An interactive design for sustainable oxygen capacity in alkali-ion batteries

Jaewoon Lee, Duho Kim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Nonhysteretic and reversible (nHR) oxygen redox is desirable for high-energy-density cathodes in lithium-ion batteries (LIBs); however, serious challenges remain. An interactive design concept that mimics the nHR anionic activity of Li-excess Na oxide for sodium-ion batteries is proposed herein to harness the full potential of the oxygen capacity of Li2MnO3 in LIBs. We investigated the reversible stacking sequence transition induced by layer gliding accompanied by oxygen redox during (de)sodiation in Na-layered oxides, with Li ions at the tetrahedral sites of the charged structure. Intriguingly, the stacking transition in F-doped Li2MnO3 was identified as a reversible reaction, and the delithiated phase exhibiting no O-O dimers included a consistent Li configuration of the Na cathode. Although in-plane Mn migration resulted in the formation of molecular O2 trapped in the bulk, the detailed electronic structures in the normal delithiation mode exhibited reversible lattice O(2p) activity.

Original languageEnglish
Pages (from-to)4554-4560
Number of pages7
JournalEnergy and Environmental Science
Volume15
Issue number11
DOIs
Publication statusPublished - 30 Sept 2022

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© 2022 The Royal Society of Chemistry.

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