V2O3/rGO composite as a potential anode material for lithium ion batteries
V2O3/rGO composite as a potential anode material for lithium ion batteries
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V2O3/rGO复合材料作为锂离子电池的潜在负极材料
DOI：
10.1016/j.ceramint.2018.05.134
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发表时间：
2018-09-01
影响因子：
5.2
通讯作者：
Zheng, Jun-chao
中科院分区：
文献类型：
--
作者：
Xiao, Bin;Zhang, Bao;Zheng, Jun-chao
V2O3是一种很有前景的负极材料，以其1070 mAh g(-1)的高理论容量、低放电电位、价格低廉、来源丰富、环境友好等优点引起了研究人员的兴趣。然而，V(2)O(3)复合材料的低电导率和剧烈的体积变化阻碍了V2O3的发展和应用。在这项工作中，通过简便的溶剂热法和退火工艺成功制备了V2O3/还原氧化石墨烯（rGO）纳米复合材料。在此合成方案中，V2O3 纳米颗粒 (NP) 被 rGO 封装。这种独特的结构使rGO能够抑制体积变化并提高V2O3的离子和电子电导率。此外，V2O3 NPs 的尺寸为 5-40 nm，均匀分散在 rGO 片上，没有聚集。系统研究了V2O3/rGO在0.01-3.0 V电位范围内的Li+存储行为。V2O3/rGO纳米复合材料在0.1 A g(-1)电流密度下可实现823.4 mAh g(-1)的高可逆比容量，在4.0 A g(-1)高电流密度下可实现407.3 mAh g(-1)的高可逆比容量。这项研究的结果为具有广泛应用的基于 rGO 的功能材料的制造提供了见解。
V2O3 is a promising anode material and has attracted the interests of researchers because of its high theoretical capacity of 1070 mAh g(-1), low discharge potential, inexpensiveness, abundant sources, and environmental friendliness. However, the development and application of V2O3 have been hindered by the low conductivity and drastic volume change of V(2)O(3 )composites. In this work, V2O3/reduced graphene oxide (rGO) nanocomposites are successfully prepared through a facile solvothermal method and annealing process. In this synthesis protocol, V2O3 nanoparticles (NPs) are encapsulated by rGO. This unique structure enables rGO to inhibit volume changes and improve the ion and electronic conductivity of V2O3. In addition, V2O3 NPs, which exhibit sizes of 5-40 nm, are uniformly dispersed on rGO sheets without aggregation. The Li+ storage behavior of V2O3/rGO is systematically investigated in the potential range 0.01-3.0 V. The V2O3/rGO nanocomposite can achieve a high reversible specific capacity of 823.4 mAh g(-1) under the current density of 0.1 A g(-1), and 407.3 mAh g(-1) under the high current density of 4.0 A g(-1). The results of this study provide insight into the fabrication of rGO-based functional materials with extensive applications.