本研究首先製備硫/石墨烯複材，再以苯胺聚合披覆硫/石墨烯複材表面，形成聚苯胺披覆硫/石墨烯 (SGA)，接著藉由熱處理使硫與聚苯胺產生鍵結 (SGAh)，最後經由磺酸化反應得到磺酸化聚苯胺披覆硫/石墨烯複合材料 (SGAhP)。於鑑定方面，由IR可知聚苯胺與硫產生鍵結以及磺酸根成功地反應於聚苯胺上，由SEM可看出聚苯胺披覆之後的產物有表面型態改變，由四點探針量測導電度得知，有加入高導電度的石墨烯以及導電高分子聚苯胺的聚苯胺披覆硫/石墨烯複合材料較單純硫正極可以提升超過102倍導電度，最後可由XRD得知熱處理會造成聚苯胺與硫反應，改變硫的結晶性。使用CR2032鈕扣型電池對材料進行電化學測試，SGAhP正極在低放電速率100mA/g下的放電電容量為869 mAh/g，是硫正極放電電容量296 mAh/g的將近3倍。在充放電100圈後，熱處理後的SGA (即SGAh複合材)，因為升溫到300oC使聚苯胺與硫反應形成較穩定的結構，電容量還保有53.75%，而進一步在表面用磺酸根修飾的SGAhP正極更可以阻擋Sn2-的遷移，電容量更保有78.25%的高電容量維持率，相較於S的3.72%穩定很多，達到增加鋰硫電池循環壽命的效果。

Sulfonated-polyaniline coated sulfur/graphene composite was successfully prepared using aniline polymerization with sulfur/graphene (SGA), followed by thermal treatment (SGAh), which led to form C-S bonds between polyaniline and sulfur, and finally sulfonated on the polyaniline (SGAhP).The Sulfonated-polyaniline coated sulfur/graphene composite has been characterized with FTIR ane Raman, and the morphology of SGA SGAh, and SGAhP is observed by scanning electron microscopy. From four-point probe measurement, the SGA cathode provides relatively higher conductivity compared to the S cathode. In addition, the X-ray diffraction patterns show that the crystalline changed after thermal treatment.The electrochemical properties are tested using the CR2032 coin cell. The discharge capacity of the SGA cathode (689 mAh/g) is higher than the S cathode (296 mAh/g) under 100 mA/g current density. Furthermore, after 100 cycles, the SGAh enhances the capacity retention to 53.75% (SGA is 23.07%). Moreover, the SO3--coated SGAh (SGAhP) restricts polysulfide and shows the highest capacity retention up to 78.25%.

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