Mechanically shaped 2-dimensional covalent organic frameworks
AssigneeUniversity of Central Florida Research Foundation, Inc.
InventorsFernando Javier Uribe-Romo, Demetrius Vazquez-Molina, James K. Harper
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Abstract
Covalent organic frameworks (COFs) usually crystallize as insoluble powders and their processing for suitable devices has been thought to be limited. Here, it is demonstrated that COFs can be mechanically pressed into shaped objects having anisotropic ordering with preferred orientation between the hk0 and 00l crystallographic planes. Pellets prepared from bulk COF powders impregnated with LiClO4 displayed room temperature conductivity up to 0.26 mS cm−1 and stability up to 10.0 V (vs. Li+/Li0). This outcome portends use of COFs as solid-state electrolytes in batteries.
Claims5
A compressed 2-dimensional covalent organic framework (COF) comprising crystallographically aligned sheets and pores impregnated with a lithium salt, wherein the COF comprises Li+ conduction, and wherein the covalent organic framework contains functional groups chosen from alkyl chains, oligo- and polyethers, fluorinated alkyl chains, alkyl chains containing anionic groups, alkyl chains containing sulfonate groups, alkyl chains containing carboxylate groups, imides, or anionic group, wherein the covalent organic framework comprises anisotropic ordering between hk0 and 00l crystallographic planes.
Dependencies are inferred from the claim text.