The thermodynamics and kinetics of solid/solid interfaces are critical for the function of solid-state devices. In this presentation, the current status of research on interfaces in solid-state batteries will be briefly reviewed and compared to the current understanding of interfaces in solid oxide fuel cells. Recently, solid-state batteries are considered as a potential next generation energy storage [1-3], competing with conventional lithium ion batteries. Interestingly, major hurdles on the way to commercialisation have still to be overcome, and the kinetics of interfaces needs to be improved. In particular, the lithium metal anode is a key issue, as it is also the cathode interface where oxidation of solid electrolytes may take place. It is interesting to compare the development of solid-state batteries, which has only started a few years ago, with the development of solid oxide fuel cells. On the route to commercial products, the electrode interfaces and the design of stable electrodes, that offer low impedance kinetics was also a key step towards success, in addition to the development of superior solid electrolytes. Professor Janek’s results will be presented, highlighting the current status of lithium solid electrolytes with high conductivity, the role of interface coatings and natural interphases, as well as the influence of chemo-mechanics on the properties of full battery cells.
1. J Janek and WG Zeier, Nat Energy 1 (2016) 16141
2. Y Kato, S Hori, T Saito, K Suzuki, M Hirayama, A Mitsui, M Yonemura, H Iba, and R Kanno,
Nat Energy 1 (2016) 16030
3. Y J Nam, D Y Oh, S H Jung, and Y S Jung, J Power Sources 375 (2018) 93