Electro?Chemo?Mechanical Modeling of Artificial Solid Electrolyte Interphase to Enable Uniform Electrodeposition of Lithium Metal Anodes

Nonuniform electrodeposition of lithium during charging processes is the key issue hindering development rechargeable Li metal batteries. This deposition process largely controlled by solid electrolyte interphase (SEI) on surface and design artificial SEIs an essential pathway to regulate Li. In this work, electro-chemo-mechanical model built implemented in a phase-field modelling understand correlation between physical properties The results show that improving ionic conductivity SEI above critical level can mitigate stress concentration preferred addition, mechanical strength found also non-uniform influence electrochemical kinetics, with Young's modulus around 4.0 GPa being threshold value for even By comparison experimental it clear most important direction future work improve without compromising strength. findings methodology presented here not only provide detailed guidelines Li-metal anodes but pave way explore strategies regulating other anodes.