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题名: Low charge overpotential of lithium-oxygen batteries with metallic Co encapsulated in single-layer graphene shell as the catalyst
作者: Tu, Yunchuan1, 2, 3;  Li, Haobo1, 3;  Deng, Dehui1, 2;  Xiao, Jianping1;  Cui, Xiaoju1, 2, 3;  Ding, Ding4;  Chen, Mingshu4;  Sao, Xinhe1
关键词: Charge overpotential ;  Electrocatalysis ;  Electron transfer ;  Lithium-oxygen batteries ;  Non-precious metals
刊名: NANO ENERGY
发表日期: 2016-12-01
DOI: 10.1016/j.nanoen.2016.08.066
卷: 30, 页:877-884
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Applied
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: Rechargeable lithium-oxygen (Li-O-2) battery has triggered tremendous attention as a promising candidate power source for portable electronics and light vehicles. Until now, a critical scientific challenge facing Li-O-2 battery is the high charge overpotential due to the sluggish oxygen evolution reaction (OER) on the oxygen electrode, which results in low energy efficiency and poor cyclability. Here, we demonstrated that nitrogen-doped single layer graphene shell encapsulating non-precious metal Co can be used as a highly efficient catalyst for Li-O-2 batteries. The catalyst showed significantly enhanced OER catalytic activity, with a charge overpotential of 0.58 V, which was remarkably lower compared with the corresponding N-free graphene encapsulating metal, metal oxide and metal-free carbon materials. DFT calculations revealed that the nitrogen dopants and enclosed metal clusters can synergistically modulate the electronic properties of the graphene surface, resulting in a dramatic reduction of the overpotentials. This study provides the possibility of the rational non-precious metal electrocatalysts designing for Li-O-2 batteries. (C) 2016 Published by Elsevier Ltd.
关键词[WOS]: NONAQUEOUS LI-O-2 BATTERIES ;  N-DOPED GRAPHENE ;  AIR BATTERIES ;  NANOTUBE COMPOSITE ;  REDUCTION REACTION ;  CATHODE CATALYSTS ;  CARBON ELECTRODE ;  NANOPARTICLES ;  ELECTROCATALYSTS ;  PERFORMANCE
语种: 英语
WOS记录号: WOS:000390636100101
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151829
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, State Key Lab Catalysis, iChEM, Zhongshan Rd 457, Dalian 116023, Peoples R China
2.Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, Xiamen 361005, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
4.Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

Recommended Citation:
Tu, Yunchuan,Li, Haobo,Deng, Dehui,et al. Low charge overpotential of lithium-oxygen batteries with metallic Co encapsulated in single-layer graphene shell as the catalyst[J]. NANO ENERGY,2016,30:877-884.
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