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采用水热法制备了纳米线/微米棒结构的CoV2O6电极材料,并探讨了纳米线/微米棒的形成机理.通过XRD、BET、SEM、TEM/HRTEM等测试手段对合成产物的结构、形貌、组成、表面性质进行了表征,结果表明,水热条件例如反应温度、反应时间对于产物的结构和形貌起关键作用.在220℃,水热反应1h可以得到直径为60nm的CoV2O6纳米线,而在220℃,水热反应6h可以得到直径10μm的CoV2O6微米棒.研究了CoV2O6纳米线/微米棒作为锂离子电池负极材料的电化学性能,结果显示,与CoV2O6微米棒相比,CoV2O6纳米线具有高的初始放电容量(1235mAh/g)和较好的循环稳定性,CoV2O6纳米线有希望作为锂离子电池的负极材料.
CoV2O6 electrode materials with nanowire / microrod bar structure were prepared by hydrothermal method and the formation mechanism of nanowire / microrod bar was discussed. The structure, morphology and morphology of the synthesized product were characterized by XRD, BET, SEM, TEM / HRTEM, , Composition and surface properties were characterized.The results show that the hydrothermal conditions such as reaction temperature and reaction time play a key role in the structure and morphology of the product.With hydrothermal reaction at 220 ℃ for 1h, CoV2O6 nanowires with diameter of 60nm can be obtained, However, CoV2O6 microrods with diameters of 10μm can be obtained by hydrothermal reaction at 220 ℃ for 6h.The electrochemical properties of CoV2O6 nanowires / microrods as cathode materials for lithium ion batteries were studied.The results show that compared with CoV2O6 microrods, CoV2O6 nanowires With high initial discharge capacity (1235mAh / g) and good cycle stability, CoV2O6 nanowires are promising as cathode materials for lithium-ion batteries.