A study on the electrolyte circulation effect of Mg-air battery

The theoretical discharge energy density of the Mg-Air battery, which is attracting attention as a next-generation battery, was modelled and the efficiency of electrolyte circulation was compared. After that, 180kWh class power facility was built using Mg-Air batteries, and the effect of electrolyte removal according to the circulation method was compared and investigated.

Effect of Jet Flow between Electrodes on the Cathode Quality in Copper Electrorefining with High Current Density

Increasing current density is one of the main methods for improving the productivity of copper electrorefining. However, in the conventional bottom-inlet/top-outlet mode, an increase in current density leads to a deterioration of the surface quality of the cathode copper. This paper describes an experimental study of the influence of the jet flow between electrodes on the cathode quality. The surface roughness and the standard deviation of the cathode copper were used to evaluate the cathode quality. The results showed that in the single-side jet inlet mode, the electrolyte circulation rate has great influence on the surface roughness of the cathode copper, which is inversely correlated. However, when the electrolyte circulation rate is small, the surface roughness of the cathode copper is not uniform. The farther the position at the surface of the cathode copper is to the jet region, the coarser the cathode copper surface, and vice versa.

High Energy Efficiency With Low-Pressure Drop Configuration for an All-Vanadium Redox Flow Battery

In this paper, we present experimental studies of electrochemical performance of an all-vanadium redox flow battery cell employing an active area of 103 cm2, activated carbon felt, and a novel flow field, which ensures good electrolyte circulation at low pressure drops. Extended testing over 151 consecutive charge/discharge cycles has shown steady performance with an energy efficiency of 84% and capacity fade of only 0.26% per cycle. Peak power density of 193 mW cm−2 has been obtained at an electrolyte circulation rate of 114 ml min−1, which corresponds to stoichiometric factor of 4.6. The present configuration of the cell shows 20% improved in peak power and 30% reduction in pressure drop when compared to a similar cell with a different electrode and a serpentine flow field.

The Core System Design for New Kilowatt Aluminum-Air Battery

The author puts forward the core system design scheme of kilowatt aluminum-air battery on the basis of its chemistry characteristics and calculated function parameters of cell stack, and introduces the component functions, including control design, functional electrolyte circulation, air transport, DC / AC inverter system and other modules.