Evaluation of the effect of precursor ratios on the electrochemical performances of binder-free NiMn-phosphate electrodes for supercapattery

Ong Gerard; S Ramesh; K Ramesh; Arshid Numan; Muhammad Norhaffis Mustafa; Mohammad Khalid; S Ramesh; S K Tiong

doi:10.1016/j.jcis.2024.04.101

Evaluation of the effect of precursor ratios on the electrochemical performances of binder-free NiMn-phosphate electrodes for supercapattery

J Colloid Interface Sci. 2024 Aug:667:585-596. doi: 10.1016/j.jcis.2024.04.101. Epub 2024 Apr 16.

Authors

Ong Gerard¹, S Ramesh², K Ramesh³, Arshid Numan⁴, Muhammad Norhaffis Mustafa⁵, Mohammad Khalid⁶, S Ramesh⁷, S K Tiong⁸

Affiliations

¹ Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Sustainable Energy, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor, Malaysia.
² Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia; Department of Chemistry, Saveetha School of Engineering, Institute of Medical and Technical Science, Saveetha University, Chennai 602105, Tamil Nadu, India. Electronic address: rameshtsubra@gmail.com.
³ Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
⁴ Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia. Electronic address: numan.arshed@yahoo.com.
⁵ Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia.
⁶ Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia; Uttaranchal University, Dehradun 248007, Uttarakhand, India; Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India.
⁷ Institute of Sustainable Energy, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor, Malaysia; Centre of Advanced Manufacturing and Material Processing, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
⁸ Institute of Sustainable Energy, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor, Malaysia. Electronic address: siehkiong@uniten.edu.my.

PMID: 38657542
DOI: 10.1016/j.jcis.2024.04.101

Abstract

Binary metal phosphate electrodes have been widely studied for energy storage applications due to the synergistic effects of two different transition elements that able to provide better conductivity and stability. Herein, the battery-type binder-free nickel-manganese phosphate (NiMn-phosphate) electrodes were fabricated with different Ni:Mn precursor ratios via microwave-assisted hydrothermal technique for 5 min at 90 °C. Overall, NiMn3P electrode (Ni:Mn = 1:3) showed an outstanding electrochemical performance, displaying the highest specific (areal) capacity at 3 A/g of 1262.4 C/g (0.44 C/cm²), and the smallest charge transfer resistance of 108.8 Ω. The enhanced performance of NiMn3P electrode can be ascribed to the fully grown amorphous nature and small-sized flake and flower structures of NiMn3P electrode material on the nickel foam (NF) surface. This configuration offered a higher number of active sites and a larger exposed area, facilitating efficient electrochemical reactions with the electrolyte. Consequently, the NiMn3P//AC electrode combination was chosen to further investigate its performance in supercapattery. The NiMn3P//AC supercapattery exhibited remarkable energy density of 105.4 Wh/kg and excellent cyclic stability with 84.7% retention after 3000 cycles. These findings underscored the superior electrochemical performance of the battery-type binder-free NiMn3P electrode, and highlight its potential for enhancing the overall performance of supercapattery.

Keywords: Battery-type; Binder-free electrode; Energy storage; Microwave-assisted hydrothermal; NiMn-Phosphate; Supercapattery.