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题名: Hierarchical Graphene-Rich Carbon Materials with Trace Nonprecious Metals for High-Performance Li-O-2 Batteries
作者: Li, Jing1, 2;  Zhang, Yining1;  Zhou, Wei1, 2;  Nie, Hongjiao1, 2;  Wu, Baoshan1;  Zhang, Huamin1
关键词: carbon ;  catalysis ;  hierarchical structures ;  lithium-oxygen batteries ;  nanoparticles
刊名: CHEMPLUSCHEM
发表日期: 2015-02-01
DOI: 10.1002/cplu.201402044
卷: 80, 期:2, 页:390-395
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Sluggish kinetic characteristics of the electrode reactions and low electrode space utilization for solid Li2O2 deposition are limiting factors for Li-O-2 batteries. In this work, iron-/cobalt-doped micron-sized honeycomb-like carbon (Fe-MHC, Co-MHC) with a hierarchical pore structure is prepared by using nano-CaCO3 as a template. The effect of the transition-metal nanoparticles as a second template on further pore construction and optimization is presented. As graphitization catalysts, the added transition metals also affect the formation of the graphene-rich structure in the carbon framework. As a result, the obtained hierarchical carbon materials doped with trace metals exhibit higher electrochemical catalytic activity and stability than non-doped samples. In particular, an enhanced discharge capacity as high as 9260 mAhg(-1) is achieved for the Fe-MHC cathode, which is attributed to its enlarged pore volume and high utilization of the electrode space.
关键词[WOS]: LITHIUM-OXYGEN BATTERIES ;  HONEYCOMB-LIKE CARBON ;  ENERGY-STORAGE ;  AIR ELECTRODE ;  NITROGEN ;  REDUCTION ;  CATALYSTS ;  CAPACITY ;  CATHODE ;  NANOPARTICLES
语种: 英语
WOS记录号: WOS:000349469400015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145940
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 100049, Peoples R China

Recommended Citation:
Li, Jing,Zhang, Yining,Zhou, Wei,et al. Hierarchical Graphene-Rich Carbon Materials with Trace Nonprecious Metals for High-Performance Li-O-2 Batteries[J]. CHEMPLUSCHEM,2015,80(2):390-395.
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