Journal
JOULE
Volume 1, Issue 2, Pages 344-358Publisher
CELL PRESS
DOI: 10.1016/j.joule.2017.08.012
Keywords
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Funding
- Nanostructures for Electrical Energy Storage (NEES)
- Energy Frontier Research Center (EFRC) - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DESC0001160]
- NIH [1S10RR23057]
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lonogels have recently attracted attention as pseudo-solid-state electrolytes based on their ability to confine an ionic liquid electrolyte within the mesoporous network of a sol-gel-derived inorganic matrix. Herein we report on the development of two important capabilities for ionogels. In one case, we incorporated spin-coated, 600-nm Li+-conducting ionogel films in electrochemical cells of LiFePO4/ionogel/Li. A key feature in this work is the ability to have the sol thoroughly penetrate the LiFePO4 electrode prior to gelation. Devices operating at C/2 achieved capacities of 125 mAh/g for some 150 cycles with minimal capacity loss. In the second case, we developed a UV crosslinking synthesis method and demonstrated photo-patterning of the ionogel. The realization of a photo-patterned pseudo-solid- state electrolyte increases the versatility of ionogels and potentially enables new fabrication routes for electrochemical device architectures.
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