Polyimide-Coated Glass Microfiber as Polysulfide Perm-Selective Separator for High-Performance Lithium-Sulphur Batteries
, Kwansoo Yang 2, Hui-Ju Kang 1, Hyun Jin Hwang 1, Jong Chan Won 2,3, Yun Ho Kim 2,3,* and Young-Si Jun 1,*Round 1
Reviewer 1 Report
In this work, the authors improve substantially the lithium-sulfur batteries by preparing and using a functional separator, namely polyimide functionalized glass microfibers. The synthesis of the polyimide and the fabrication process is fairly simple and the results regarding the cycle stability and the specific capacity seem to be important and a high sulfur utilization efficiency is achieved.
Comments:
line 63: based on the redox couple: 16Li + S8 <-> 8Li2S " 152 Figure 1 can be simplified. Photos of the PI-GF are not necessary, same for GF and PI-GF. SEM images of PP compared to GF have to be discussed. The other parts of this figure have to be diwscussed. the reaction of PAA with a tertiary amine should be included in Figure 1 as actually it is the salt that will be coated, There are many sentences that are too long (for example line 26-31, 101-105 etc.) and have to be splitted for more clarity. I suggest the use of the more common spelling: sulphur, instead of the more American sulfur.
I suggested to the authors to shorten their sentences for more clarity.
Author Response
Attached please find our responses to the Reviewer 1's comments.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Authors carefully studied the ployimide coated glass microfibers as polysulfide seperator and they showed improved electrochemical properties
Following below minor revisions are needed and clarified
Authors repeated cycling studies of Fig.3b , sometimes depending on cell fabrication we can expect this type cycling behavior, my suggestion under identical current density and mass , please repeat the galvanostic cycling studies and see the reproducibilty Fig.5C, please mention the frequency limits in the impedance plots and also change y-axis to -ve and also mention what what impedance studies are taken , it would have nice authors shown before and after cycling the impedance plots please included the fitted capacitance and resisatnce values Introduction section to be improved by further by batteries reviews ex : chemical reviews 113(2013)5364
Author Response
Attached please find our responses to the Reviewer 2's comments.
Author Response File: Author Response.pdf
