Nickel selenide nanorod arrays as an electrode material for lithium-ion batteries and supercapacitors

• Published in: Journal of energy storage 2022-09, Vol.53, p.105215, Article 105215
• Main Authors: Bekhit, Samah M., Mohamed, Saad G., Ghayad, Ibrahim M., Fayed, Moataz G., Metwally, W., Abdel-Karim, R., El-Raghy, S.M.
• Format: Article
• Language: English
• Subjects: Energy storage; Hybrid supercapacitor; Hydrothermal reaction; Lithium-ion battery; Nanorod arrays; NixSey
• ISSN: 2352-152X; 2352-1538
• DOI: 10.1016/j.est.2022.105215

The growing need for renewable energy and environmental concern has prompted extensive study into energy storage devices, especially batteries and supercapacitors and their electrode materials. Nano array structures are among the most promising electrode structures for improving the electrochemical performance of energy storage devices. In this work, nanorod arrays of nickel selenide grown on nickel foam were synthesized via a simple one-step binder-free hydrothermal method. The change in morphology and electrochemical performance were studied due to altering reaction time. The nanorod growth mechanism and its electrochemical behavior were investigated. The optimum reaction time was 18 h giving nanorod arrays of NixSey with unique electrochemical performance when inspected as an active electrode material for both lithium-ion battery (LIB) and a supercapacitor (SC). For LIB, the as-prepared electrode gave an initial discharge capacity of 632.8 mAh g−1 with a good rate capability and coulombic efficiency. Meanwhile, as an SC electrode, it delivered a capacity of 426.5 C g−1 at 1 A g−1 in a three-electrode apparatus. The hybrid supercapacitor demonstrates 24.67 Wh kg−1 specific energy at 1020.83 W kg−1 specific power with remarkable cycle stability of 92.3 % after 9000 cycles. These results prove that nanorod arrays of NixSey are a promising electrode material for energy-storage applications. [Display omitted] •Nanorod arrays of NixSey were prepared via a one-step binder-free hydrothermal method. The growth mechanism was investigated.•For lithium-ion battery application, the NixSey nanorods electrode provided an initial discharge capacity of 632.8 mAh g-1.•NixSey 1D nanorods electrode exhibited a high specific capacity of 426.5 C g-1 for supercapacitors application.•The hybrid supercapacitor demonstrated specific energy of 24.67 Wh kg-1 at specific power of 1020.83 W kg-1.