Effects of addition of layered double hydroxide to air electrodes for metal-air batteries

Abstract

In order to improve oxygen reduction performances of an air electrode using perovskite type La0.7Ca0.3CoO3 as an electrocatalyst, a layered double hydroxide (LDH) containing magnesium and aluminum was examined as an ionconducting additive. Although the addition of LDH impeded gas permeation of the catalyst layer of the electrode, it was effective in reducing charge transfer resistance of the electrode, and as a result, the oxygen reduction reaction of the air electrode was remarkably enhanced. © The Electrochemical Society of Japan.