Zeolitic imidazolate frameworks(ZIFs)and Prussian blue analogues(PBAs)are regarded as a subfamily of MOFs and possess great electrochemical characteristics,which are widely employed in energy and environmental applica...Zeolitic imidazolate frameworks(ZIFs)and Prussian blue analogues(PBAs)are regarded as a subfamily of MOFs and possess great electrochemical characteristics,which are widely employed in energy and environmental applications.Benefiting from the merits of these two MOFs,we report a simple ionexchange method to prepare ZIF-67/PBA heterostructure composites(abbreviated as ZP composites)with ZIF-67 and PBA as precursors.After low-temperature calcination,the structure converted into bimetallic N-doped dodecahedra that retained the structures of the ZP composites.The as-prepared ZP composites were utilized as electrode materials for supercapacitors that exhibited great rate capability and cycling stability.Furthermore,we assembled an asymmetric supercapacitor device with ZP composites and activated carbon.These results demonstrated that dual-MOF heterostructure composites showed great potential when applied as electrode materials.展开更多
基金supported by the National Natural Science Foundation of China(U1904215)the Natural Science Foundation of Jiangsu Province(BK20200044)+1 种基金the Changjiang Scholars Program of the Ministry of Education(Q2018270)the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘Zeolitic imidazolate frameworks(ZIFs)and Prussian blue analogues(PBAs)are regarded as a subfamily of MOFs and possess great electrochemical characteristics,which are widely employed in energy and environmental applications.Benefiting from the merits of these two MOFs,we report a simple ionexchange method to prepare ZIF-67/PBA heterostructure composites(abbreviated as ZP composites)with ZIF-67 and PBA as precursors.After low-temperature calcination,the structure converted into bimetallic N-doped dodecahedra that retained the structures of the ZP composites.The as-prepared ZP composites were utilized as electrode materials for supercapacitors that exhibited great rate capability and cycling stability.Furthermore,we assembled an asymmetric supercapacitor device with ZP composites and activated carbon.These results demonstrated that dual-MOF heterostructure composites showed great potential when applied as electrode materials.
