Selective Permeable Lithium-Ion Channels on Lithium Metal for Practical Lithium–Sulfur Pouch Cells

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Peng Yu Chen - , Tsinghua University (Autor:in)
  • Chong Yan - , Tsinghua University (Autor:in)
  • Pengyu Chen - , Tsinghua University (Autor:in)
  • Rui Zhang - , Tsinghua University, Beijing Institute of Technology (Autor:in)
  • Yu Xing Yao - , Tsinghua University (Autor:in)
  • Hong Jie Peng - , University of Electronic Science and Technology of China (Autor:in)
  • Li Tang Yan - , Tsinghua University (Autor:in)
  • Stefan Kaskel - , Professur für Anorganische Chemie (I) (AC1) (Autor:in)
  • Qiang Zhang - , Tsinghua University (Autor:in)

Abstract

Lithium metal batteries are considered a promising candidate for high-energy-density energy storage. However, the strong reducibility and high reactivity of lithium lead to low Coulombic efficiency when contacting oxidants, such as lithium polysulfide caused by the serious “shuttle effect” in lithium–sulfur batteries. Herein we design selectively permeable lithium-ion channels on lithium metal surface, which allow lithium ions to pass through by electrochemical overpotential, while the polysulfides are effectively blocked due to the much larger steric hindrance than lithium ions. The selective permeation of lithium ions through the channels is further elucidated by the molecular simulation and visualization experiment. Consequently, a prolonged cycle life of 75 cycles and high Coulombic efficiency of 99 % are achieved in a practical Li–S pouch cell with limited amounts of lithium and electrolyte, confirming the unique role the selective ion permeation plays in protecting highly reactive alkali metal anodes in working batteries.

Details

OriginalspracheEnglisch
Seiten (von - bis)18031-18036
Seitenumfang6
FachzeitschriftAngewandte Chemie - International Edition
Jahrgang60
Ausgabenummer33
PublikationsstatusVeröffentlicht - 9 Aug. 2021
Peer-Review-StatusJa

Externe IDs

PubMed 34058049

Schlagworte

ASJC Scopus Sachgebiete

Schlagwörter

  • lithium metal anode, lithium–sulfur batteries, polymer chains, pouch cell, selective permeable channels