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Schiff base polymers containing ferrocene and carbon nanotubes prepared by one-step synthesis method for supercapattery

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Abstract

Supercapattery has drawn attention due to its superior tip-discharge efficiency and high energy density without affecting the cycle stability compared to conventional batteries and supercapacitors (SCs). Redox-active porous organic polymers (POPs) are regarded as promising energy storage materials due to the presence of overlapped π-electron clouds between the stacked layers, conjugated backbone, and high-rate charge transfer channels. However, single POPs material has fewer electroactive sites resulting from the broad and ordered π-π stacking in the network structure, limiting their corresponding electrochemical performance. In the present paper, Schiff base polymers containing ferrocene (Fc) and carbon nanotubes (CNTs) were prepared by one pot synthesis method for high-performance supercapattery. The microstructure studies exhibit that the CNTs were combined with the amorphous Schiff base polymer backbone. Moreover, the charge storage mechanism was discussed in detail. The electrochemical properties studies present that the sample (SPOP-Fc0.4/CNTs-5) possess the maximal specific capacitance (201.3 mAh g−1) at 0.5 A g−1 and the excellent specific capacity retention (retaining 84.3% of initial capacitance after 5000 GCD cycles at the current density of 10 A g−1). The enhanced performance shown by SPOP-Fc0.4/CNTs-5 was attributed to the synergy produced by the redox behavior and conjugated backbone provided by SPOP, the doping of Fc, and high-speed ion transport channels provided by CNTs. To evaluate the practicability of electrode materials, the asymmetric supercapattery devices (ASC) were assembled in a configuration of the SPOP-Fc0.4/CNTs-5//activated carbon (AC). SPOP-Fc0.4/CNTs-5//AC delivered a superb energy density of 65.9 Wh kg−1 with a power density of 344.8 W kg−1 while remaining almost 73.6% of the specific capacitance even after 5000 continuous GCD cycles. These Schiff-based POPs with advanced electrochemical capabilities deliver a fresh solution for material selection in energy storage, present extensively apply prospects in energy storage field.

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Funding

This work was supported by the Open Foundation of the Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Land Resources (SXDJ2017-1), the Innovative Research Team for Science and Technology of Shaanxi Province (2022TD-04), the Foundation of Key Industrial Innovation Chain of Shaanxi Province (2022ZDLSF07-01), and the Open Foundation for National Engineering Laboratory of Mobile Source Pollution Emission Control Technology (NELMS2019B02).

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  1. Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Land and Resources of China, School of Water and Environment, Chang’an University, Xi’an, 710054, China

    Yukun Ma, Hui Zhao, Ronglu Shu & Wei Wang

  2. Key Laboratory of Subsurface Hydrology and Ecology in Arid Region, Ministry of Education, Chang’an University, Xi’an, 710054, China

    Yukun Ma, Hui Zhao, Ronglu Shu & Wei Wang

  3. Shaanxi Research Design Institute of Petroleum and Chemical Industry, Xi’an, 710054, China

    Cunshe Zhang

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  1. Yukun Ma
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Ma, Y., Zhao, H., Shu, R. et al. Schiff base polymers containing ferrocene and carbon nanotubes prepared by one-step synthesis method for supercapattery. J Solid State Electrochem 28, 197–212 (2024). https://doi.org/10.1007/s10008-023-05674-9

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