Journal
JOURNAL OF ENERGY STORAGE
Volume 44, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2021.103364
Keywords
Nickel phosphides; Expanded graphite; Electrode materials; Supercapacitors; High-power; And energy density
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The electroless Ni-P coating on expanded graphite papers exhibits excellent electrochemical performance and durability, making it a promising electrode for supercapacitors. The prepared Ni-P/EG electrodes offer high specific capacitance, low cost, and eco-friendly features, showing potential for applications in portable electronics and wearable energy storage.
In this study, electroless nickel-phosphorus(Ni-P) coating is applied on expanded graphite(EG) papers with excellent electrochemical performances and served as supercapacitor electrodes in alkaline electrolytes. The porosities of Ni-P/EG electrode, measured by mercury intrusion, are compared to expanded graphite papers. It is noticed that the as-prepared ultra-thin, binder-free, eco-friendly, and low-cost Ni-P/EG electrodes can be precisely used as an electrode for supercapacitors and show outstanding performance, including a high specific capacitance of 625 F/g at 1A/g. This material is attained an excellent energy density of 81 Wh/kg at a power density of 1005 W/kg, superior durability with 100,2% retention after 5,000 cycles. The results show that the Ni-P/EG electrode can be used as next-generation advanced metal phosphides for applications in portable electronics, supercapacitors, and wearable energy storage.
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