同构MOFs复合氧化石墨烯电极材料构筑高性能超级电容器  

High Performance Supercapacitors Constructed with Isomorphic MOFs Doped Graphene Oxide Electrode Materials

作　　者：籍文娟 王丹 王国娇 孙秀玲 付云龙[1] JI Wen-Juan;WANG Dan;WANG Guo-Jiao;SUN Xiu-Ling;FU Yun-Long(Key Laboratory of Magnetic Molecules&Magnetic Information Materials Ministry of Education,School of Chemical and Material Science,Shanxi Normal University,Taiyuan 030006,China)

机构地区：[1]山西师范大学化学与材料科学学院,磁性分子与磁信息材料重点实验室,太原030006

出　　处：《无机化学学报》2021年第11期1931-1942,共12页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学青年基金(No.21601115);山西省大学生创新项目(No.2020DCXM-033)资助。

摘　　要：在水热条件下一步自组装合成系列同构X-MOF(X6O(TATB)_(4)(H^(+))_(2)·(H_(2)O)_(8)·(DMF)_(2),X=Zn、Co、Ni;H3TATB=4,4',4″-s-triazine-2,4,6-triyl-tribenzoic acid;DMF=N,N-二甲基甲酰胺)和氧化石墨烯(GO)的复合材料(X-MOF@GO),并探究其作为超级电容器电极材料的电化学性能。通过X射线粉末衍射、X射线光电子能谱和扫描电子显微镜测试证明GO和MOFs复合成功。其中,性能最优的Ni-MOFs@1.5GO(GO的添加量为1.5 mL)的比电容高达694.8 F·g^(-1)(0.5 A·g^(-1)),约是Ni-MOF的2倍。电化学测试结果表明:复合材料X-MOF@1.0GO较其原MOF表现出更大的比电容和更好的倍率性能。在3.5 A·g^(-1)的电流密度下,1000次循环充放电后,Ni-MOFs@1.0GO仍保持初始比电容量的81.2%。与活性炭(AC)组装的非对称超级电容器Ni-MOF@1.5GO//AC的性能最优,其功率密度为754.3 W·kg^(-1)时,能量密度为15.4 Wh·kg^(-1),且循环3000次后比电容保持率约为70.0%,显示出较长的循环寿命。A series of X-MOF@GO composited with X-MOF(X_(6)O(TATB)_(4)(H^(+))_(2)·(H_(2)O)_(8)·(DMF)_(2),X=Zn,Co,Ni;H3TATB=4,4',4″-s-triazine-2,4,6-triyl-tribenzoic acid;DMF=N,N-dimethylformamide)and graphene oxide(GO)as supercapacitor electrode materials were synthesized by one-step self-assembly under hydrothermal conditions.X-ray powder diffraction,X-ray photoelectron spectroscopy and scanning electron microscopy showed that X-MOF@GO composites were successfully synthesized.Ni-MOF@1.5GO electrode with the best performance delivered a specific capacitance of 694.8 F·g^(-1)at 0.5 A·g^(-1).Moreover,the specific capacitance of Ni-MOF@1.5GO electrode was nearly twice of Ni-MOF,while the capacitance of Ni-MOFs@1.0GO retained about 81.2%after 1000 cycles indicating that GO doped Ni-MOF can boost the performance of MOFs materials effectively.A symmetrical capaci-tor based on Ni-MOF@1.5GO//AC(AC=activated carbon)electrode exhibited a high energy density of 754.3 W·kg^(-1)at power density of 15.4 Wh·kg^(-1),while the capacitance retention reached about 70.0%after 3000 cycles.

关 键 词：金属有机框架材料 氧化石墨烯 复合材料 超级电容器 

分 类 号：O646[理学—物理化学] TB332[理学—化学]