Defective 2D Covalent Organic Frameworks for Postfunctionalization

Zhen Li, Zhi Wei Liu, Zeyu Li, Tian Xiong Wang, Fulai Zhao, Xuesong Ding, Wei Feng, Bao Hang Han

Research output: Contribution to journalArticlepeer-review

113 Scopus citations

Abstract

Defects are deliberately introduced into covalent organic frameworks (COFs) via a three-component condensation strategy. The defective COFs (dCOF-NH2-Xs, X = 20, 40, and 60) possess favorable crystallinity and porosity, as well as have active amine functional groups as anchoring sites for further postfunctionalization. By introducing imidazolium functional groups onto the pore walls of COFs via the Schiff-base reaction, dCOF-ImBr-Xs- and dCOF-ImTFSI-Xs-based materials are employed as all-solid-state electrolytes for lithium-ion conduction with a wide range of working temperatures (from 303 to 423 K), and the ion conductivity of dCOF-ImTFSI-60-based electrolyte reaches 7.05 × 10−3 S cm−1 at 423 K. As far as it is known, it is the highest value for all polymeric crystalline porous material based all-solid-state electrolytes. Furthermore, Li/dCOF-ImTFSI-60@Li/LiFePO4 all-solid Li-ion battery displays satisfactory battery performance under 353 K. This work not only provides a new methodology to construct COFs with precisely controlled defects for postfunctionalization, but also makes them promising candidate materials as all-solid-state electrolytes for lithium-ion batteries operate at high temperatures.
Original languageEnglish (US)
JournalAdvanced Functional Materials
Volume30
Issue number10
DOIs
StatePublished - Mar 1 2020
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-09-20

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electronic, Optical and Magnetic Materials

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