Nitrogen and sulfur dual-doped graphene sheets as anode materials with superior cycling stability for lithium-ion batteries
Nitrogen and sulfur dual-doped graphene sheets as anode materials with superior cycling stability for lithium-ion batteries
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氮硫双掺杂石墨烯片作为锂离子电池负极材料具有优异的循环稳定性
DOI：
10.1016/j.electacta.2015.10.026
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发表时间：
2015
影响因子：
6.6
通讯作者：
Wang Yinghui
中科院分区：
文献类型：
--
作者：
Zhou Yuqi;Zeng Yan;Xu D;an;Li Peihang;Wang Heng-guo;Li Xiang;Li Yanhui;Wang Yinghui
通过聚（2，5-二巯基-1，3，4-噻二唑）（PDMcT）功能化氧化石墨烯的碳化反应，合成了新型氮硫双掺杂石墨烯片。在此，选择由市售的2，5-二巯基-1，3，4-噻二唑（DMcT）单体聚合的PDMcT作为氮和硫前体，其在氮和硫双掺杂石墨烯的形成中起关键作用。当作为锂离子电池的阳极材料进行评估时，氮和硫双掺杂的石墨烯片显示出1428.8mAh g1的高初始比容量、超过5000次循环的优异循环稳定性和良好的倍率性能（即使在10A g1的电流密度下也为107 mAh g1），这可以归因于独特的结构和双杂原子掺杂。
Novel nitrogen and sulfur dual-doped graphene sheets are synthesized via carbonization of poly(2,5-dimercapto-1,3,4-thiadiazole) (PDMcT) functionalized graphene oxides. Here, PDMcT, polymerized by the commercially available 2,5-dimercapto-1,3,4-thiadiazole (DMcT) monomer is chosen as the nitrogen.and sulfur precursor, which plays a key role in the formation of nitrogen and sulfur dual-doped graphene. When evaluated as anode materials for lithium ion batteries, the nitrogen and sulfur dual-doped graphene sheets show high initial specific capacity of 1428.8 mAh g1, excellent cycling stability over 5000 cycles, and good rate capability (107 mAh g1 even at a current density of 10 A g1), which can be attributed to the unique structure and dual-heteroatom doping.