Elucidating the Rate-Limiting Processes in High-Temperature Sodium-Metal Chloride Batteries.

ABSTRACT: Sodium-metal chloride batteries are considered a sustainable and safe alternative to lithium-ion batteries for large-scale stationary electricity storage, but exhibit disadvantages in rate capability. Several studies identify metal-ion migration through the metal chloride conversion layer on the positive electrode as the rate-limiting step, limiting charge and discharge rates in sodium-metal chloride batteries. Here the authors present electrochemical nickel and iron chlorination with planar model electrodes in molten sodium tetrachloroaluminate electrolyte at 300 °C. It is discovered that, instead of metal-ion migration through the metal chloride conversion layer, it is metal-ion diffusion in sodium tetrachloroaluminate which limits chlorination of both the nickel and iron electrodes. Upo

SUBMITTER: Landmann D 

PROVIDER: S-EPMC9189643 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature