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Synthesis of the cathode and anode materials from discarded surgical masks for high-performance asymmetric supercapacitors

Discarded surgicalmask derived carbon (DSM-C) and NiO/DSM-C composites were synthesized and further assembled into asymmetric supercapacitors, demonstrating outstanding electrochemical performances. [Display omitted] •Green reuse of discarded surgicalmasks (DSM) and synthesis of electrode materials...

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Bibliographic Details
Published in:Journal of colloid and interface science 2021-12, Vol.603, p.157-164
Main Authors: Zhu, Zitong, Gao, Fan, Zhang, Zhihao, Zhuang, Qingru, Yu, Hao, Huang, Yongqing, Liu, Qingyun, Fu, Min
Format: Article
Language:English
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Summary:Discarded surgicalmask derived carbon (DSM-C) and NiO/DSM-C composites were synthesized and further assembled into asymmetric supercapacitors, demonstrating outstanding electrochemical performances. [Display omitted] •Green reuse of discarded surgicalmasks (DSM) and synthesis of electrode materials were accomplished simultaneously.•The excellent dispersion and small size of NiO in DSM-C guaranteed exceptional capacitive performances.•The NiO/DSM-C//DSM-C ASCs with low cost, durability and excellent performances were fabricated. Advanced carbon-based electrode materials derived from wastes are essential to high-performance supercapacitors due to their abundance and sustainability. In this work, we fabricate novel cathodes and anodes based on discarded surgicalmask-derived carbon (DSM-C). Discarded surgicalmasks are good candidates for carbon-based electrode materials due to their unique fibrous structure and simple composition compared to conventional biomass sources. Benefiting from the excellent electrical conductivity of DSM-C and abundant redox reactions from nickel oxide (NiO), the electrochemical performances of NiO/DSM-C composites have been greatly improved. Specifically, the DSM-C and NiO/DSM-C electrodes show high specific capacitances of 240 F g−1 and 496 F g−1 at 1 A g−1 respectively, and excellent rate capability. Moreover,asymmetric supercapacitors (ASCs) are assembled using DSM-C and NiO/DSM-C as anodes and cathodes, respectively. They deliver a high energy density of 57 Wh kg−1 at a power density of 702 W kg−1, accompanied by superior cycling stability (98.5% capacitance retention after 10,000 cycles). This work shows prospective applications of DSM-C as an electrode material for energy storage systems.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2021.06.075