A polycarboxylic/ether composite polymer electrolyte via in situ UV-curing for all-solid-state lithium battery

A polycarboxylic/ether composite polymer electrolyte derived from two-arm monomer and polyethylene oxide (PEO) was in situ synthesized on the cathode. The composite electrolyte exhibits a high ionic conductivity of 3.6 × 10−5 S cm–1, high oxidation stability, excellent stability towards Li metal and makes Li/LiFePO4 present good cyclic and rate performance at 25°C.


Recommendation?
Accept with minor revision (please list in comments)

Comments to the Author(s)
In this manuscript, a composite polymer electrolyte generates on the cathode via in situ UVcuring and the ionic conductivity is increased by regulating the matrix structure. The composite electrolyte displays good electrochemical properties in the solid-state cells. It can be published after addressing the following minor issues. 1. More discussion about the interaction between PA2 and PEO should be given. 2. The authors claim that the good ionic conductivity of PA2-30%PEO is related to the lower crystallinity ( Figure S1). However, the PA2-10%PEO, possessing an amorphous property as shown in Figure S1, displays a low conductivity. The authors need to give more explanation. 3. The scan rate of LSV should be added.

Review form: Reviewer 2
Is the manuscript scientifically sound in its present form? No

Do you have any ethical concerns with this paper? No
Have you any concerns about statistical analyses in this paper? No

Recommendation? Reject
Comments to the Author(s) Novelty of electrolyte material is not very clear, as it is so common class of materials. Room temperature ionic conductivity is very low to expect good cell performance. In fact, moderate discharging capacity was observed only when charge-discharge rate was very low, and observed value at 1C was extremely low. This reviewer does not consider this results will be appreciated by the community.

Decision letter (RSOS-200598.R0)
We hope you are keeping well at this difficult and unusual time. We continue to value your support of the journal in these challenging circumstances. If Royal Society Open Science can assist you at all, please don't hesitate to let us know at the email address below.
Dear Dr Liu: Title: A polycarboxylic/ether composite polymer electrolyte via in situ UV-curing for all-solidstate lithium battery Manuscript ID: RSOS-200598 Thank you for your submission to Royal Society Open Science. The chemistry content of Royal Society Open Science is published in collaboration with the Royal Society of Chemistry.
The editor assigned to your manuscript has now received comments from reviewers. We would like you to revise your paper in accordance with the referee and Subject Editor suggestions which can be found below (not including confidential reports to the Editor). Please note this decision does not guarantee eventual acceptance.
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Once again, thank you for submitting your manuscript to Royal Society Open Science and I look forward to receiving your revision. If you have any questions at all, please do not hesitate to get in touch. ********************************************** RSC Associate Editor: Comments to the Author: I am concerned about the comment from the reviwer #2: "moderate discharging capacity was observed only when charge-discharge rate was very low". Please make a clear explanation regarding this point.

RSC Subject Editor:
Comments to the Author: (There are no comments.) ********************************************** Reviewers' Comments to Author: Reviewer: 1 Comments to the Author(s) In this manuscript, a composite polymer electrolyte generates on the cathode via in situ UVcuring and the ionic conductivity is increased by regulating the matrix structure. The composite electrolyte displays good electrochemical properties in the solid-state cells. It can be published after addressing the following minor issues. 1. More discussion about the interaction between PA2 and PEO should be given. 2. The authors claim that the good ionic conductivity of PA2-30%PEO is related to the lower crystallinity ( Figure S1). However, the PA2-10%PEO, possessing an amorphous property as shown in Figure S1, displays a low conductivity. The authors need to give more explanation. 3. The scan rate of LSV should be added.

Reviewer: 2
Comments to the Author(s) Novelty of electrolyte material is not very clear, as it is so common class of materials. Room temperature ionic conductivity is very low to expect good cell performance. In fact, moderate discharging capacity was observed only when charge-discharge rate was very low, and observed value at 1C was extremely low. This reviewer does not consider this results will be appreciated by the community. ********************************************** Author's Response to Decision Letter for (RSOS-200598.R0) See Appendix A.

Decision letter (RSOS-200598.R1)
We hope you are keeping well at this difficult and unusual time. We continue to value your support of the journal in these challenging circumstances. If Royal Society Open Science can assist you at all, please don't hesitate to let us know at the email address below.

Dear Dr Liu:
Title: A polycarboxylic/ether composite polymer electrolyte via in situ UV-curing for all-solidstate lithium battery Manuscript ID: RSOS-200598.R1 It is a pleasure to accept your manuscript in its current form for publication in Royal Society Open Science. The chemistry content of Royal Society Open Science is published in collaboration with the Royal Society of Chemistry.
The comments of the reviewer(s) who reviewed your manuscript are included at the end of this email.