Few-Layered SnS2 on Few-Layered Reduced Graphene Oxide as Na-Ion Battery Anode with Ultralong Cycle Life and Superior Rate Capability
Few-Layered SnS2 on Few-Layered Reduced Graphene Oxide as Na-Ion Battery Anode with Ultralong Cycle Life and Superior Rate Capability
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DOI：
10.1002/adfm.201402833
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发表时间：
2015-01-21
影响因子：
19
通讯作者：
Zhao, Xinbing
中科院分区：
文献类型：
--
作者：
Zhang, Yandong;Zhu, Peiyi;Zhao, Xinbing
钠离子电池因其丰富的天然钠资源而被认为是锂离子电池的有前途的替代品。寻找高性能的负极材料是当前钠离子电池研究的热点，也是钠离子电池发展面临的巨大挑战。在这项工作中，一种新型的混合阳极合成的超细，少层的SnS 2锚定在少层的还原氧化石墨烯（rGO）通过一个简单的溶剂热路线。SnS 2/rGO杂化材料具有高容量、超长循环寿命和优异的上级倍率性能。混合动力车在100 mA g（-1）时可提供649 mAh g（-1）的高充电容量。在800 mA g（-1）（1.8 C）下，它可以产生469 mAh g（-1）的初始充电容量，其在400和1000次循环后可以分别保持在89%和61%。该混合动力还可以维持高达12.8 A g（-1）（接近28 C）的电流密度，其中充电过程可以在仅1.3分钟内完成，同时仍然提供337 mAh g（-1）的充电容量。SnS 2/rGO具有快速、稳定的储钠能力，是一种很有前途的钠离子电池负极材料。
Na-ion Batteries have been considered as promising alternatives to Li-ion batteries due to the natural abundance of sodium resources. Searching for high-performance anode materials currently becomes a hot topic and also a great challenge for developing Na-ion batteries. In this work, a novel hybrid anode is synthesized consisting of ultrafine, few-layered SnS2 anchored on few-layered reduced graphene oxide (rGO) by a facile solvothermal route. The SnS2/rGO hybrid exhibits a high capacity, ultralong cycle life, and superior rate capability. The hybrid can deliver a high charge capacity of 649 mAh g(-1) at 100 mA g(-1). At 800 mA g(-1) (1.8 C), it can yield an initial charge capacity of 469 mAh g(-1), which can be maintained at 89% and 61%, respectively, after 400 and 1000 cycles. The hybrid can also sustain a current density up to 12.8 A g(-1) (approximate to 28 C) where the charge process can be completed in only 1.3 min while still delivering a charge capacity of 337 mAh g(-1). The fast and stable Na-storage ability of SnS2/rGO makes it a promising anode for Na-ion batteries.