Two-dimensional metal-organic framework with perpendicular one-dimensional nano-channel as precise polysulfide sieves for highly efficient lithium-sulfur batteries

Zhi Chang, Yu Qiao, Jie Wang, Han Deng, Haoshen Zhou

研究成果: Article査読

抄録

Although they are regarded as one of the most promising energy storage devices, lithium-sulfur batteries still suffer from severe “shuttle effects”, which limit their further applications. In this work, a unique two-dimensional metal-organic framework with a small perpendicular one-dimensional channel (5.2 Å) was prepared and employed as a highly efficient ion sieve to suppress notorious “shuttle effects” in Li-S batteries. The thin but closely packed laminar-like 2D CuBDC sheets could effectively suppress the shuttle of polysulfides and cause facile transport kinetics of the lithium ions during cycling. Consequently, after use as a functional separator in an Li-S battery, a capacity of 830 mA h g−1at 1 C was obtained after a long cycling period of 1000 cycles. The excellent capacity of 795 mA h g−1could still be obtained when cycled at 0.5 C after 500 cycles under a high sulfur loading of 5.2 mg cm−2, suggesting the superb polysulfide sieving ability of 2D CuBDC sheets.

本文言語English
ページ(範囲)4870-4879
ページ数10
ジャーナルJournal of Materials Chemistry A
9
8
DOI
出版ステータスPublished - 2021 2 28
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 再生可能エネルギー、持続可能性、環境
  • 材料科学(全般)

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