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This content will become publicly available on July 2, 2019

Title: All-solid-state interpenetrating network polymer electrolytes for long cycle life of lithium metal batteries

A star-shape polymer of 3-armed poly(ethylene glycol) methyl ether methacrylate-co-glycidyl methacrylate copolymer (3PPEGM-co-GMA) was synthesized using an atom transfer radical polymerization (ATRP) technique. All-solid-state interpenetrating network polymer electrolytes (INSPEs) were fabricated by simultaneous reaction of 3PPEGM-co-GMA and bisphenol A diglycidyl ether (BPDE) with polyetherdiamine (ED2003) in the presence of lithium bis(trifluoromethane) sulfonamide (LiTFSI). The INSPEs exhibited ionic conductivities higher than 10 -5 S cm -1 at room temperature, a high oxidation stability of 4.5 vs. Li/Li + and remarkable stability towards lithium metal. Li metal batteries with LiFePO 4 as the cathode and INSPEs as the electrolyte cycled at a current rate of 0.1C at 60 °C showed a high initial discharge capacity of 156.2 mA h g -1 and a stable cycling performance over 200 cycles with a high coulombic efficiency of 99%. In conclusion, the results demonstrate that the interpenetrating network polymer electrolytes are promising electrolytes for next generation lithium-based batteries with high ionic conductivity, improved safety, and stable electrochemical performance.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ; ORCiD logo [2] ; ORCiD logo [4]
  1. Nanchang Hangkong Univ., Nanchang (China). School of Environmental and Chemical Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Science Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Science Division
  3. Nanchang Hangkong Univ., Nanchang (China). School of Environmental and Chemical Engineering
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Science Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 6; Journal Issue: 30; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE
OSTI Identifier:
1462867
Alternate Identifier(s):
OSTI ID: 1460879