電気化学原子間力顕微鏡を用いた硫酸中鉛電極表面反応のその場観察

抄録

An Electrochemical Atomic Force Microscope (EC-AFM) was used to observe the surface reaction of lead electrode in sulfuric acid electrolyte, when the reaction corresponding to what occurs at the electrode of a lead-acid battery takes place. At first, the morphology change at the surface of the lead electrode during Cyclic-Voltammetry measurement could be observed by using EC-AFM. After that, behavior of PbSO₄ crystals during open-circuit standing after oxidation was observed by in-situ EC-AFM, and the degradation of charge acceptance performance of lead-acid batteries during open-circuit standing after discharge could be explained by this observation result. In this paper, we introduce some technique with using EC-AFM for understanding of the electrochemical reaction at solid/liquid interface in the lead-acid battery.