Improved Energy Efficiency of Lithium-Air Batteries by using Alloy Based Anode and Photocatalyst Loading Cathode

Abstract

The development of high energy density batteries has been rapidly advanced by the increasingenergy demand of the modern world. The lithium-air batteries have great interest due to their having the highestenergy density compared to the other battery technologies. However, the large implementation of lithium-airbatteries is hindered using metallic Li anode, leading to low coulombic efficiency, low energy efficiency andsafety problems. In this study, to improve the performances of these batteries, we designed the lithium-airbattery by integrating the Li-Si based alloy anode and photo-catalyst loading porous carbon cathode. The resultsshow that the designed lithium-air battery has low over potential through the extended cycling stability. Theworking voltage of the cell is below 2.5 V. This study indicates that the developed the lithium-air battery withhigher coulombic efficiency and lower polarization values is the alternatives to the conventional lithium-airbatteries, which comprise metallic Li anode and carbon-based cathode.