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Title: Hydrogen bonds enhanced composite polymer electrolyte for high-voltage cathode of solid-state lithium battery

Journal Article · · Nano Energy
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  1. Beijing University of Technology (China)
  2. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing (China)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)

Polymer electrolyte is one of the important components for developing advanced solid-state lithium batteries (SSLBs). However, the narrow electrochemical stability window restricts the practical application with high-voltage cathodes. In this study, a series of composite solid electrolytes (CSEs), possessing both wide electrochemical stability window (up to 5.0 V vs. Li+ /Li) and high ionic conductivity (over 1.35×10-3 S/cm at 25 °C), were reported by integrating SiO2 nanoparticles into poly(vinyl ethylene carbonate) polymer electrolyte. The enhanced anti-oxidation performances are mainly caused and confirmed by the local intermolecular interactions of hydrogen bonds in CSE. Based on this CSE, the SSLBs with LiCoO2 cathode present good cycle stability at high voltage, and the capacity retention with 4.5 V cut-off voltage is about 94% after 200 cycles. This work not only proves the importance of intermolecular interactions in CSE, but also provides an effective method for achieving high-energy SSLBs with enhanced interface compatibility between polymer electrolyte and highvoltage cathodes

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Beijing Municipal Education Commission; Beijing Natural Science Foundation; China Postdoctoral Science Foundation; High-Grade Discipline Construction of Beijing; National Natural Science Foundation of China (NSFC); U.S.-China Clean Energy Research Center (CERC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office. Battery Materials Research (BMR) Program; Youth Beijing Scholars Program
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1879888
Journal Information:
Nano Energy, Journal Name: Nano Energy Vol. 96; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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