Electrode Materials with High Performance of Nickel Sulfide/Titanium Nitride@Co-Based Metal–Organic Frameworks/Nickel Foam for Supercapacitors

Naixuan Zong, Junli Wang, Zhenwei Liu, Song Wu, Xiaoning Tong, Qingxiang Kong, Ruidong Xu () and Linjing Yang ()
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Naixuan Zong: State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
Junli Wang: Researcher Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China
Zhenwei Liu: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Song Wu: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Xiaoning Tong: Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
Qingxiang Kong: State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
Ruidong Xu: State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China
Linjing Yang: State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China

Energies, 2024, vol. 17, issue 11, 1-16

Abstract: The metal–organic framework (MOF) materials with significant steadiness and a large specific surface area have been popular with supercapacitor material in recent years. However, its application in supercapacitors is restricted due to the low specific capacitance and poor conductivity. Herein, sulfur compounds with a high theoretical specific capacitance and highly conductive titanium nitride (TiN) were introduced into Co-based metal–organic frameworks/nickel foam (Co-MOF/NF) through a two-step hydrothermal technique (nickel sulfide/titanium nitride@ Co-based metal–organic frameworks/nickel foam). In detail, the fabricated nickel sulfide/titanium nitride@Co-based metal–organic frameworks/nickel foam (Ni 3 S 2 /TiN@Co-MOF/NF) electrode material exhibits a markedly high specific capacitance (2648.8 F g −1 ) at 1 A g −1 , compared with that (770 F g −1 ) of the precursor Co-MOF/NF. And its mass specific capacitance is retained 88.3% (8 A g −1 ) after 5000 cycles. Furthermore, a non-symmetrical supercapacitor (ASC) composed of Ni 3 S 2 /TiN@Co-MOF/NF and AC exhibits excellent power density (801.8 W kg −1 ) and energy density (97.8 W h kg −1 ). Therefore, Ni 3 S 2 /TiN@Co-MOF/NF with excellent electrochemical properties and stability provides new ideas for the development of excellent supercapacitor electrode materials.

Keywords: metal–organic framework materials; power density; two-step hydrothermal method; energy density; supercapacitor; specific capacitance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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