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Regulating lithium deposition via electropolymerization of acrylonitrile in rechargeable lithium metal batteries

Journal Article · · Nano Energy
 [1];  [1];  [2];  [1];  [1];  [3];  [1];  [1]
  1. Univ. of California, Riverside, CA (United States)
  2. Univ. of California, Riverside, CA (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)

Here, we report acrylonitrile (AN) as an effective additive in carbonate-based electrolytes to enable uniform and dense lithium (Li) deposition and to improve the coulombic efficiency of Li metal anode. Our electrochemical, spectroscopic, and theoretical study reveal that AN is cathodically electropolymerized on the Li surface prior to the electrochemical decomposition of the electrolyte during Li deposition. The resultant polyacrylonitrile artificial solid electrolyte interphase enables uniform nucleation and growth of Li deposition with significantly reduced side reactions. The effectiveness of the AN additive is demonstrated in 0.4 Ah Li||LiNi0.6Mn0.2Co0.2O2 pouch cells (using 50-μm Li anode, 3 mAh cm-2 cathode areal capacity, and 4g Ah-1 electrolyte) with excellent cycle stability under realistic charge-discharge condition

Research Organization:
Argonne National Laboratory (ANL), Lemont, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; University of California, Riverside; National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357; AC02-05CH11231
OSTI ID:
1869707
Journal Information:
Nano Energy, Journal Name: Nano Energy Vol. 88; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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