Ảnh hưởng của hình thái, cấu trúc pha của lớp PbO2 kết tủa điện hóa trên nền thép đến khả năng làm việc của điện cực PbO2 trong pin chì dự trữ

Abstract

In this work, the effects of morphology, phase composition of PbO₂ layers on mild steel covered by  Fe₃O₄ film were tested as the role of positive electrodes of lead acid reserve battery Pb| H₂SiF₆| PbO₂. Different parameters such as current density, concentration of lead nitrate, ion H⁺, temperature of electrolyte were optimized to obtain higher capacity of these electrodes. Maximum capacity was obseverd when the eletrolyte contained  0.75 mol/L Pb(NO₃)₂,  10^-3 mol/L ion H⁺, current density of 10 mA/cm², 20 ^oC. At the current density of 40 mA/cm², the open circuit voltage was 1840 mV and the maximun voltage was 1720 mV.

Keywords. Electrodeposition, PbO₂, Fe₃O₄ film, reserve battery.