Research Article

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2021, 14(5): 1382–1389

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https://doi.org/10.1007/s12274-020-3187-9

Multi-redox phenazine/non-oxidized graphene/cellulose nano hybrids as ultrathick cathodes for high-energy organic batteries

Youngjin Ham1, Vitalii Ri2, Jin Kim1, Yeoheung Yoon3, Jinho Lee1, Kisuk Kang4, Ki-Seok An3 (✉), Chunjoong Kim2 (✉), and Seokwoo Jeon1 (✉)

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1 Department of Materials Science and Engineering, Advanced Battery Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
2 Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
3 Thin Film Materials Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
4 Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea

Keywords: energy storage, organic electrodes, batteries, graphene, cellulose nanofibers
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  • Abstract
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Various redox-active organic molecules can serve as ideal electrode materials to realize sustainable energy storage systems. Yet, to be more appropriate for practical use, considerable architectural engineering of an ultrathick, high-loaded organic electrode with reliable electrochemical performance is of crucial importance. Here, by utilizing the synergetic effect of the non-covalent functionalization of highly conductive non-oxidized graphene flakes (NOGFs) and introduction of mechanically robust cellulose nanofiber (CNF)-intermingled structure, a very thick (≈ 1 mm), freestanding organic nanohybrid electrode which ensures the superiority in cycle stability and areal capacity is reported. The well-developed ion/electron pathways throughout the entire thickness and the enhanced kinetics of electrochemical reactions in the ultrathick 5,10-dihydro-5,10-dimethylphenazine/NOGF/CNF (DMPZ-NC) cathodes lead to the high areal energy of 9.4 mWh·cm−2 (= 864 Wh·kg−1 at 158 W·kg−1). This novel ultrathick electrode architecture provides a general platform for the development of the high-performance organic battery electrodes.
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Multi-redox phenazine/non-oxidized graphene/cellulose nano hybrids as ultrathick cathodes for high-energy organic batteries. Nano Res. 2021, 14(5): 1382–1389 https://doi.org/10.1007/s12274-020-3187-9

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