采用化学共沉淀法制备了具有Q相和卢相相互嵌套结构的氢氧化镍。用X-射线衍射(XRD),傅里叶变换红外光谱(FT-IR)和扫描电子显微镜(SEM)分析了样品的微观结构和表面形貌。用循环伏安(CV)、交流阻抗(EIS)和充放电测试表征了样品的电化学性能。结果表明,与纯卢相氢氧化镍相比,α/β互嵌结构的氢氧化镍具有更高的电化学反应活性、更低的电化学反应阻抗和更高的放电比容量和放电电压。同时,α/β互嵌结构氢氧化镍还具有较好的循环性能。
α/β mutually embedded nickel hydroxide has been synthesized by chemical coprecip- itation method. The microstructure and surface morphology of the prepared samples were analyzed by X-ray diffraction (XRD), Fourier transform infrared (FTIR), and scanning electron microscopy (SEM). The electrochemical performance of the prepared sample was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and charge discharge tests. Compared to the pure β nickel hydroxide, the α/β mutually embedded nickel hydroxide shows a higher electrochemical reaction activity, lower electrochemical reaction impedance, higher discharge capacity, and higher discharge voltage. Moreover, α/β mutually embedded nickel hydroxide has better cyclic performance.