Synthesis of Three Dimensional Mo-Doped Nickel Sulfide Mesoporous Nanostructures/Ni Foam Composite for Supercapacitor and Overall Water Splitting

Songyang Li1

Jincheng Fan1,*,Email

Shidong Li1

Hongguang Jin1

Wenbin Luo1

Yong Ma2,*

Jianghong Wu1,3

Zisheng Chao,1,*,Email

Nithesh Naik4

Duo Pan5,6 

Zhanhu Guo5,*,Email

College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan, 410114, China

School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

College of Health Science and Environmental Engineering, Shenzhen Technology University, Shenzhen, Guangdong, 518118, China

Department of Mechanical & Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India

Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA

Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450001, China

Abstract

3D Mo-doped Ni3S2 mesoporous nanostructures on Ni foam were successfully synthesized via the solvothermal method, which showed the superior properties for energy storage and conversion. As an electrode for supercapacitor, 3D Mo-doped Ni3S2 mesoporous nanostructures demonstrated a 604.4 μAh cm-2 specific capacity and good cycling stability. Furthermore, Mo-doped Ni3S2 mesoporous nanostructures exhibited superior hydrogen evolution reaction and oxygen evolution reaction properties and good cycle stability for water splitting. At 1.41 V, the electrolyzer made up of Mo-doped Ni3S2 mesoporous nanostructures reached the 10 mA cm-2 catalytic current density, demonstrating outstanding long-term durability. Furthermore, the physical characterization results and mechanism of the 3D Mo-doped Ni3S2 were investigated. Therefore, the study presents the great promise of the 3D Mo-doped Ni3S2 mesoporous nanostructures in energy conversion and storage.