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Flexible Quasi‐Solid‐State Composite Electrolyte Membrane Derived from a Metal‐Organic Framework for Lithium‐Metal Batteries
Author(s) -
Liu Li,
Sun Chunwen
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201902032
Subject(s) - electrolyte , materials science , anode , lithium (medication) , composite number , electrochemistry , ionic conductivity , membrane , chemical engineering , battery (electricity) , cathode , lithium vanadium phosphate battery , electrochemical window , inorganic chemistry , composite material , electrode , chemistry , medicine , biochemistry , power (physics) , physics , quantum mechanics , engineering , endocrinology
In this work, we developed a new kind of flexible Li‐ion conductor membrane consisting of poly(vinylidene fluoride‐co‐hexafluoropropylene) matrix and ionic liquid absorbed in metal‐organic framework (MOF) particles. This composite membrane facilitates a homogeneous Li‐ion flux and exhibits an excellent ionic conductivity of about 4.3×10 −4 S cm −1 at room temperature, a wide electrochemical window of 4.8 V ( vs . Li + /Li), as well as good thermal stability and flexibility. The quasi‐solid‐state lithium metal battery assembled with the composite electrolyte membrane, a Li metal anode, and a composite cathode shows low interface impedance and a reversible discharge capacity of 149 mAh g −1 within 300 cycles at 0.1 C. This new kind of quasi‐solid‐state electrolyte membrane is a promising candidate for solid‐state lithium‐metal batteries with a high energy density.