Layer-by-layered SnS2/graphene hybrid nanosheets via ball-milling as promising anode materials for lithium ion batteries
Layer-by-layered SnS2/graphene hybrid nanosheets via ball-milling as promising anode materials for lithium ion batteries
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通过球磨制备的层状 SnS2/石墨烯杂化纳米片作为锂离子电池负极材料
DOI：
10.1016/j.electacta.2018.03.022
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发表时间：
2018-04
影响因子：
6.6
通讯作者：
Xianyou Wang
中科院分区：
文献类型：
--
作者：
Jing Xia;Li Liu;Jianjun Xie;Hanxiao Yan;Yiting Yuan;Manfang Chen;Cheng Huang;Yue Zhang;Su Nie;Xianyou Wang
将水热处理得到的SnS2纳米片与商业石墨烯进行简单球磨，制备了层叠式SnS2/石墨烯(LL-SnS2/G)杂化纳米片。作为锂离子电池负极材料，LL-SnS_2/G的初始可逆容量高达696.27 mAhg−1，在200 mA g−1下的初始库仑效率为74.16%，180次循环后容量衰减可以忽略不计。此外，LL-SnS_2/G还具有优异的倍率性能，在567.78 mA·g−_1下提供了567.78 mAhg_ _1的高容量。由于具有高比容量的SnS_2纳米片与石墨烯的协同作用，石墨烯提高了SnS_2的导电性，缓冲了锂/脱锂过程中的体积变化，并在活性材料和电解液之间提供了有效的物理屏障，抑制了脱锂过程中形成的多硫化物的穿梭效应。LL-SnS_2/G具有优异的电化学性能，是一种很有前途的锂离子电池负极材料。
Layer-by-layered SnS2/graphene (LL-SnS2/G) hybrid nanosheets are fabricated via a simple ball-milling of SnS2nanoplates obtained through hydrothermal treatment and commercial graphene. When assessed as anode materials for LIBs, LL-SnS2/G shows a high initial reversible capacity of 696.27 mAh g−1with a high initial coulombic efficiency (74.16%) at 200 mA g−1, and negligible capacity fading over 180 cycles. Moreover, LL-SnS2/G also has an excellent rate capability, which delivers a high capacity of 567.78 mAh g−1at 2000 mA g−1. Benefits from synergism between SnS2nanoplates with high specific capacity and graphene, the graphene increases the conductivity of SnS2, buffers the volume change during lithiation/de-lithiation processes, and provides an effective physical barrier between the active materials and the electrolyte to suppress the shuttle effect of polysulfides formed during de-lithiation processes. LL-SnS2/G shows excellent electrochemical performance and is a promising anode material candidate for lithium ion batteries.
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