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    Nanoscale Composition Tuning of Cobalt–Nickel Hydroxide Nanosheets for Multiredox Pseudocapacitors
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    • Ji-Hyun Cha
      Ji-Hyun Cha
      Department of Chemistry, Sungkyunkwan Advanced Institute of Nano Technology, Sungkyunkwan University, 2066 Seobu-Ro, Jan-gan-Gu, Suwon, Gyeonggi-do 16419, Republic of Korea
      More by Ji-Hyun Cha
    • Su-Jeong Kim
      Su-Jeong Kim
      Department of Chemistry, Sungkyunkwan Advanced Institute of Nano Technology, Sungkyunkwan University, 2066 Seobu-Ro, Jan-gan-Gu, Suwon, Gyeonggi-do 16419, Republic of Korea
      More by Su-Jeong Kim
    • Seonho Jung
      Seonho Jung
      Department of Chemistry, Sungkyunkwan Advanced Institute of Nano Technology, Sungkyunkwan University, 2066 Seobu-Ro, Jan-gan-Gu, Suwon, Gyeonggi-do 16419, Republic of Korea
      More by Seonho Jung
    • Duk-Young Jung*
      Duk-Young Jung
      Department of Chemistry, Sungkyunkwan Advanced Institute of Nano Technology, Sungkyunkwan University, 2066 Seobu-Ro, Jan-gan-Gu, Suwon, Gyeonggi-do 16419, Republic of Korea
      *Email: [email protected]
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      Orcidhttp://orcid.org/0000-0003-3152-6382
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    ACS Applied Energy Materials

    Cite this: ACS Appl. Energy Mater. 2020, 3, 4, 3854–3862
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    https://doi.org/10.1021/acsaem.0c00295
    Published March 17, 2020
    Copyright © 2020 American Chemical Society
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    Abstract

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    We demonstrate enhanced electrochemical performance through nanoscale composition tuning of cobalt–nickel hydroxide (Co–Ni(OH)2) films acting as the multiredox electrode for pseudocapacitors. Our electrodes were prepared using a two-step approach: bottom-up synthesis of Co–Ni(OH)2 nanosheet (NS) colloidal solutions and their immobilization on a metal foam substrate. Co–Ni(OH)2 NSs were synthesized by kinetically controlled vapor diffusion of ammonia into a metal precursor solution. A highly stable and chemically uniform Co–Ni(OH)2 NS colloid was synthesized in a liquid medium (water and formamide) to afford Co1–xNixOH2 NSs (0 < x < 1). Horizontally aligned Co–Ni(OH)2 NSs were directly immobilized on the nickel substrate using an electrophoretic deposition (EPD) method, and their electrochemical characteristics were investigated according to the Co/Ni molar ratio in the electrodes. Oxidation potentials of the electrode gradually shifted from 0.04 to 0.31 V with an increase in the Ni ratio of the metal hydroxide NS electrodes. Moreover, we successfully obtained the multiredox Co–Ni(OH)2 electrode by nanoscale composition tuning of Co–Ni(OH)2 NS films, which were accomplished by the preparation of a mixed colloidal solution. The nanoscale multicomposition Co–Ni(OH)2 NS film showed comprehensive redox behavior from the relative contributions of each Co–Ni(OH)2 having a different molar ratio of Co/Ni. Optimized multiredox Co–Ni(OH)2 NS electrodes exhibited a high rate capability of 92% at 50 A g–1 and good cycle stability with 90.5% after 1,000 cycles. This method offers a route to produce highly stable pseudocapacitor electrodes with a wide operating window.

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsaem.0c00295.

    • Experimental results of DLS, zeta potential, TG curve, EPMA, EA, ICP, SEM–EDS, IR spectra, and electrochemical properties of the Co–Ni(OH)2 thin-film electrodes (PDF)

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    Cited By

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    This article is cited by 12 publications.

    1. Yanan Zhu, Qingqing Wu, Lei Zeng, Qunfang Liang, Xuetang Xu, Fan Wang. NiCo Layered Double Hydroxide Nanoarrays Grown on an Etched Ni Foam Substrate for High-Performance Supercapacitor Electrode. Energy & Fuels 2023, 37 (8) , 6208-6219. https://doi.org/10.1021/acs.energyfuels.3c00315
    2. Kaicheng Luo, Junjun Zhang, Wei Chu, Hui Chen. Facile Fabrication of Nickel Aluminum Layered Double Hydroxide/Carbon Nanotube Electrodes Toward High-Performance Supercapacitors. ACS Omega 2020, 5 (38) , 24693-24699. https://doi.org/10.1021/acsomega.0c03283
    3. Pallavi Bhaktapralhad Jagdale, Sayali Ashok Patil, Arupjyoti Pathak, Mukaddar Sk, Ranjit Thapa, Amanda Sfeir, Sebastien Royer, Akshaya Kumar Samal, Manav Saxena. Unveiling the performance of ultrathin bimetallic Co x Ni 1− x (OH) 2 nanosheets for pseudocapacitors and oxygen evolution reaction. Journal of Materials Chemistry A 2025, 13 https://doi.org/10.1039/D4TA06846G
    4. Tabish Aftab, Osbel Almora, Josep Ferre‐Borrull, Lluis F. Marsal. 3D Nanostructured Electrodes Based on Anodic Alumina Templates for Stable Pseudocapacitors. physica status solidi (RRL) – Rapid Research Letters 2024, 18 (11) https://doi.org/10.1002/pssr.202400144
    5. Cheng Zhang, Nuo Chen, Miao Zhao, Wei Zhong, Wen-Juan Wu, Yong-can Jin. High-performance electrode materials of heteroatom-doped lignin-based carbon materials for supercapacitor applications. International Journal of Biological Macromolecules 2024, 273 , 133017. https://doi.org/10.1016/j.ijbiomac.2024.133017
    6. Asma Riaz, Fozia Shaheen, Manawwer Alam, Muhammad Tanveer, Qurat-ul Aain, Ghulam Nabi. Controlled transformations by Zn-doped Co(OH)2 dandelions as a novel electrode material for pseudocapacitors. Materials Science in Semiconductor Processing 2024, 176 , 108311. https://doi.org/10.1016/j.mssp.2024.108311
    7. Yongju Lee, Duk-Young Jung. Self-supporting electrodes of lithium aluminium oxide–carbon nanocomposites synthesized from dicarboxylate-intercalated layered double hydroxide for supercapacitors. Journal of Materials Chemistry A 2024, 9 https://doi.org/10.1039/D4TA05640J
    8. Xuebing Xu, Yang Song, Chaoquan Hu, Mingyuan Shao, Chang Li. Cobalt‐Nickel Ultrathin Hexagonal Nanosheets for High‐performance Asymmetric Supercapacitors. ChemElectroChem 2023, 10 (10) https://doi.org/10.1002/celc.202300023
    9. Xinpeng Huang, Yihan Zhu, Xuehua Yan, Wenjing Zhang, Zohreh Shahnavaz, Sutang Wu, Hao Chen, Jianmei Pan, Tie Li. Elm-like hierarchical microstructure promotes NiCoO2/GO/CF as a competitive candidate for supercapacitors and microwave absorbers. Materials Characterization 2023, 199 , 112801. https://doi.org/10.1016/j.matchar.2023.112801
    10. Glenn Quek, Brian Roehrich, Yude Su, Lior Sepunaru, Guillermo C. Bazan. Conjugated Polyelectrolytes: Underexplored Materials for Pseudocapacitive Energy Storage. Advanced Materials 2022, 34 (22) https://doi.org/10.1002/adma.202104206
    11. Houqiang Zhao, Jiemei Wang, Yanwei Sui, Fuxiang Wei, Jiqiu Qi, Qingkun Meng, Yaojian Ren, Yezeng He. Construction of layered C@MnNiCo–OH/Ni3S2 core–shell heterostructure with enhanced electrochemical performance for asymmetric supercapacitor. Journal of Materials Science: Materials in Electronics 2021, 32 (8) , 11145-11157. https://doi.org/10.1007/s10854-021-05780-2
    12. Yongju Lee, Ji-Hyun Cha, Duk-Young Jung. Lithium separation by growth of lithium aluminum layered double hydroxides on aluminum metal substrates. Solid State Sciences 2020, 110 , 106488. https://doi.org/10.1016/j.solidstatesciences.2020.106488
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    ACS Applied Energy Materials

    Cite this: ACS Appl. Energy Mater. 2020, 3, 4, 3854–3862
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsaem.0c00295
    Published March 17, 2020
    Copyright © 2020 American Chemical Society
    Request reuse permissions

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