Work

Contact Mechanics of Solid-State Batteries

Year: 2025

Type: article

Abstract: The performance and stability of all-solid-state batteries (ASSBs) are critically dependent on the mechanical contact at their solid–solid interfaces. Poor contact between electrodes and the solid electrolyte limits the real area available for charge transfer, leading to increased interfacial impedance and performance degradation during cycling. This perspective establishes the current understanding of the fundamental principles of contact mechanics and their application to the dynamic, evolving electrochemical interfaces unique to ASSBs. We summarize recent advances in modeling and characterization techniques that diagnose contact loss and its evolution, which often manifests as a distinct constriction resistance in impedance measurements. Finally, we identify key knowledge gaps and outline future research directions required to overcome these interfacial challenges and advance ASSB development.

Source: Journal of Electrochemical Energy Conversion and Storage

DOI: 10.1115/1.4070745

Authors: Zeeshan Ahmad, Chang-Dong Yeo

Institution: Texas Tech University

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

Funder: Sandia National Laboratories