Sun Quan, Huang Ying, Wu Shi, Gao Zhonghui, Liu Hang, Hu Pei, Qie Long
Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
Hubei Wanrun New Energy Technology Development Co., Ltd., Shiyan 442500, China.
Nanomaterials (Basel). 2019 Jul 28;9(8):1084. doi: 10.3390/nano9081084.
Sn/Nitrogen-doped reduced graphene oxide (Sn@N-G) composites have been successfully synthesized via a facile method for lithium-ion batteries. Compared with the Sn or Sn/graphene anodes, the Sn@N-G anode exhibits a superb rate capability of 535 mAh g at 2C and cycling stability up to 300 cycles at 0.5C. The improved lithium-storage performance of Sn@N-G anode could be ascribed to the effective graphene wrapping, which accommodates the large volume change of Sn during the charge-discharge process, while the nitrogen doping increases the electronic conductivity of graphene, as well as provides a large number of active sites as reservoirs for Li storage.
通过一种简便的方法成功合成了用于锂离子电池的锡/氮掺杂还原氧化石墨烯（Sn@N-G）复合材料。与锡或锡/石墨烯阳极相比，Sn@N-G阳极在2C时表现出535 mAh g的优异倍率性能，在0.5C下循环稳定性高达300次循环。Sn@N-G阳极改善的储锂性能可归因于有效的石墨烯包裹，它在充放电过程中适应了锡的大体积变化，而氮掺杂提高了石墨烯的电子导电性，并提供了大量作为锂存储库的活性位点。
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