Journal
NANO ENERGY
Volume 71, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2020.104600
Keywords
Polymer electrolyte; Nanocomposite; Lithium metal battery; Stretchable; Large electrochemical window
Categories
Funding
- National Natural Science Foundation of China [51802239, 51703081, 51802122, 51521001]
- Wuhan Applied Basic Research Project [2018010401011285]
- 4th Yellow Crane Talent Programme [08010004]
- Achievements Transformation Project of Academicians in Wuhan [2018010403011341]
- Science and Technology Research Project of Education Department of Hubei Province [B2017266]
- National Key Research and Development Program of China [2016YFA0202603]
- National Basic Research Program of China [2013CB934103]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- Natural Science Foundation of Hubei Province [2019CFA001]
- Fundamental Research Funds for the Central Universities [WUT: 2016III001, 2017III009, WUT: 2019IVB054, 2019III062JL]
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Solid-state electrolyte batteries are considered as one of the promising next generation power sources. A novel cross-linked nanocomposite polymer electrolyte (CNPE) based on poly (propylene oxide)-poly (ethylene oxide)poly (propylene oxide) triblock main chains and surface-modified SiO2 nanoparticles are prepared to establish a super flexible and stable polymer framework. The CNPE exhibits high ionic conductivity of 1.32 mS cm(-1) at 20 degrees C and its electrochemical stability window reaches up to 6.5 V (versus Li+/Li). The favorable Li deposition behavior provided by CNPE films is identified by the stripping/plating test at a current density of 2.4 mA cm(-2) for 1700 h. The CNPE films possess excellent mechanical stability (highly stretchable with ultimate elongation of 700%). Li/CNPE/LiFePO4 batteries deliver an initial discharge capacity of 160 mAh g(-1) at 0.2 C, which is 94.1% of the theoretic capacity, and maintain the high specific capacity of 148 mAh g(-1) at 0.5 C. This work provides a new approach toward designing high performance electrolyte for lithium metal batteries.
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