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 increasing energy demand of the modern world. The lithium-air batteries have great interest due to their having the highest energy density compared to the other battery technologies. However, the large implementation of lithium-air batteries is hindered using metallic Li anode, leading to low coulombic efficiency, low energy efficiency and safety problems. In this study, to improve the performances of these batteries, we designed the lithium-air battery by integrating the Li-Si based alloy anode and photo-catalyst loading porous carbon cathode. The results show that the designed lithium-air battery has low over potential through the extended cycling stability. The working voltage of the cell is below 2.5 V. This study indicates that the developed the lithium-air battery with higher coulombic efficiency and lower polarization values is the alternatives to the conventional lithium-air batteries, which comprise metallic Li anode and carbon-based cathode.

Keywords

• Alloy anode
• Photoassisted charging
• Lithium-air battery