Fabricating better metal-organic frameworks separators for Li–S batteries: Pore sizes effects inspired channel modification strategy

Zhi Chang, Yu Qiao*, Jie Wang, Han Deng, Ping He, Haoshen Zhou

*この研究の対応する著者

研究成果: Article査読

30 被引用数 (Scopus)

抄録

More and more researchers have realized the pores within metal-organic frameworks (MOFs) can suppress polysulfides shuttling and improve the performance of Li–S batteries. However, neither the initial “sulfur loss”, nor the related exacerbated voltage polarizations have raised enough attentions. Herein, these issues have been rationally demonstrated by the interactions between polysulfides and metal sites inside MOFs pores, and the sluggish lithium ions transportation pathway which are closely related to metal sites and pore sizes within MOFs. Moreover, as a channel modification strategy, decorating MOF channels with negatively charged sulfonic polymer (NSP) can concurrently turn the charge environment of the MOF channels (by forming sulfurphobic interaction between polysulfides and NSP) and facilitate the transportation of lithium ions, resulting in greatly relieved initial “sulfur loss” and largely reduced voltage polarizations of Li–S batteries. Simultaneously narrow the MOF channels and turn the charge environment of the MOF channels reveled a win-win situation, which we anticipate will provide a rational design strategy for fabricating functional MOFs used as membranes and even solid electrolytes for various energy storage systems.

本文言語English
ページ(範囲)164-171
ページ数8
ジャーナルEnergy Storage Materials
25
DOI
出版ステータスPublished - 2020 3
外部発表はい

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • 材料科学(全般)
  • エネルギー工学および電力技術

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