Congratulations to the research group Lihui Wang for accepting a paper from "Journal of Materials Chemistry A"! The topic of the thesis is "Effect of eutectic accelerator in selenium-doped sulfurized polyacrylonitrile for high performance room temperature sodium-sulfur batteries".

S@pPAN has very good lithium or sodium storage performance in ester electrolyte, but its electrochemical performance in ether electrolyte is not very good, indicating that the kinetic reaction of S@pPAN cathode material is still slow. For this reason, we choose selenium as the "eutectic accelerator" to improve the reaction kinetics of S@pPAN. Selenium as a "eutectic accelerator" is different from traditional accelerators. Selenium can form Se-S bonds with sulfur in S@pPAN and be uniformly dispersed in the PAN conductive framework at the molecular level. At the same time, selenium can also contribute during the reaction. A certain specific capacity. Therefore, we synthesized Se0.08S0.92@pPAN composite material and applied it in room temperature sodium-sulfur battery. The experimental results show that the doping of selenium can effectively improve the electronic conductivity and ion diffusion coefficient, while reducing the sodium ion diffusion barrier and reaction overpotential, effectively improving the reaction kinetics, room temperature sodium with Se0.08S0.92@pPAN as the cathode material Sulfur batteries show excellent cycle performance and rate performance in both ether and ester electrolytes.

https://pubs.rsc.org/en/Content/ArticleLanding/2019/TA/C9TA02831E#!divAbstract