PhD project: Soft materials for the Li-air battery electrode

Project description

It would be extremely helpful for electric vehicles if batteries had much higher energy densities than is currently possible. At the moment the dominant technology is the Li-ion battery. As has been known for sometime, one way to improve the energy density of these devices is to create a Li-air battery. Here one ingredient is no longer inside theĀ  battery but flows through. It was recently demonstrated that Li-air batteries can be recharged, previously a major stumbling block. Unfortunately, the performance degrades slightly too much with each succeeding charging and discharging cycle. The drop in performance is thought to be due to the non-ideal distance between the air, the electrolyte and the catalytic sites on the cathode surface. Hence, it is quite likely that the performance can be improved by modifying the morphology of the cathode. In this project you will explore experimentally different ways of structuring electrolyte, air and conducting particles to bring the key ingredients to the right locations.

Project supervisor

  • (School of Physics & Astronomy, University of Edinburgh)

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