Structural Evolution of Air-Exposed Layered Oxide Cathodes for Sodium-Ion Batteries: An Example of Ni-doped Na_xMnO₂.

ABSTRACT: Sodium-ion batteries have recently aroused the interest of industries as possible replacements for lithium-ion batteries in some areas. With their high theoretical capacities and competitive prices, P2-type layered oxides (Na_xTMO₂) are among the obvious choices in terms of cathode materials. On the other hand, many of these materials are unstable in air due to their reactivity toward water and carbon dioxide. Here, Na_0.67Mn_0.9Ni_0.1O₂ (NMNO), one of such materials, has been synthesized by a classic sol-gel method and then exposed to air for several weeks as a way to allow a simple and reproducible transition toward a Na-rich birnessite phase. The transition between the anhydrous P2 to the hydrated birnessite structure

SUBMITTER: Brugnetti G 

PROVIDER: S-EPMC10601480 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature