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
作者单位E-mail
籍文娟 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 jiwj@sxnu.edu.cn 
王丹 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  
王国娇 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  
孙秀玲 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  
付云龙 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 yunlongfu@sxnu.edu.cn 
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·(H2O)8·(DMF)2,X=Zn、Co、Ni; H3TATB=4,4',4″-s-triazine-2,4,6-triyl-tribenzoic acid; DMF=NN-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,1 000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3 000次后比电容保持率约为70.0%,显示出较长的循环寿命。
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
基金项目: 国家自然科学青年基金(No.21601115)和山西省大学生创新项目(No.2020DCXM-033)资助。
Abstract: A series of X-MOF@GO composited with X-MOF (X6O(TATB)4(H+)2·(H2O)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 1 000 cycles indicating that GO doped Ni-MOF can boost the performance of MOFs materials effectively. A symmetrical capacitor 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 3 000 cycles.
Keywords: metal-organic framework  graphene oxide  composite materials  supercapacitors
投稿时间:2021-01-14 修订日期:2021-09-27
摘要点击次数:  1041
全文下载次数:  295
籍文娟,王丹,王国娇,孙秀玲,付云龙.同构MOFs复合氧化石墨烯电极材料构筑高性能超级电容器[J].无机化学学报,2021,37(11):1931-1942.
查看全文  查看/发表评论  下载PDF阅读器
Support information: