NiO/TiO_2-B一维纳米复合材料的制备及在锂离子电池中的应用研究

Preparation of One-dimension NiO /TiO_2 -B Nanocomposite and Application for Lithium Ion Batteries

通过水热法及均匀沉淀法制备了NiO/TiO2-B一维复合纳米材料。利用XRD、SEM等表征了纳米带的结构与形貌,采用恒电流充放电、CV等手段,对制备的复合纳米材料电极进行了电化学性能测试。结果表明,采用水热法及均匀沉淀法可以较为便捷的制备出NiO/TiO2-B纳米带,而且负载NiO后纳米带电化学性能得到了明显的提升,在0.1C倍率条件下首次放电容量可以达到304 mAh/g,高于纯TiO2-B纳米带的234 mAh/g;在1C的倍率下复合材料的首次放电容量可以达到233 mAh/g,容量提升了33.9%;在200次循环后容量仍能保持129 mAh/g。

One-dimension NiO/TiO2 hybrid nanomaterials were synthesized via a hydrothermal process and subsequent homogeneous precipitation method. The structure and morphology of nanoribbons were characterized by XRD, SEM. The electrochemical performance of the TiO2-B nanoribbons electrodes were investigated by galvanostatic charge-discharge and cyclic vohammetry（CV）, The results showed that the NiO/TiO2-B hybrid nanoribbons could be prepared conveniently by hydrothermal method, the introduction of NiO particals increasing the electrochemical performance. The initial discharge capacity of hybrid nanomaterials is 304 mAh/g at the rate of 0.1 C, higher than the pure TiO2-B nanoribbons, which is 234 mAh/g, the initial discharge capacity of NiO/TiO2-B nanomaterials is 233 mAh/g during the first cycle at 1 C, improving 33.9% than the TiOE-B nanoribbons, the capacity remaines 129 mAh/g after 200 charge/discharge cycles at 1 C.