Superhigh capacity and rate capability of high-level nitrogen-doped graphene sheets as anode materials for lithium-ion batteries

被引:112
作者
Cai, Dandan [1 ]
Wang, Suqing [1 ]
Lian, Peichao [2 ]
Zhu, Xuefeng [3 ]
Li, Dongdong [1 ]
Yang, Weishen [3 ]
Wang, Haihui [1 ]
机构
[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou, Peoples R China
[2] Kunming Univ Sci & Technol, Fac Chem Engn, Kunming, Peoples R China
[3] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian, Peoples R China
基金
中国国家自然科学基金;
关键词
Nitrogen-doped; Graphene sheets; Anode material; Lithium-ion batteries; OXYGEN-REDUCTION REACTION; CARBON NANOTUBES; GRAPHITE OXIDE; LI STORAGE; NANOSHEETS; 1ST-PRINCIPLES; PERFORMANCE; CATALYST; UREA;
D O I
10.1016/j.electacta.2012.11.105
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A new facile approach is proposed to synthesize nitrogen-doped graphene sheets with the nitrogen-doping level as high as 7.04 at.% by thermal annealing pristine graphene sheets and low-cost industrial material melamine. The high-level nitrogen-doped graphene sheets exhibit a superhigh initial reversible capacity of 1123 mAh g(-1) at a current density of 50 mA g(-1). More significantly, even at an extremely high current density of 20 A g(-1), highly stable capacity of about 241 mAh g(-1) could still be obtained. Such an electrochemical performance is superior to those previously reported nitrogen-doped graphene sheets. The excellent electrochemical performance can be attributed to the two-dimensional structure, disordered surface morphology, high nitrogen-doping level, and the existence of pyridinic nitrogen atoms. The results indicate that the high-level nitrogen-doped graphene sheets could be a promising anode material for high-performance lithium-ion batteries. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:492 / 497
页数:6
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