journal article·2022-12-09

Effects of Methoxy Substituents in Contorted Polycyclic Aromatic Hydrocarbons for Pseudocapacitive Charge Storage

Jaehyun Park, Se Hun Joo, Minsung Kang, Ju Hyun Park, Bumjung Kim, Sang Kyu Kwak, Seokhoon Ahn, Seok Ju Kang

ACS Energy Letters· Volume 7· Issue 12
Publisher page

Abstract

We investigate the potential of a methoxy-group-coordinated contorted hexabenzocoronene (OCH3-cHBC) derivative as a promising pseudocapacitive Li-ion hosting organic electrode. By inserting a polar methoxy group at the end of each peripheral aromatic ring of cHBC, the strong negative electrostatic potential near the oxygen atom enabled us to modulate the pseudocapacitive characteristics of the OCH3-cHBC electrode with enhanced specific capacity. Particularly, benefiting from the electron-donating group, a Li-ion capacitor (LIC) consisting of an OCH3-cHBC anode with a double-layer capacitor cathode could be readily fabricated. It exhibited reliable energy and power densities as well as an ultralong lifetime of over 13000 cycles without significant degradation. The promising electrochemical results enriched the strategic molecular approach of polycyclic aromatic hydrocarbons, altering the electrochemical energy storage systems and ensuring advanced LIC electrodes.
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Research context

OpenAlex topics: Supercapacitor Materials and Fabrication · Conducting polymers and applications · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea

Center for Wave Energy Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea

Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeonbuk 55324, Republic of Korea

School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea

Department of Chemistry, New Jersey City University, Jersey City, New Jersey 07305, United States

Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea

Funding

National Research Foundation of Korea · Ministry of Knowledge Economy · Korea Institute of Science and Technology · Ministry of Science, ICT and Future Planning

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