Unraveling the Conversion Evolution on Solid-State Na-SeS₂ Battery via In Situ TEM.

ABSTRACT: All-solid-state (ASS) Na-S batteries are promising for a large-scale energy-storage system owing to numerous merits. However, the high conversion reaction barrier impedes their practical application. In this work, the basic mechanism on how Se catalyzes the conversion reaction in the Na-S batteries is unraveled. The sodiation/desodiation of Na-SeS₂ nanobatteries are systematically evaluated via in situ transmission electron microscopy (in situ TEM) with a microheating device. The real-time analyses reveal an amorphous Na-Se_x S_y intermediate phase appears during the direct conversion from SeS₂ to Na₂ S, and a reverse reaction succeeds at 100 °C with a prior formation of Se. The absence of polysulfides and a much lower desodiation temper

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC9109063 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature