A novel moss-like 3D Ni-MOF for high performance supercapacitor electrode material

• Published in: Journal of solid state chemistry Vol. 309; p. 122994
• Main Authors: Wang, Jia-Wei, Ma, Ying-Xia, Kang, Xiao-Ya, Yang, Hai-Jun, Liu, Bing-Lu, Li, Shu-Shu, Zhang, Xiao-Dan, Ran, Fen
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.05.2022
• Subjects: Electrode material; Moss-like; Nickel metal-organic frameworks; Supercapacitors; Nickel metal-organic frameworks; Supercapacitors; Electrode material; Moss-like
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2022.122994

Metal-organic framework (MOF) has great potential in the field of supercapacitors as electrode material due to its high specific surface area and unique structure. Herein, a series of nickel MOFs (Ni-MOFs) were fabricated by one-pot solvothermal method at different experimental conditions. The electrochemical properties of the Ni-MOFs as electrode materials can be tuned by adjusting the experimental conditions to regulate the structures. The result indicates that a novel moss-like three-dimensional (3D) Ni-MOF had the maximum specific capacity of 638 ​C ​g-1 at a current density of 0.5 ​A ​g-1. The asymmetric supercapacitor (ASC) assembled by using moss-like 3D Ni-MOF as the positive electrode and active carbon as the negative electrode exhibited a high energy density of 30.4 ​Wh kg-1 at power density of 407.4 ​W ​kg-1. The moss-like 3D Ni-MOF was synthesized by one-pot solvothermal method utilizing Ni(NO3)2·6H2O to provide metal central ions and PTA as the organic ligand. PTA in the solution had a large number of carboxyl groups, which could adsorb free Ni2+ by coordination bonds to promote the growth of Ni-MOF during the solvothermal reaction, and further fabricated a novel moss-like 3D Ni-MOF by self-assembly. [Display omitted] •A novel moss-like 3D Ni-MOF was synthesized by one-pot solvothermal method.•The moss-like 3D Ni-MOF possessed a high specific capacity of 638 ​C ​g-1.•The asymmetric moss-like 3D Ni-MOF.||AC device exhibited a high energy density of 30.4 ​Wh kg-1 at power density of 407.3 ​W ​kg-1.