Highly Microporous Nitrogen-doped Carbon Synthesized from Azine-linked Covalent Organic Framework and its Supercapacitor Function

Gayoung Kim, Jun Yang, Naotoshi Nakashima, Tomohiro Shiraki

    Research output: Contribution to journalArticlepeer-review

    47 Citations (Scopus)

    Abstract

    Porous carbons with nitrogen-doped (N-doped) structures are promising materials for advanced energy conversion and storage applications, including supercapacitors and fuel cell catalysts. In this study, microporous N-doped carbon was successfully fabricated through carbonization of covalent organic frameworks (COFs) with an azine-linked two-dimensional molecular network (ACOF1). In the carbonized ACOF1, micropores with diameters smaller than 1 nm are selectively formed, and a high specific surface area (1596 cm2 g−1) is achieved. In addition, the highly porous structure with N-doped sites results in enhancement of the electrochemical capacitance. Detailed investigation for the micropore-forming process reveals that the formation of nitrogen gas during the thermal degradation of the azine bond contributes to the microporous structure formation. Therefore, the present direct carbonization approach using COFs allows the fabrication of microporous heteroatom-doped carbons, based on molecularly designed COFs, toward future electrochemical and energy applications.

    Original languageEnglish
    Pages (from-to)17504-17510
    Number of pages7
    JournalChemistry - A European Journal
    Volume23
    Issue number69
    DOIs
    Publication statusPublished - Dec 11 2017

    All Science Journal Classification (ASJC) codes

    • Catalysis
    • Organic Chemistry

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