About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage 2026
|
| Presentation Title |
Development of Solid-Solution-Based Li-Alloy Negative Electrode for All Solid-State Batteries |
| Author(s) |
Chia-Yu Chang, Ayush Morchhale, Santosh Thapa, Yang-Tse Cheng, Jung-Hyun Kim, Alan A. Luo |
| On-Site Speaker (Planned) |
Chia-Yu Chang |
| Abstract Scope |
Lithium metal is a promising negative electrode for all-solid-state batteries due to its ultra-high theoretical capacity and low electrochemical potential; however, the anode/electrolyte interfacial instability, including dendrite growth and voids formation, remains challenging for the practical implementation of Li-metal. In this study, a solid-solution-based Li-alloy negative electrode with varying Mg content (0-15 at%) was developed to investigate the effect on the Li-alloy electrode/sulfide-based electrolyte interface stability. Highest CCD of 2 mA/cm2 was obtained for Li-1at% Mg which was significantly higher than the 1.2 mA/cm2 observed for pure Li. Moreover, in NMC/Li-alloy full cell, Li-1at% Mg shows a capacity retention of 93.73% after 150 cycles, which is higher compared to pure Li at 89.76%. Electrochemical impedance spectroscopy (EIS), distribution of relaxation times (DRT), and nano-indentation measurements were conducted to illustrate the importance of electro-chemo-mechanical properties of Li-alloy on the anode/sulfide-based electrolyte interface stability. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Other, |