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Hierarchical FexBi2−xS3 solid solutions for boosted supercapacitor performance

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Abstract

For the pursuit of high energy supercapacitors, the development of high performance pseudocapacitance or battery-type negative electrode material is urgently needed to make up for the capacity shortage of commercial electric double layer capacitor (EDLC) type materials. Herein, a porous and defect-rich FexBi2−xS3 solid solution structure is firstly constructed by employing Fe-doped Bi2O2CO3 porous nanosheets as a precursor, which presents dramatically increased energy storage performance than Bi2S3 and FeS2 phase. For the optimized FexBi2−xS3 solid solution (FeBiS-60%), the Fe solute is free and random dispersed in Bi2S3 framework, which can effectively modulate the electronic structure of Bi element and introduce rich-defect due to the existence of Fe(II). Meanwhile, the FeBiS-60%, constructed by pore nanosheets that are assembled by self-supported basic nanorod units, presents rich mesoporous channels for fast mass transfer and abundant active sites for promoting capacity performance. Therefore, a high capacitance of 832.8 F·g−1 at a current density of 1 A·g−1 is achieved by the FeBiS-60% electrode. Furthermore, a fabricated Ni3S2@Co3S4 (NCS)//FeBiS-60% hybrid supercapacitor device delivers an outstanding energy density of 85.33 Wh·kg−1 at the power density of 0.799 kW·kg−1, and ultra-long lifespan of remaining 86.7% initial capacitance after 8700 cycles.

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Acknowledgements

The authors acknowledge funding support from the National Natural Science Foundation of China (Nos. 52272222 and 52072197), Outstanding Youth Foundation of Shandong Province, China (No. ZR2019JQ14), University Youth Innovation Team of Shandong Province (Nos. 2019KJC004 and 202201010318), the Natural Science Foundation of Shandong Province, China (No. ZR2021MB061), Major Scientific and Technological Innovation Project (No. 2019JZZY020405), Taishan Scholar Young Talent Program (No. tsqn201909114), and Major Basic Research Program of Natural Science Foundation of Shandong Province under Grant (No. ZR2020ZD09).

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  1. Fengming Zhou and Xiaodong Wang contributed equally to this work.

Authors and Affiliations

  1. International Cooperation United Laboratory of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

    Fengming Zhou, Xiaodong Wang, Ruijie Jing, Xiaoyu Li, Qi Zhang, Zhenjiang Li, Zhenyu Xiao & Lei Wang

  2. Technology Innovation Center of Battery Safety and Energy Storage Technology, Qingdao, International Science and Technology Cooperation Base of Qingdao, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

    Ruijie Jing, Xiaoyu Li, Yunmei Du & Lei Wang

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  1. Fengming Zhou
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Zhou, F., Wang, X., Jing, R. et al. Hierarchical FexBi2−xS3 solid solutions for boosted supercapacitor performance. Nano Res. 17, 3997–4005 (2024). https://doi.org/10.1007/s12274-023-6243-4

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