Dresden 2017 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 2: SYLI: Symposium Interfacial Challenges in Solid-State Li Ion Batteries - Invited talks
HL 2.1: Invited Talk
Monday, March 20, 2017, 09:30–10:00, HSZ 02
Interfacial challenges in solid- state Li ion: some perspectives from theory — •Alan Luntz1, Saskia Stegmaier1, Johannes Voss1, and Karsten Reuter2 — 1Stanford University, Stanford, CA, USA — 2Technical University of Munich, Munich, Germany
Unfortunately, interfacial challenges severely limit power and cycle life in all solid- state Li ion batteries. We use theory to investigate some of the origins of these limitations with both continuum theory and DFT. The obvious ones are electrochemical stability of the electrolyte at the anode/cathode interfaces and mechanical issues relating to maintaining interfacial contact during cycling while inhibiting Li dendrite growth. We are especially trying to understand if any fundamental limitations exist from the structures of the double layers that form at the solid electrolyte- electrode or other interfaces in the solid-state stack. These can be quite different than in conventional liquid Li ion batteries. We use Li3OCl as a prototypical Li ion superionic conductor and discuss its properties and discuss its interface with model electrode interfaces.