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Interface Design for High‐Performance All‐Solid‐State Lithium Batteries (in EN)

Journal Article · · Advanced Energy Materials
All‐solid‐state batteries suffer from high interface resistance and lithium dendrite growth leading to low Li plating/stripping Coulombic efficiency (CE) of <90% and low critical current density at high capacity. Here, in this work, both challenges are simultaneously addressed and the Li plating/stripping CE is significantly increased to 99.6% at 0.2 mA cm−2/0.2 mAh cm−2, and critical current density (CCD) of > 3.0 mA cm−2/3.0 mAh cm−2 by inserting a mixed ionic‐electronic conductive (MIEC) and lithiophobic LiF‐C‐Li3N‐Bi nanocomposite interlayer between Li6PS5Cl electrolyte and Li anode. The highly lithiophobic LiF‐C‐Li3N‐Bi interlayer with high ionic conductivity (10−5 S cm−1) and low electronic conductivity (3.4×10−7 S cm−1) enables Li to plate on the current collector (CC) surface rather than on Li6PS5Cl surface avoiding Li6PS5Cl electrolyte reduction. During initial Li plating on CC, Li penetrates into porous LiF‐C‐Li3N‐Bi interlayer and lithiates Bi nanoparticles into Li3Bi. The lithiophilic Li3Bi and Li3N nanoparticles in LiF‐C‐Li3N‐Li3Bi sub‐interlayer will move to CC along with plated Li, forming LiF‐C/Li3N‐Li3Bi lithiophobic/lithiophilic sublayer during the following Li stripping. This interlayer enables Co0.1Fe0.9S2/Li6PS5Cl/Li cell with an areal capacity of 1.4 mAh cm−2 to achieve a cycle life of >850 cycles at 150 mA g−1. The lithiophobic/lithiophilic interlayer enables solid‐state metal batteries to simultaneously achieve high energy and long cycle life.
Research Organization:
Univ. of California, San Diego, CA (United States); Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE; USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AR0000781; EE0008856
OSTI ID:
2575806
Alternate ID(s):
OSTI ID: 2267595
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 19 Vol. 14; ISSN 1614-6840; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
EN

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