Title: In situ formation of polymer-inorganic solid-electrolyte interphase for stable polymeric solid-state lithium-metal batteries

Journal Article · · Chem
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [2];  [2]
  1. University of Maryland, College Park, MD (United States); OSTI
  2. University of Maryland, College Park, MD (United States)
  3. Army Research Laboratory, Adelphi, MD (United States)
+ Show Author Affiliations

Composite polymer electrolytes (CPEs) for solid-state Li-metal batteries (SSLBs) still suffer from gradually increased interface resistance and unconstrained Li-dendrite growth. Herein, we addressed the challenges by designing a LiF-rich inorganic solid-electrolyte interphase (SEI) through introducing a fluoride-salt-concentrated interlayer on CPE film. The rigid but flexible CPE helps accommodate the volume change of electrodes, while the polymeric highly concentrated electrolyte (PHCE) surface-layer regulates Li-ion flux due to the formation of a stable LiF-rich SEI via anion reduction. The designed CPE-PHCE presents enhanced ionic conductivity and high oxidation stability of >5.0 V (versus Li/Li+). Furthermore, it dramatically reduces the interfacial resistance and achieves a high critical current density of 4.5 mA cm–2. The SSLBs, fabricated with thin CPE-PHCE membranes (<100 μm) and Co-free LiNiO2 cathodes, exhibit exceptional electrochemical performance and long cycling stability. Lastly, this approach of SEI design can also be applied to other types of batteries.

Research Organization:
University of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0008202
OSTI ID:
1976954
Journal Information:
Chem, Journal Name: Chem Journal Issue: 11 Vol. 7; ISSN 2451-9294
Publisher:
Cell PressCopyright Statement
Country of Publication:
United States
Language:
English

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25 ENERGY STORAGE
Chemistry
composite polymer electrolyte
interfacial chemistry
lithium batteries
lithium dendrite
solid-electrolyte interphase