Reaction and Mass Transport Simulations by LBM in Electrolyte of Aqueous Lithium-Air Battery

Abstract

The aqueous lithium-air battery receives much attention because of its high theoretical energy density; however, it is necessary to clarify the reaction and mass transport of the electrolytic solution in efforts to obtain much higher current density. In this study, numerical simulation employing the lattice Boltzmann method realized coupled simulation of transport phenomena of Li + and O 2 in the discharge process. The numerical results suggest the importance of supplying the electrolyte with sufficient O 2 to achieve discharge with high current density. The results of simulation indicate that a high-pressure O 2 supply and increased area of the air/electrolyte interface are effective solutions to realizing discharge with high current density.

Oxygen concentration measurement in the porous cathode of a lithium-air battery using a fine optical fiber sensor

“…In this study, we focus on the aqueous lithium-air secondary battery. The reaction in the cathode occurs by dissolution and diffusion of oxygen in the aqueous electrolyte, but insufficient oxygen supply from the air layer limits oxygen transport to the reaction site (Shibata et al, 2015). To realize a more powerful aqueous lithium-air battery, it is necessary to clarify and improve the oxygen transport phenomena in the porous cathode.…”

Effects of O2Concentration and Precipitates on the Lithium Air Battery

“…The aqueous electrolyte realizes cost reduction and ensures the safe use of a battery. However, to realize a more powerful lithium-air battery, it is necessary to clarify and improve the reaction and mass transport phenomena in the cathode (2). Low solubility of oxygen in aqueous electrolyte limits oxygen transport to the reaction site.…”