ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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

Xinrong Lv, Xiaoqin Min, Xiaoyun Lin, and Yongnian Ni

College of Chemistry and Chemical Engineering, Nanchang University, Nanchang, China

E-mail: linxiaoyun@ncu.edu.cn

Received: 11 May 2023  Accepted: 7 July 2023

Abstract:

A novel NiMoO₄@NiMoS₄/NF nanocomposite is facilely grown on nickel foam (NF) via hydrothermal reaction and high-temperature calcination methods. The NiMoO₄@NiMoS₄/NF possesses a specific nanorods@nanosheets core–shell structure, greatly facilitating the transfer of electrons and ions. So, the NiMoO₄@NiMoS₄/NF shows excellent electrochemical performance. When a current density is 1 A g⁻¹, the specific capacity (C_p) of NiMoO₄@NiMoS₄/NF reaches 1996 C g⁻¹, which is 7 times that of single NiMoO₄/NF, and its C_p is higher than the C_p of other Ni-Mo-based electrode materials reported in the literatures. Moreover, the NiMoO₄@NiMoS₄/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—NiMoO₄@NiMoS₄/NF-2//AC with NiMoO₄@NiMoS₄/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 NiMoO₄@NiMoS₄/NF is a promising high-performance electrode material for battery-type hybrid supercapacitors.

Keywords: NiMoO4@NiMoS4 nanocomposite; Core–shell structure; High-performance supercapacitors; Battery-type electrode materials

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-02966-2

Chemical Papers 77 (11) 6655–6667 (2023)