Slightly Li-enriched chemistry enabling super stable LiNi_0.5Mn_0.5O₂ cathodes under extreme conditions.

ABSTRACT: High voltage/high temperature operation aggravates the risk of capacity attenuation and thermal runaway of layered oxide cathodes due to crystal degradation and interfacial instability. A combined strategy of bulk regulation and surface chemistry design is crucial to handle these issues. Here, we present a simultaneous Li₂WO₄-coated and gradient W-doped 0.98LiNi_0.5Mn_0.5O₂·0.02Li₂WO₄ cathode through modulating the content of the exotic dopant and stoichiometric lithium salt during lithiation calcination. Benefiting from the slightly Li-enriched chemistry induced by the hetero-epitaxially grown Li₂WO₄ surface, the 0.98LiNi_0.5Mn_0.5O₂·0.02Li₂WO₄

SUBMITTER: Chen S 

PROVIDER: S-EPMC11331316 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature