Battery-type NiMoO4@NiMoS4 composite electrodes for high-performance supercapacitors

• Published in: Chemical papers Vol. 77; no. 11; pp. 6655 - 6667
• Main Authors: Lv, Xinrong, Min, Xiaoqin, Lin, Xiaoyun, Ni, Yongnian
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.11.2023; Springer Nature B.V
• Subjects: Biochemistry; Biotechnology; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Core-shell structure; Electrochemical analysis; Electrode materials; Electrodes; High temperature; Hydrothermal reactions; Industrial Chemistry/Chemical Engineering; Materials Science; Medicinal Chemistry; Metal foams; Molybdates; Nanocomposites; Nanorods; Nickel compounds; Original Paper; Supercapacitors; High-performance supercapacitors; nanocomposite; @NiMoS; Battery-type electrode materials; Core–shell structure; NiMoO
• ISSN: 0366-6352; 1336-9075; 2585-7290
• DOI: 10.1007/s11696-023-02966-2

A novel NiMoO 4 @NiMoS 4 /NF nanocomposite is facilely grown on nickel foam (NF) via hydrothermal reaction and high-temperature calcination methods. The NiMoO 4 @NiMoS 4 /NF possesses a specific nanorods@nanosheets core–shell structure, greatly facilitating the transfer of electrons and ions. So, the NiMoO 4 @NiMoS 4 /NF shows excellent electrochemical performance. When a current density is 1 A g −1 , the specific capacity ( C p ) of NiMoO 4 @NiMoS 4 /NF reaches 1996 C g −1 , which is 7 times that of single NiMoO 4 /NF, and its C p is higher than the C p of other Ni-Mo-based electrode materials reported in the literatures. Moreover, the NiMoO 4 @NiMoS 4 /NF has a long cycling life, and its capacity retention rate reaches 83.1% after 5000 cycles at 20 A g −1 . The hybrid supercapacitor—NiMoO 4 @NiMoS 4 /NF-2//AC with NiMoO 4 @NiMoS 4 /NF as the positive electrode and AC as the negative electrode has an energy density of 32.75 Wh kg −1 and a power density of 725.09 W kg −1 . So the NiMoO 4 @NiMoS 4 /NF is a promising high-performance electrode material for battery-type hybrid supercapacitors.