A Review of Recent Developments and Advanced Applications of High-Temperature Polymer Electrolyte Membranes for PEM Fuel Cells

Round 1

Reviewer 1 Report

The manuscript is revised based on the comments. Thus now it will be acceptable for publication in Energies.

Author Response

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Reviewer 2 Report

The authors have done a good job revising their manuscript and I am satisfied with the changes made by them. 

Author Response

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Reviewer 3 Report

The manuscript reported the current status, operating principles, and recent advances of HT-PEMs, as well as the recent developments, economic viability, technical challenges, and commercial prospects. The membrane family of PBI-based membranes for HT-PEMFCs are the primary point. Specific consideration has been paid to proton conductivity and fuel cell performance of PA-PBI-based membranes.

 

I consider the content of this manuscript will definitely meet the reading interests of the readers of the Energies journal. However, there are certain English spelling and grammar issues, and also the discussion and explanation should be further improved.

 

Therefore, I suggest giving a minor revision and the authors need to clarify some issues or supply some more experimental data.

 

My detailed comments can be found in a separate PDF file.

Comments for author File: Comments.pdf

Author Response

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Reviewer 4 Report

The review paper is well-drafted, needs few corrections to be accepted

1-The statement "The polymer electrolyte membrane in PEM fuel cells does only allow the protons to be transferred from the anode to the cathode side. The electrons would pass through the external wiring circuit connecting the anode and cathode." is not clear

The authors can say that " polymer electrolyte membrane is a protonic conductor and electronic insulator which is sandwiched between a pair of electrodes"

refer the paper

Jayakumar, A., 2018. An assessment on polymer electrolyte membrane fuel cell stack components. In Applied Physical Chemistry with Multidisciplinary Approaches (pp. 23-49). Apple Academic Press.

2-In 86- the authors can say that "direct ethanol fuel cells  and direct methanol fuel cells, are the sub-set of PEM fuel cell" instead of "types"

3-In 162- what do u mean by Alkaline hydroxide

4-In 364- change the term "force" to "energy"

5-In 384, the author states "PBI has been recorded to be used as"

is incomplete

6-To validate the statement in 689 "This phenomenon can be confirmed by TEM analysis." a TEM image can be added

7- A comprehensive proofreading is mandatory as well as kindly check the units

 

 

 

Author Response

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Author Response File: Author Response.docx