层间阴离子对铝代Ni(OH)_2质子扩散系数的影响

Effect of Interlayer Anions on The Proton Diffuse Coefficient of Al Substituted Ni(OH)_2

采用化学共沉淀法制备了层间分别含有SO42-和NO3-的铝取代氢氧化镍样品。应用X-射线衍射(XRD)、傅里叶变换红外光谱(FTIR)和循环伏安法(CV)对样品的微观结构和质子扩散系数进行了比较。结果表明,两样品均为α-相氢氧化镍,其中层间含有NO3-的铝代氢氧化镍比层间含有SO42-的铝代氢氧化镍具有更好的结晶特性;循环伏安测试表明,层间含有NO3-的铝代氢氧化镍比层间含有SO42-的铝代氢氧化镍具有更好的电化学反应可逆性和更高的质子传递系数。

Al substituted nickel hydroxide samples with interlayer SO4^2- or NO3^- bave been synthesized by chemical coprecipitation method. The microstructure and proton diffuse coeflqcient of the prepared samples were analyzed by X-ray diffraction （XRD）, fourier transform infrared （FTIR）, and cyclic voltammetric （CV） measurements. The results showed that the nickel hydroxide with interlayer NOC had higher crystallization degree, better reaction reversibility, and higher proton diffuse coefficient than those of the nickel hydroxide with interlayer SO4^2-.