Foldable Solid-state Batteries Enabled by Electrolyte Mediation in Covalent Organic Frameworks
KAUST DepartmentDivision of Physical Science and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Saudi Arabia
Core Labs King Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Saudi Arabia
Advanced Membranes and Porous Materials Research Center
Chemical Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant NumberURF/1/3769-01
Embargo End Date2023-03-25
Permanent link to this recordhttp://hdl.handle.net/10754/676335
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AbstractSolid-state electrolytes with high Li<sup>+</sup> conductivity, flexibility, durability, and stability offer an attractive solution to enhance safety and energy density. However, meeting these stringent requirements poses challenges to the existing solid polymeric or ceramic electrolytes. Here, we present an electrolyte-mediated single-Li<sup>+</sup> conductive covalent organic framework (COF) that represents a new category of quality solid-state Li<sup>+</sup> conductors. In situ solidification of a tailored liquid electrolyte boosts the charge-carrier concentration in the COF channels, decouples Li<sup>+</sup> cations from both COF walls and molecular chains, and eliminates defects by crystal soldering. Such an altered micro-environment activates the motion of Li<sup>+</sup> ions in a directional manner, which leads to an increase in Li<sup>+</sup> conductivity by 100 times with a transference number of 0.85 achieved at room temperature. Moreover, the electrolyte conversion cements the ultrathin COF membrane with fortified mechanical toughness. With the COF membrane, foldable solid-state pouch cells are demonstrated
CitationGuo, D., Shinde, D. B., Shin, W., Abou-Hamad, E., Emwas, A., Lai, Z., & Manthiram, A. (2022). Foldable Solid-state Batteries Enabled by Electrolyte Mediation in Covalent Organic Frameworks. Advanced Materials, 2201410. Portico. https://doi.org/10.1002/adma.202201410
SponsorsSupported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering under award number DE-SC0005397. The synthesis and part of the characterization work were supported by the KAUST Competitive Fund URF/1/3769-01
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