The only Ni-foam was tested using different concentration of aqueous KOH electrolyte. The higher the concentration of KOH the longer the charge-discharge duration and larger the cyclic voltammetry area under the curve with larger separation between oxidation and reduction peaks. Anyone expert in the electrochemistry, kindly resolve the issue.
1. Higher Electrochemical Activity: KOH enables more efficient and reversible redox reactions on the nickel foam surface, enhancing energy storage and release.
2. Better Ionic Conductivity: KOH has higher ionic conductivity, allowing faster ion transport and more efficient charge transfer.
3. Improved Electrode Stability: The nickel foam forms a stable protective layer in KOH, which prolongs its durability and performance.
These factors together contribute to the extended charge-discharge cycles in KOH.
Thanks Hafsah Klfout for your answer. In addition to longer charge-discharge why Ni-foam shows lesser voltage window in KOH electrolyte?
The primary reason for Ni-foam's longer charge-discharge duration in aqueous KOH electrolyte compared to Na2SO4 is the higher ionic conductivity of KOH.
Why KOH has Higher Ionic Conductivity than Na2SO4:
The smaller voltage window observed for Ni-foam in KOH electrolyte compared to Na2SO4 is primarily due to the higher reactivity of the OH- ions in KOH.
Key Factors Contributing to the Smaller Voltage Window:
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