ChemInform Abstract: Possible Cause of the Memory Effect Observed in Nickel‐Cadmium Secondary Batteries.

Abstract

Possible Cause of the Memory Effect Observed in Nickel-Cadmium Secondary Batteries. -The magnitude of working voltage lowering of the discharge curve observed after repeated shallow discharging and overcharging of nickel or cadmium capacity-limited cells is higher in the former cells. These cells show X-ray diffraction peaks characteristic for γ-NiOOH in addition to those for β-NiOOH, the sole component of charged-state normal Ni electrodes. The voltage lowering which appears to correspond to the first stage of the classic memory effect in practical batteries, thus seems to be attributable to γ-NiOOH formation in the Ni electrode. -(SATO, Y.; ITO, K.; ARAKAWA, T.; KOBAYAKAWA, K.; J.