Pulsed Reverse Potential Electrodeposition of Carbon-Free Ni/NiO Nanocomposite Thin Film Electrode for Energy Storage Supercapacitor Electrodes
Round 1
Reviewer 1 Report
In this article, the authors report combined cyclic voltammetry and pulse reverse potential electrodeposition technique can be used to synthesize carbon-free Ni-NiO nanocomposite thin film supercapacitor electrode. The structural and morphological analyses have revealed the presence of crystalline phases of both Ni and NiO in the form of nanospheres of size ~ 50 nm, and the remarkable performance by delivering a high specific capacitance of 2000 Fg-1 at an applied current load of 1 Ag-1 and capacitance retention of 98.6 %, after over 800 cycles under a high current load of 20 Ag-1.
Generally speaking, the topic is interesting for the reader of the Journal of COATINGS. Most of the data shown in the figures also have due quality. However, there are several minor things that should be deal with before it could be published.
- Some figures in the supporting are the same as the figures in the manuscript. I think these supporting data should be merged into the manuscript.
- To substantiate the aforementioned increased electrochemical characteristics of the electrode, two figures are encouraged to support: (1) Nyquist plots recorded on the Ni/NiO coating and pristine electrode. (2) Polarization (I-V) curves of Ni/NiO coating and pristine electrode.
- Finally, I will strongly recommend the authors mention the bio-application of Ni/NiO in the introduction. It will attract more readers who using Ni/NiO for bio-research. Therefore, related articles are cheer to cite. (ex: doi.org/10.1021/acsabm.0c00249)
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Reviewer 2 Report
- How was the electrodeposition optimized? Was NiO conductive?
- Is it possible to change the size to have a better uniformity?
- How does the system decay? Slowly or suddenly? Can you discuss the degradation with some images and/or data?
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Reviewer 3 Report
The authors provide very simple data for generating the Ni-NiO nanocomposite film. However, it is not enough to fulfill the requirement of full paper. The authors should increase the parameter studies and analysis such as XPS. I would like not to recommend the publication in the present form.
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