Micro-Computed Tomography for Studying the Microstructural Evolution of Sodium Metal Anodes in High-Capacity Sodium Metal Batteries (2025)
Abstract
Solid-state sodium metal batteries (SSSMBs), which use sodium metal as the anode and solid-state electrolytes (SSEs), have emerged as a promising battery technology. In our study, we developed SSSMBs using a poly(ethylene glycol) methyl ether methacrylate-co-4-vinylbenzenesulfonic acid sodium salt copolymer as the SSE, demonstrating long-term cycling stability, promising rate capability, and dendrite-free sodium deposition. However, the impact of SSE on sodium metal plating and stripping mechanisms, as well as electrolyte/electrode interface compatibility, remains unclear. This proposal aims to characterize the tomographic structure of the sodium metal anode using micro-computed tomography, providing fundamental insights for developing high-performance solid-state batteries.
