【摘要】 氢氧化镍是碱性蓄电池的正极活性物质,为了改善镍系列电池的性能,合成了掺杂α Ni(OH)2,它具有较高的放电平台,且放电曲线平坦,放电容量高,在碱性溶液中结构稳定。对它进行了电极性能研究。通过循环伏安法,结合Ran dle Sevick方程,得出了质子扩散系数为2.35×10-10cm2/s;通过交流阻抗法发现它由电化学极化阻抗和Warburg阻抗组成。更多还原

【Abstract】 Ni(OH)2 is widely used as an positive active material for rechargeable alkaline battery. The metalsubstituted αNi(OH)2, which has high discharge plateau, flat discharge curve, high discharge capacity and stable structure in alkaline solution, was synthesized and its electrode properties was studied in order to improve the characteristics of Nibased batteries. The proton diffusion coefficient of metalsubstituted αNi(OH)2 electrode is 2.35×10-10 cm2/s determined by cyclic voltammetry combined with RandleSevick formula. According to AC impedance analysis, its impedance spectra consists of electrochemical polarization impedance and Warburg impedance.更多还原