Journal
NANO LETTERS
Volume 18, Issue 6, Pages 3829-3838Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b01111
Keywords
Lithium batteries; composite solid polymer electrolytes; ionic conductivity; ceramic-polymer interfaces; vertically aligned nanostructures
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Funding
- U.S. Department of Energy under the Battery Materials Research (BMR) Program
- U.S. Department of Energy under the Battery 500 Consortium
- National Science Funds of China [51472044]
- Program for New Century Excellent Talent in University [NCET-12-0098]
- China Scholarship Council
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Among all solid electrolytes, composite solid polymer electrolytes, comprised of polymer matrix and ceramic fillers, garner great interest due to the enhancement of ionic conductivity and mechanical properties derived from ceramic-polymer interactions. Here, we report a composite electrolyte with densely packed, vertically aligned, and continuous nanoscale ceramic-polymer interfaces, using surface-modified anodized aluminum oxide as the ceramic scaffold and poly(ethylene oxide) as the polymer matrix. The fast Li+ transport along the ceramic-polymer interfaces was proven experimentally for the first time, and an interfacial ionic conductivity higher than 10(-3) S/cm at 0 degrees C was predicted. The presented composite solid electrolyte achieved an ionic conductivity as high as 5.82 X 10(-4) S/cm at the electrode level. The vertically aligned interfacial structure in the composite electrolytes enables the viable application of the composite solid electrolyte with superior ionic conductivity and high hardness, allowing Li-Li cells to be cycled at a small polarization without Li dendrite penetration.
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