Charge-Transfer-Modulated Transparent Supercapacitor Using Multidentate Molecular Linker and Conductive Transparent Nanoparticle Assembly

Jimin Choi, Donghyeon Nam, Dongyeeb Shin, Youngkwon Song, Cheong Hoon Kwon, Ikjun Cho, Seung Woo Lee, Jinhan Cho

    Research output: Contribution to journalArticlepeer-review

    36 Citations (Scopus)

    Abstract

    One of the most critical issues in preparing high-performance transparent supercapacitors (TSCs) is to overcome the trade-off between areal capacitance and optical transmittance as well as that between areal capacitance and rate capability. Herein, we introduce a TSC with high areal capacitance, fast rate capability, and good optical transparency by minimizing the charge transfer resistance between pseudocapacitive nanoparticles (NPs) using molecular linker- and conductive NP-mediated layer-by-layer (LbL) assembly. For this study, bulky ligand-stabilized manganese oxide (MnO) and indium tin oxide (ITO) NP multilayers are LbL-assembled through a ligand exchange reaction between native ligands and small multidentate linkers (tricarballylic acid). The introduced molecular linker substantially decreases the separation distance between neighboring NPs, thereby reducing the contact resistance of electrodes. Moreover, the periodic insertion of ITO NPs into the MnO NP-based electrodes can lower the charge transfer resistance without a meaningful loss of transmittance, which can significantly improve the areal capacitance. The areal capacitances of the ITO NP-free electrode and the ITO NP-incorporated electrode are 24.6 mF cm-2 (at 61.6% transmittance) and 40.5 mF cm-2 (at 60.8%), respectively, which outperforms state of the art TSCs. Furthermore, we demonstrate a flexible symmetric solid-state TSC that exhibits scalable areal capacitance and optical transmittance.

    Original languageEnglish
    Pages (from-to)12719-12731
    Number of pages13
    JournalACS nano
    Volume13
    Issue number11
    DOIs
    Publication statusPublished - 2019 Nov 26

    Bibliographical note

    Publisher Copyright:
    © 2019 American Chemical Society.

    Keywords

    • charge transfer resistance
    • indium tin oxide nanoparticles
    • multidentate linker
    • multilayer
    • transparent supercapacitor

    ASJC Scopus subject areas

    • General Materials Science
    • General Engineering
    • General Physics and Astronomy

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