中文摘要：

以Ni（NO3）2·6H2O和NaOH为原料采用化学沉淀法制备了Ni（OH）2电极材料。采用X射线衍射（XRD）和场发射扫描电子显微镜（FESEM）表征了样品的微观结构,结果表明该样品是具有片状纳米次级结构的β-Ni（OH）2。采用循环伏安（CV）和电化学充放电测试研究了该β-Ni（OH）2样品的储锂性能,结果发现该样品作为锂离子电池负极材料具有非常高的储锂活性,在50 m A·g-1电流密度下其第3次循环放电比容量高于1550m A·h·g-1;样品电极中的碳含量对其循环性能和倍率性都有显著影响,通过交流阻抗（EIS）测试分析了样品电极中碳含量的作用机理。

英文摘要：

Ni（OH）2 sample is prepared by chemical precipitation method with Ni（NO3）2·6H2O and NaOH as raw materials. X-ray diffraction（XRD） and field emission scanning electron microscope（FESEM） analysis reveal that the sample is β-Ni（OH）2 with sheet-like hierarchical nanostructure. Cyclic voltammograms（CV） and charge-discharge tests are performed to study the lithium ion storage performance of the β-Ni（OH）2 sample. The results show that the prepared β-Ni（OH）2 sample has a very high lithium ion storage activity. For example, at a charge-discharge current density of 50 m A·g-1, the discharge capacity of the third cycle for the prepared β-Ni（OH）2 is higher than 1550 m A·h·g-1. The carbon content in electrode has a great influence on both the cyclic stability and rate performance of the β-Ni（OH）2 sample. The mechanism of carbon content on lithium storage performance of the β-Ni（OH）2 sample is analyzed by electrochemical impedance spectroscopy（EIS） tests.