浸渍α-Ni(OH)_2稳定性的研究

Investigation on the Stability of Impregnated α-Ni(OH)_2

通过X射线衍射 (XRD)分析证实含B添加剂的镍电极活性物质晶型结构为α型 ,差热 热重 (DTA TG)分析则表明α Ni(OH) 2 层间有结构水或化学吸附水存在。探讨了添加剂B分别与Na2 S、Ca(NO3) 2 共沉积的镍电极性能。通过XRD及 50多次大电流充放电循环表明 ,该电极仍具有α型结构 ,且大电流放电容量的衰减受到一定程度抑制。

The crystal structure of active materials containing additive B of the nickel hydroxide electrode is of α-type showed by X-ray diffraction(XRD). Th e existence of structural absorbed water between crystal layers of nickel hydroxid ewas confirmed by Differential Thermal Analysis and Thermogravimetric Analysis (D TA-TGA). The performance of the nickel hydroxide electrode with additive B code posited with Na 2S or Ca(NO 3) 2 was examined. The result of XRD of the cryst alhydroxide showed that after 50 charge-discharge cycles with high currents the c r ystal structure was still of α-type and its capacity decrease was inhibited to a certain degree.