title: Mechanically Shaped Two-Dimensional Covalent Organic Frameworks Reveal Crystallographic Alignment and Fast Li-Ion Conductivity.
abstract: Covalent organic frameworks (COFs) usually crystallize as insoluble powders, and their processing for suitable devices is thought to be limited. We demonstrate that COFs can be mechanically pressed into shaped objects having anisotropic ordering with preferred orientation between hk0 and 00l crystallographic planes. Five COFs with different functionality and symmetry exhibited similar crystallographic behavior and remarkable stability, indicating the generality of this processing. Pellets prepared from bulk COF powders impregnated with LiClO4 displayed room temperature conductivity up to 0.26 mS cm(-1) and high electrochemical stability. This outcome portends use of COFs as solid-state electrolytes in batteries.
authors.affiliation: Department of Chemistry, University of Central Florida , 4111 Libra Drive, Orlando, Florida 32816, United States.
authors.forename: Demetrius A
authors.initials: DA
authors.lastname: Vazquez-Molina
authors.affiliation: Department of Chemistry, University of Central Florida , 4111 Libra Drive, Orlando, Florida 32816, United States.
authors.forename: Gavin S
authors.initials: GS
authors.lastname: Mohammad-Pour
authors.affiliation: Department of Chemistry and Biochemistry, University of California-Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States.
authors.forename: Chain
authors.initials: C
authors.lastname: Lee
authors.affiliation: Department of Chemistry, University of Central Florida , 4111 Libra Drive, Orlando, Florida 32816, United States.
authors.forename: Matthew W
authors.initials: MW
authors.lastname: Logan
authors.affiliation: Department of Chemistry and Biochemistry, University of California-Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States.
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Duan
authors.affiliation: Department of Chemistry, University of Central Florida , 4111 Libra Drive, Orlando, Florida 32816, United States.
authors.forename: James K
authors.initials: JK
authors.lastname: Harper
authors.affiliation: Department of Chemistry, University of Central Florida , 4111 Libra Drive, Orlando, Florida 32816, United States.
authors.forename: Fernando J
authors.initials: FJ
authors.lastname: Uribe-Romo