Tuning electrochemical properties of Ni–Co MOF/MWCNTs composite via electrolyte optimization
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Date
2026
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Abstract
In pursuit of global energy demand the advancement of effective and eco-friendly electrode material is needed. In
this study Ni–Co MOF/ MWCNTs composite was synthesized by solvothermal approach and was studied in
various electrolytes (6 M KOH, 6 M LiCl, and 1 M Na2SO4) and their assessment was done via electrochemical
approach using Cyclic Voltammetry (CV) for finding specific capacitance, Galvanostatic Charge Discharge (GCD)
for determining energy density and power density, and Electrochemical Impedance Spectroscopy (EIS) studies to
find solution and charge transfer resistance. GCD studies revealed the distinct behaviors based on ion properties,
with KOH showing the highest ionic conductivity and capacitance retention (87.3 % at 4 Ag 1). The specific
capacitances (F g 1), at 2 mVs 1, were 1157.4 (KOH), 1022.3 (LiCl), and 736.5 (Na2SO4). The energy density and
power density, at a current density of 0.5 A g 1, were 205.90 Wh kg 1 and 249.2 W kg 1, respectively (in 6 M
KOH). The capacitive retention of the composite Ni–Co MOF/MWCNT material is 87.3 % in 6 M KOH over
10,000 cycles The study align with sustainable development goals (SDG7), focused on affordable, clean energy
production and storage.