Graphene-decorated V2O5 nanobelts (GVNBs) were synthesized via a low-temperature hydrothermal method in a single step. V2O5 nanobelts (VNBs) were formed in the presence of graphene oxide, a mild oxidant, which also enhanced the conductivity of GVNBs. From the electron energy loss spectroscopy analysis, the reduced graphene oxide (rGO) are inserted into the layered crystal structure of V2O5 nanobelts, which further confirmed the enhanced conductivity of the nanobelts. The electrochemical energy-storage capacity of GVNBs was investigated for supercapacitor applications. The specific capacitance of GVNBs was evaluated using cyclic voltammetry (CV) and charge/discharge (CD) studies. The GVNBs having V2O5-rich composite, namely, V3G1 (VO/GO = 3:1), showed superior specific capacitance in comparison to the other composites (V1G1 and V1G3) and the pure materials. Moreover, the V3G1 composite showed excellent cyclic stability and the capacitance retention of about 82% was observed even after 5000 cycles.
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机译：通过低温水热法一步一步合成了石墨烯修饰的V2O5纳米带。 V2O5纳米带（VNB）是在氧化石墨烯（一种弱氧化剂）的存在下形成的，这也增强了GVNB的电导率。根据电子能量损失谱分析，将还原的氧化石墨烯（rGO）插入V2O5纳米带的层状晶体结构中，这进一步证实了纳米带的导电性增强。研究了超级电容器应用中GVNB的电化学储能能力。使用循环伏安法（CV）和充电/放电（CD）研究评估了GVNB的比电容。与其他复合材料（V1G1和V1G3）和纯材料相比，具有富含V2O5的复合材料（即V3G1（VO / GO = 3：1））的GVNB显示出更高的比电容。此外，V3G1复合材料表现出优异的循环稳定性，即使经过5000次循环，仍可观察到约82％的电容保持率。
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