Facile Fabrication of MnCo2O4/NiO Flower-Like Nanostructure Composites with Improved Energy Storage Capacity for High-Performance Supercapacitors

Nanomaterials

Salem Alzahmi¹  ChanduV. V. Muralee Gopi²  Byung-Chun Choi³  IhabM. Obaidat⁴  HammadMueen Arbi⁴  Sangaraju Sambasivam⁴  Venkatesha Narayanaswamy⁴  Hee-Je Kim⁵  K.V. G. Raghavendra⁵  AnilKumar Yedluri⁵ 

[1] Department of Chemical & Petroleum Engineering, United Arab Emirates University, Al Ain 15551, United Arab Emirates;Department of Electrical Engineering, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates;Department of Physics, Pukyong National University, Busan 608737, Korea;Department of Physics, United Arab Emirates University, Al Ain 15551, United Arab Emirates;School of Electrical Engineering, Pusan National University, Busan 46241, Korea;

关键词: MnCo₂O₄/NiO;    electrode;    supercapacitor;    nanostructure;    chemical bath deposition;    specific capacity;   

DOI  :  10.3390/nano11061424

来源: DOAJ

【 摘 要 】

Over the past few decades, the application of new novel materials in energy storage system has seen excellent development. We report a novel MnCo₂O₄/NiO nanostructure prepared by a simplistic chemical bath deposition method and employed it as a binder free electrode in the supercapacitor. The synergistic attraction from a high density of active sites, better transportation of ion diffusion and super-most electrical transportation, which deliver boost electrochemical activities. X-ray diffraction, field-emission scanning electron microscopy, and X-ray photoelectron spectroscopy have been used to investigate the crystallinity, morphology, and elemental composition of the as-synthesized precursors, respectively. Cyclic voltammetry, galvanostatic charge/discharge, and electron impedance spectroscopy have been employed to investigate the electrochemical properties. The unique nanoparticle structures delivered additional well-organized pathways for the swift mobility of electrons and ions. The as-prepared binder-free MnCo₂O₄/NiO nanocomposite electrode has a high specific capacity of 453.3 C g⁻¹ at 1 Ag⁻¹, and an excellent cycling reliability of 91.89 percent even after 4000 cycles, which are significantly higher than bare MnCo₂O₄ and NiO electrodes. Finally, these results disclose that the as-fabricated MnCo₂O₄/NiO electrode could be a favored-like electrode material holds substantial potential and supreme option for efficient supercapacitor and their energy storage-related applications.

【 授权许可】

Unknown