Journal
CHEMICAL SCIENCE
Volume 6, Issue 10, Pages 5499-5505Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sc02052b
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Funding
- Center for Gas Separations Relevant to Clean Energy Technologies
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001015]
- Bosch through Bosch Energy Research Network (BERN) grant
- National Science Foundation (NSF) under Center for Sustainable Polymers [CHE-1413862]
- Arkema
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A new family of solid polymer electrolytes based upon anionic tetrakis(phenyl) borate tetrahedral nodes and linear bis-alkyne linkers is reported. Sonogashira polymerizations using tetrakis(4-iodophenyl) borate, tetrakis(4-iodo-2,3,5,6-tetrafluorophenyl) borate and tetrakis(4-bromo-2,3,5,6-tetrafluorophenyl) borate delivered highly cross-linked polymer networks with both 1,4-diethynylbeznene and a tri(ethylene glycol) substituted derivative. Promising initial conductivity metrics have been observed, including high room temperature conductivities (up to 2.7 x 10(-4) S cm(-1)), moderate activation energies (0.25-0.28 eV), and high lithium ion transport numbers (up to t(Li+) = 0.93). Initial investigations into the effects of important materials parameters such as bulk morphology, porosity, fluorination, and other chemical modification, provide starting design parameters for further development of this new class of solid electrolytes.
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