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.

Publication Date

8-10-2016

Publication Title

Journal of the American Chemical Society

Volume

138

Issue

31

Number of Pages

9767-9770

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/jacs.6b05568

Socpus ID

84981541478 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84981541478

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