均相沉淀法制备α-Ni(OH)_2及其电化学性能研究

Preparation of Al-Doped α-Ni(OH)_2 by Homogeneous Precipitation and Its Electrochemical Performance

采用均相沉淀法制备了可以在强碱性溶液中稳定存在的 Al 代 α-Ni(OH)2。X 射线衍射和扫描电子显微镜测试表明,试样结晶度很高,形貌为细小颗粒的团聚。采用恒流充放电测试方法研究了所制备的 α-Ni(OH)2的放电比容量。结果表明,试样的放电比容量较高,可以达到 290 mAh/g,而且充放电的极化程度小。

Al-substituted α-Ni(OH)2 which is stable in strong alkali solution was synthesized by homogeneous precipitation method and was studied by XRD, FTIR, SEM and galvanostat charge-discharge method. The results show that the crystallinity in the speciman is full The powder morphology is an aggregate which consist of small particles. The specific discharge capacity of this material is great (290 mAh/g) and polarization is small.