Complexion-induced Cu2+ coordinated phase separation PBI membrane for lithium metal batteries

Najeeb ur Rehman Lashari, Andleeb Mehmood, Arshad Hussain, Waseem Raza, Irfan Ahmed, Muhammad Asim Mushtaq, Lei Wei, Xingke Cai, Dongqing Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The uncontrolled dendritic lithium production issues and the highly reactive behavior of lithium with electrolytes has limited use of lithium metal batteries. Herein, we utilized a straightforward method of the Complexion-Induced Phase Separation (CIPS) to fabricate a Cu2+ coordinated polybenzimidazole (PBI) membrane for a lithium metal battery. CIPS offer improved control over the structure and composition of the membrane, potentially leading to improved selectivity in ion transport, enhancing the safety and longevity of the battery. The formation mechanism and influencing elements of PBI-Cu are analyzed through experimental analysis and density functional theory calculations (DFT). The PBI-Cu membrane is effective in facilitating reversible lithium stripping and plating processes, suppressing dendrite formation, and promoting stable long-term cycling. Notably, the PBI-Cu cell demonstrated stable cycling conditions for over 200 h at a very high current density of 4 mA cm−2. The impressive rate performance was also confirmed during Li//LiFePO4 full cell operation, where it maintained a stable capacity of 120 mAh g−1 for more than 300 cycles. This research provides an in-depth insight into membrane design and paves the way for its application in various other energy-related technologies.

Original languageEnglish
Article number235590
JournalJournal of Power Sources
Volume624
DOIs
StatePublished - 30 Dec 2024

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.

Keywords

  • CIPS
  • DFT
  • Dendrite
  • Lithium metal battery
  • Polybenzimidazole

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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