Structural Evolution of Layered Manganese Oxysulfides during Reversible Electrochemical Lithium Insertion and Copper Extrusion.

ABSTRACT: The electrochemical lithiation and delithiation of the layered oxysulfide Sr₂MnO₂Cu_4-δS₃ has been investigated by using a combination of in situ powder X-ray diffraction and ex situ neutron powder diffraction, X-ray absorption and ⁷Li NMR spectroscopy, together with a range of electrochemical experiments. Sr₂MnO₂Cu_4-δS₃ consists of [Sr₂MnO₂] perovskite-type cationic layers alternating with highly defective antifluorite-type [Cu_4-δS₃] (δ ≈ 0.5) anionic layers. It undergoes a combined displacement/intercalation (CDI) mechanism on reaction with Li, where the inserted Li replaces Cu, forming Li₄S₃ slabs and Cu^+</

SUBMITTER: Dey S 

PROVIDER: S-EPMC8276577 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature