Superior cycle stability of nitrogen-doped graphene nanosheets as anodes for lithium ion batteries
Superior cycle stability of nitrogen-doped graphene nanosheets as anodes for lithium ion batteries
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DOI：
10.1016/j.elecom.2011.05.012
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发表时间：
2011-08-01
影响因子：
5.4
通讯作者：
Sun, Xueliang
中科院分区：
文献类型：
--
作者：
Li, Xifei;Geng, Dongsheng;Sun, Xueliang
氮掺杂石墨烯纳米片（N-GNS）的比容量随着充放电循环明显增加，表现出优异的电化学性能。 N-GNS在第501次循环中呈现出684 mAh g(-1)的比容量，而在第100次循环中仅为452 mAh g(-1)，与原始石墨烯和商业化石墨负极相比，具有更高的循环稳定性和更大的比容量。所获得的显着改进归因于石墨烯平面中掺入氮，导致循环过程中出现更多结构缺陷。 (C) 2011 Elsevier B.V. 保留所有权利。
The specific capacity of nitrogen-doped graphene nanosheet (N-GNS) evidently increases with charge/discharge cycles, exhibiting superior electrochemical performance. N-GNS presented a specific capacity of 684 mAh g(-1) in the 501st cycles while only 452 mAh g(-1) in the 100th cycle, accounting for higher cycling stability and larger specific capacity in comparison to a pristine graphene and a commercialized graphite anode. The obtained significant improvement is attributed to the incorporated nitrogen to graphene planes with a result of more structural defects during cycling. (C) 2011 Elsevier B.V. All rights reserved.