WEB Electrochemical thermodynamics of Lithium Batteries and their materialsFriday (29.05.2020) 12:45 - 12:45 Poster Room Part of:
In the past two decades, Lithium-ion batteries have dominated the energy storage market for portable electronic devices. However, the currently available batteries still require improvement for comprehensive commercial use (besides portable electronic devices: e.g. electromobility, stationary energy storage). The electrochemical thermodynamics of lithium batteries, and thereby their performance, is directly linked to the properties of the specific electrode materials used. This presentation will give a brief overview on the underlying theoretical relationships illustrated by some examples. Numerous phase diagrams and property diagrams for electrochemically active materials systems have been developed using experimental and computational thermodynamics in the past. With the already established thermodynamic databases, a prediction of electrochemical cell behaviour of Li-ion batteries has become practical. This also brings the possibility to design Li-ion batteries with optimized behaviours. Here, we demonstrate the support of improved performance and design of Lithium-ion batteries with e.g. LiMn2O4 cathode material using CALPHAD techniques. Good agreement was observed between calculations, own experimental work and literature information. The selected battery systems should be designed in a way to obtain an ideal open circuit voltage profile together with desired phase transformation routine in the electrodes.