A novel sulfur-rich organic polymer S-dicyclopentadiene (S-DCPD) was obtained by ring-opening reaction of elemental sulfur (S8) at 185℃ followed by the coupling reaction with organic material dicyclopentadiene (DCPD).Characterization of NMR,Raman,XRD and XPS showed that the elemental sulfur was well grafted onto the host of DCPD.This method of fixing the elemental sulfur by chemical bond had alleviated the “shuttle effect” in lithium-sulfur batteries.A series of S-DCPD materials with different sulfur content were synthesized,among which the S-DCPD sample with the content of 60% sulfur exhibited the best comprehensive electrochemical performances,the coulombic efficiency exceeded 98%.
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基金资助
国家自然科学基金(51273027);江苏省精细石油化工重点实验室开放课题基金资助项目(KF2002)
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