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分别以碳球和葡萄糖为模板剂,采用水热法制备不同形貌的纳米V_2O5,另外在水热过程直接加入碳纳米管(CNT)和石墨烯(Gr)原位合成CNT/Gr/V_2O5纳米复合材料。结果表明:碳球和葡萄糖均有还原剂的作用,以碳球为模板制备的试样颗粒呈多层的方玫瑰花状,其在2 mV/s下的比电容达170 F/g;以葡萄糖为模板剂制备的试样呈多孔空心球状,在2 mV/s下的比电容达324 F/g。当葡萄糖浓度为1 mol/L时,原位合成的CNT/Gr/V_2O5纳米复合材料比表面积高达382.7 m2·g–1,在2 mV/s下的比电容达274 F/g,呈现出良好的电化学性能。
Abstract：V_2O5 nanoparticles with different morphologies were prepared by a hydrothermal method using carbon pellets and glucose as templates, and CNT/Gr/V_2O5 composites were in-situ synthesized by adding graphene(Gr) and carbon nanotubes(CNT) in the hydrothermal process. The results show that both carbon spheres and glucose both have a function of reducing agent. The sample particles prepared by using carbon spheres as a template are multi-layered rosettes with a specific capacitance of 170 F/g at a scanning rate of 2 mV/s. The samples prepared by using glucose as a template are porous and hollow microspheres with a specific capacitance of 324 F/g at a scanning rate of 2 mV/s. CNT/Gr/V_2O5 composite in-situ synthesized at a glucose amount of 1 mol/L has a specific surface area of 382.7 m2/g and a specific capacitance of 274 F/g at a scanning rate of 2 mV/s, showing a good electrochemical performance.
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基本信息:
DOI：10.14062/j.issn.0454-5648.2019.06.04
中图分类号:TB33;TQ135.11
引用信息:
[1]李牧,姜奉华,薛菲,等.纳米V_2O_5及其复合电极材料的电化学性能[J].硅酸盐学报,2019,47(06):735-741.DOI:10.14062/j.issn.0454-5648.2019.06.04.
基金信息:
山东省自然科学基金项目(ZR2012EMM005)
2019-03-26
2019-03-26
2019-03-26