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题名: Hierarchical Micron-Sized Mesoporous/Macroporous Graphene with Well-Tuned Surface Oxygen Chemistry for High Capacity and Cycling Stability Li-O-2 Battery
作者: Zhou, Wei1, 2;  Zhang, Hongzhang1;  Nie, Hongjiao1, 2;  Ma, Yiwen1;  Zhang, Yining1;  Zhang, Huamin1
关键词: Li-O-2 battery ;  graphene hierearchical ;  structure oxygen ;  functional group ;  oxygen electroe
刊名: ACS APPLIED MATERIALS & INTERFACES
发表日期: 2015-02-11
DOI: 10.1021/am508513m
卷: 7, 期:5, 页:3389-3397
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Science & Technology - Other Topics ;  Materials Science
英文摘要: Nonaqueous LiO2 battery is recognized as one of the most promising energy storage devices for electric vehicles due to its super-high energy density. At present, carbon or catalyst-supporting carbon materials are widely used for cathode materials of LiO2 battery. However, the unique electrode reaction and complex side reactions lead to numerous hurdles that have to be overcome. The pore blocking caused by the solid products and the byproducts generated from the side reactions severely limit the capacity performance and cycling stability. Thus, there is a great need to develop carbon materials with optimized pore structure and tunable surface chemistry to meet the special requirement of LiO2 battery. Here, we propose a strategy of vacuum-promoted thermal expansion to fabricate one micron-sized graphene matrix with a hierarchical meso-/macroporous structure, combining with a following deoxygenation treatment to adjust the surface chemistry by reducing the amount of oxygen and selectively removing partial unstable groups. The as-made graphene demonstrates dramatically tailored pore characteristics and a well-tuned surface chemical environment. When applied in LiO2 battery as cathode, it exhibits an outstanding capacity up to 19 800 mA h g(-1) and is capable of enduring over 50 cycles with a curtaining capacity of 1000 mA h g(-1) at a current density of 1000 mA g(-1). This will provide a novel pathway for the design of cathodes for LiO2 battery.
关键词[WOS]: HONEYCOMB-LIKE CARBON ;  X-RAY PHOTOELECTRON ;  LITHIUM-AIR BATTERY ;  RAMAN SPECTROSCOPY ;  FREE CATHODE ;  ELECTRODE ;  NANOSHEETS ;  PERFORMANCE ;  COMPOSITE ;  OXIDE
语种: 英语
WOS记录号: WOS:000349580800047
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146011
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,Zhang, Hongzhang,Nie, Hongjiao,et al. Hierarchical Micron-Sized Mesoporous/Macroporous Graphene with Well-Tuned Surface Oxygen Chemistry for High Capacity and Cycling Stability Li-O-2 Battery[J]. ACS APPLIED MATERIALS & INTERFACES,2015,7(5):3389-3397.
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