A low-overpotential, long-life, and “dendrite-free” lithium-O2 battery realized by integrating “iodide-redox-phobic” and “Li-ion-philic” membrane

Xiaohong Zou, Qian Lu, Cuie Wang, Sixuan She, Kaiming Liao, Ran Ran, Wei Zhou, Liang An, Zongping Shao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

Before the practical application of the Li–O2 battery (LOB), a critical issue regarding large overpotential upon charging (which causes irreversible side reactions and low energy efficiency) should be resolved. The utilization of redox mediators (RMs) which oxidatively decompose insulating discharge product, Li2O2, is one promising solution to address this issue. However, the soluble RMs can easily diffuse to and react with the Li metal anode (encountering Li dendrites is even worse). Here, a chemical self-assembly strategy is introduced into the fabrication of the iodide-redox-phobic and Li-ion-philic membrane for LOBs, in which the electronegative δ-MnO2 layer is in-situ grown on commercial polyethylene (PE) membrane (MnO2@PE). The electronegative MnO2 layer can simultaneously repel the shuttle of iodide species and regulate the uniform Li + deposition. Controlling cut-off capacity of 1000 mAh g−1, iodide-redox-based LOB with MnO2@PE demonstrates low overpotentials (∼0.7 V vs. Li+/Li), dendrite-suppressing capability, as well as impressive long-term reversibility over 500 cycles (2000 h), which urges the LOB technology competitive among the next-generation rechargeable power systems.

Original languageEnglish
Article number121112
JournalJournal of Membrane Science
Volume665
DOIs
Publication statusPublished - 5 Jan 2023

Keywords

  • Iodide-redox-phobic membrane
  • Li-ion-philic membrane
  • Li–O battery
  • Redox mediators
  • δ-MnO membrane

ASJC Scopus subject areas

  • Biochemistry
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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