Oxygen Vacancies on Layered Niobic Acid That Weaken the Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries

Lingling Xu, Hongyang Zhao, Mingzi Sun, Bolong Huang, Jianwei Wang, Jiale Xia, Na Li, Dandan Yin, Meng Luo, Feng Luo, Yaping Du, Chunhua Yan

Research output: Journal article publicationReview articleAcademic researchpeer-review

55 Citations (Scopus)

Abstract

Oxygen vacancies are usually considered to be beneficial in catalytic conversion of polysulfides in lithium–sulfur batteries. Now it is demonstrated that the conversion of polysulfides was hindered by oxygen vacancies on ultrathin niobic acid. The inferior performance induced by the oxygen vacancy was mainly attributed to the decreased electric conductivity as well as the weakened adsorption of polysulfides on the catalyst surface. This work shows that the care should be taken when designing a new catalyst for the lithium–sulfur battery using a defect-engineering strategy.

Original languageEnglish
Pages (from-to)11491-11496
Number of pages6
JournalAngewandte Chemie - International Edition
Volume58
Issue number33
DOIs
Publication statusPublished - 12 Aug 2019

Keywords

  • catalytic conversion
  • electrochemistry
  • Li-S batteries
  • niobic acid
  • oxygen vacancies

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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