Reduced Graphene Oxide/Tin-Antimony Nanocomposites as Anode Materials for Advanced Sodium-Ion Batteries
Reduced Graphene Oxide/Tin-Antimony Nanocomposites as Anode Materials for Advanced Sodium-Ion Batteries
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DOI：
10.1021/acsami.5b08274
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发表时间：
2015-11-11
影响因子：
9.5
通讯作者：
Xiao, Xingcheng
中科院分区：
文献类型：
--
作者：
Ji, Liwen;Zhou, Weidong;Xiao, Xingcheng
通过水热反应和随后的热还原处理，制备了负载锡锑合金的还原石墨烯氧化物(RGO-SnSb)纳米复合材料。透射电子显微镜图像证实，SnSb纳米粒子的平均尺寸约为20-30 nm，均匀分散在RGO表面。将合成的RGO-SnSb纳米复合负极用作可充电钠离子电池的负极，首次可逆容量高达407mAHg(-1)，循环保持率稳定在80次以上，在30C的超高充放电倍率下具有良好的循环稳定性。所合成的RGO-SnSb纳米复合材料作为钠离子电池负极的性能显著提高，这归功于RGO基柔性骨架和SnSb合金颗粒的纳米尺寸(
Reduced graphene oxides loaded with tin antimony alloy (RGO-SnSb) nanocomposites were synthesized through a hydrothermal reaction and the subsequent thermal reduction treatments. Transmission electron microscope images confirm that SnSb nanoparticles with an average size of about 20-30 run are uniformly dispersed on the RGO surfaces. When they were used as anodes for rechargeable sodium (Na)-ion batteries, these as-synthesized RGO-SnSb nanocomposite anodes delivered a high initial reversible capacity of 407 mAh g(-1), stable cyclic retention for more than 80 cycles and excellent cycle stability at ultra high charge/discharge rates up to 30C. The significantly improved performance of the synthesized RGO-SnSb nanocomposites as Na-ion battery anodes can be attributed to the synergetic effects of RGO based flexible framework and the nanoscale dimension of the SnSb alloy particles (