitrogen-doped micron-sized honeycomb-like carbon is developed for use as a cathode material for Li-O-2 batteries. This novel material is obtained by using nano-CaCO3 particles as hard template and sucrose as the carbon source, followed by thermal annealing at 800 degrees C in ammonia. With one-step ammonia activation, surface nitrogenation and further pore structure optimization are realized simultaneously. The material exhibits enhanced activity for oxygen reduction reaction and oxygen transfer ability. Surprisingly, an improved cycling stability is also obtained. As a result, a superior discharge capacity up to 12,600 mAh g(-1) is achieved, about 4 times that of commercial Ketjenblack carbon. The results provide a novel route to construct effective non-metal carbon-based cathodes for high performance of Li-O-2 batteries. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: REDUCTION REACTION ;  LI-O-2 BATTERIES ;  AIR ELECTRODE ;  GRAPHENE ;  CATALYSTS ;  CATHODE ;  AMMONIA
语种: 英语
WOS记录号: WOS:000337199800005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145402
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, Div Energy Storage, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Li, Jing,Zhang, Yining,Zhou, Wei,et al. A hierarchically honeycomb-like carbon via one-step surface and pore adjustment with superior capacity for lithium-oxygen batteries[J]. JOURNAL OF POWER SOURCES,2014,262:29-35.
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