Enhanced discharge capacity of Mg-air battery with addition of water dispersible nano MoS2 sheet in MgCl2 electrolyte

• DOI: 10.1007/s11581-018-2691-3
• Publication Date: 2018-08-17T07:07:36Z
• Authors: Arunkumar Prabhak...; Siva Palanisamy; Naveenkumar Rajen...; Rajendran Venkata...
• Keywords: Capacity loss

The aim of the present study is to increase the discharge capacity of Mg-air battery via electrolyte using water dispersible nano MoS2 sheet as electrocatalyst since MoS2 shows enhanced anodic behaviour. The nano MoS2 sheet was effectively synthesised by polymer exfoliation technique employing ball milling and then converted into water dispersible form by adjusting its pH value above 10. The structure, morphology, crystallinity, particle size distribution and surface area of water dispersible nano MoS2 (WDNMoS2) were characterised comprehensively employing different characterisation techniques. A detailed analysis of corrosion, impedance and charge discharge performance of Mg-air battery were carried out with and without water dispersible nano MoS2 (WDNMoS2) in MgCl2 electrolytes. The charge-discharge capacity of Mg-air battery is enhanced nearly 18% in case of addition of WDNMoS2 (1170 mAh g−1) to aqueous MgCl2 electrolytes compared with aqueous MgCl2 electrolyte (990 mAh g−1).