1,2-萘醌-4-磺酸钠功能化石墨烯复合水凝胶的制备及其电化学性能  

Preparation and electrochemical properties of 1,2-naphthoquinone-4-sodium sulfonate functionalized graphene hydrogels

作　　者：朱震祥 赵昕[1,2] ZHU Zhenxiang;ZHAO Xin(a.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China;College of Materials Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620 [2]东华大学材料科学与工程学院,上海201620

出　　处：《东华大学学报（自然科学版）》2022年第2期30-39,47,共11页Journal of Donghua University(Natural Science)

摘　　要：以1,2-萘醌-4-磺酸钠(NQS)、氧化石墨烯(GO)、多孔氧化石墨烯(HGO)为原料,基于水热反应制备功能化石墨烯水凝胶(F-GH)和功能化多孔石墨烯水凝胶(F-HGH),通过调控NQS的添加量得到不同NQS负载量的F-GH。利用扫描电子显微镜、透射电子显微镜、X射线衍射仪等对材料的形貌与结构进行表征;通过循环伏安、恒流充放电等测试研究GH、F-GH和F-HGH的电化学性能。研究发现,NQS与GO的质量比为1∶1时F-GH的比电容最高,而HGO表面大量的纳米孔缩短了电解液离子的传输距离,进一步提高了F-HGH的电化学性能。F-HGH电极在电流密度1 A/g下质量比电容为445 F/g,在电流密度10 A/g下循环10 000圈后,比电容保持率高达94.2%。Functionalized graphene hydrogels(F-GH) and functionalized holey graphene hydrogels(F-HGH) were prepared by hydrothermal reaction using sodium 1,2-naphthoquinone-4-sodium sulfonate(NQS), graphene oxide(GO) and holey graphene oxide(HGO) as raw materials, and F-GH with different NQS loadings were obtained by regulating the addition of NQS. The morphology and structure of materials were characterized by scanning electron microscope, transmission electron microscope and X-ray diffraction. The electrochemical properties of GH, F-GH and F-HGH were investigated by cyclic voltammetry and constant current charge-discharge tests. It shows that the specific capacitance of F-GH is highest at the mass ratio of NQS to GO of 1∶1, and the large number of nanopores on the surface of HGO shortens the electrolyte ion transport distance, which further improves the electrochemical performance of F-HGH. The mass specific capacitance of F-HGH electrode is 445 F/g at a current density of 1 A/g, and after 10 000 cycles at a current density of 10 A/g, the specific capacitance of F-HGH has a high specific capacitance retention rate of 94.2%.

关 键 词：氧化石墨烯 功能化 水凝胶 1 2-萘醌-4-磺酸钠 电化学性能 超级电容器 

分 类 号：O633[理学—高分子化学]