|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XVII
||Phase Equilibria of the Li-Si-C System for Advanced Anodes in Li-ion Batteries
||Song-Mao Liang, Artem Kozlov, Martin DrŘe, Markus Rettenmayr, Rainer Schmid-Fetzer
|On-Site Speaker (Planned)
Silicon provides about 10 times higher specific Li storage capacity than carbon, thus, the phase equilibria and thermodynamic properties of the ternary Li-Si-C system are crucial for developing new anode materials containing Si and/or C for Li-ion batteries. In this work, the long-time annealing experiments confirmed the key three-phase equilibrium of βLi2C2+SiC+Li7Si3 at 630 ░C to 650 ░C. Then, we will illustrate that the key ternary experiment enforces re-examination of the binary sub-systems, especially revision of the Li-C and Si-C binary systems. A consistent thermodynamic description of the Li-Si-C ternary system has been constructed based on our recently published Li-Si system, and the Li-C and Si-C binary systems revised in this work. The calculated results show good agreement with experimental data. Applications of the newly developed thermodynamic description are presented, e.g. calculations of ternary phase equilibria and predicted open circuit voltages (OCV) in equilibrium for selected C-Si anode materials.
||Planned: Supplemental Proceedings volume