Monosodium glutamate as an effective electrolyte additive in lead acid battery

High-rate partial state of charge (HRPSoC) life and stability of lead-acid batteries are largely limited by the surface morphology of lead sulfate and the reactivity of anode plates. In this study, sodium glutamate (MSG) was introduced as an electrolyte additive for lead-acid battery to improve lead sulfate deposition process and lead sulfate crystal morphology at the interface between lead anode and sulfuric acid electrolyte, and the influence of MSG on battery performance were explored. By electrochemical tests and material characterization, it was proved that glutamic acid anion can promote the formation of uniform deposition of lead sulfate with a structure similar to stacked flakes, which make it easy to form active lead and restrain irreversible sulfate during the fast charging and discharging process.