Title:Recycling the Spent Lithium-ion Battery into Nanocubes Cobalt Oxide
Supercapacitor Electrode
Volume: 20
Issue: 6
Author(s): Zinab Hassanien Bakr, Eslam Atef Abdelaziz Aboelazm, Cheng Seong Khe, Gomaa Abdelgawad Mohammed Ali*Kwok Feng Chong*
Affiliation:
- Chemistry Department, Faculty of Science, Al-Azhar University, Assiut, 71524, Egypt
- Nanomaterials for Energy and
Environment Laboratory (NEEL), Chemistry Department, Faculty of Science, Al-Azhar University, Assiut, 71524,
Egypt
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Gambang,
Kuantan, Pahang, 26300, Malaysia
Keywords:
Supercapacitor, Co-3O-4-NiO electrode, annealing, recycling, energy storage, LiBs, X-ray diffraction.
Abstract:
Background: Cobalt oxide nanocubes have garnered significant attention as potential
supercapacitor electrodes due to their unique structural and electrochemical properties. The
spent lithium-ion batteries (LiBs) are considered as zero-cost source for cobalt oxide production.
Objectives: The aim of this work is to recover cobalt oxide from spent LiBs and study its
electrochemical performance as a supercapacitor electrode material.
Methods: This study uses an electrodeposition method to obtain cobalt oxide honeycomb-like
anodes coated on Ni foam substrates from spent Li-ion batteries for supercapacitors applications.
The effect of annealing temperature on the cobalt oxide anode has been carefully investigated;
450ºC annealing temperature results in nanocubes on the surface of the cobalt oxide electrode.
X-ray diffraction confirmed the formation of the Co-3O-4-NiO electrode.
Results: The Co3O4-NiO nanocubes electrode has shown a high specific capacitance of 1400 F
g-1 at 1 A g-1 and high capacitance retention of ~96 % after 2250 cycles at a constant current
density of 10 A g-1 compared to 900 F g-1 at 1 A g-1 as for prepared Co3O4 honeycomb.
Conclusion: This strategy proves that the paramount importance of Co3O4-NiO nanocubes, meticulously
synthesized at elevated temperatures, as a supremely effective active material upon
deposition onto transition metal foam current collectors, establishing their indispensability for
supercapacitor applications.
