V2O3 nanoparticles anchored onto the reduced graphene oxide for superior lithium storage
V2O3 nanoparticles anchored onto the reduced graphene oxide for superior lithium storage
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DOI：
10.1016/j.electacta.2017.01.133
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发表时间：
2017-03
影响因子：
6.6
通讯作者：
Jiugou Leng;Hailong Mei;L. Zhan;Yanli Wang;Shubin Yang;Yan Song
中科院分区：
文献类型：
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作者：
Jiugou Leng;Hailong Mei;L. Zhan;Yanli Wang;Shubin Yang;Yan Song
以氧化石墨烯和NH4VO3为原料，通过水热反应和退火工艺合成了V2O3/还原氧化石墨烯（V2O3-rGO）3D凝胶。尺寸为 4-10 nm 的 V2O3 纳米颗粒均匀且紧密地固定在石墨烯泡沫上。当用作锂离子电池负极材料时，V2O3-rGO 3D凝胶表现出高容量（786mAh g−1at 0.07Ag−1）、良好的循环稳定性（1000次循环后350mAhg−1at 1.86Ag−1）和优异的倍率性能（192mAhg−1at 37.2Ag−1）以及出色的电化学性能在很宽的温度范围内 0–75°C。理想的电化学性能应归因于高含量的V2O3、纳米级尺寸的V2O3和3D多孔石墨烯网络。
The V2O3/reduced graphene oxide (V2O3-rGO) 3D gels are synthesized by a hydrothermal reaction and annealing process, using graphene oxide and NH4VO3as raw materials. The V2O3nanoparticles with the size of 4–10 nm are homogeneously and closely anchored onto the graphene foam. When used as anode material for lithium-ion batteries, the V2O3-rGO 3D gel exhibits high capacity (786 mAh g−1at 0.07 A g−1), good cycle stability (350 mAh g−1at 1.86 A g−1after 1000 cycles) and excellent rate capability (192 mAh g−1at 37.2 A g−1) as well as distinguished electrochemical properties at a wide temperature range of 0–75 °C. The desirable electrochemical performance should be attributed to the high content of V2O3, the nanoscale size of V2O3and the 3D porous graphene network.