Ultrafast Microwave Polarizing Electrons to Form Vertically Aligned Metal Hybrids as Lithiophilic Buffer for Lithium-Metal Batteries

Xueyou Wang, Kui Xu, Longwei Ke, Qiao Zhang, Danqing Jin, Huan Shang, Kun Rui, Yan Yan, Huijuan Lin, Jixin Zhu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Lithium-metal batteries (LMBs) have attracted great attention because of their high theoretical capacity and low electrochemical potential. However, uncontrollable Li dendrite growth and significant volume expansion result in safety issues that largely limit their practical applications. Herein, we explore a microwave-assisted strategy for the rapid synthesis of vertically aligned metal hybrids on Cu foil (VAMH@CF). Such an elaborate architecture of VAMH provides a lithiophilic buffer layer after prelithiation, offering vast nucleation sites/seeds for Li deposition (Li@VAMH@CF) and lower nucleation overpotential. Consequently, Li@VAMH@CF exhibits an outstanding cyclability with a long lifespan (up to 5500 cycles) and a low voltage hysteresis (28 mV) in a symmetrical cell at 3 mA cm-2. LiFePO4||Li@VAMH@CF full cells deliver a reversible capacity of about 140 mAh g-1 for 200 cycles, further demonstrating opportunities of the microwave-involved strategy for optimizing Li-metal anodes.

Original languageEnglish
Pages (from-to)16594-16601
Number of pages8
JournalACS Applied Materials and Interfaces
Volume13
Issue number14
DOIs
StatePublished - 14 Apr 2021

Keywords

  • Li-metal battery
  • buffer layer
  • lithiophilic
  • metal hybrids
  • microwave-assisted

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