AC impedance behaviour and state-of-charge dependence of Zr0.5Ti0.5V0.6Cr0.2Ni1.2 metal-hydride electrodes

Journal of Chemical Sciences

N Munichandraiah2²  A K Shukla1¹  S Rodrigues¹ 

[1] Solid State and Structural Chemistry Unit, Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India$$;Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India$$

关键词: Hydrogen-storage alloy;    metal-hydride electrode;    AC impedance;    AB2 alloys;    state-of-charge.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Metal-hydride electrodes made of an AB2 alloy of the composition Zr0.5Ti0.5V0.6Cr0.2Ni1.2 are studied for AC impedance behaviour at several of their state-of-charge values. Impedance data at any state-of-charge comprise two RC-time constants and accordingly are analysed by using a nonlinear-least-square-fitting procedure. Resistance of the electrode and frequency maximum (𝑓*) of the lowfrequency semicircle are found useful for predicting state-of-charge of the metalhydride electrodes.

【 授权许可】

Unknown