Metal organic framework (MOFs) is a kind of crystalline porous materials (such as porous sponge), with the highest huge specific surface area of more than 7000 square meters per gram, is expected to become the potential of electrode materials of electrochemical energy storage.At present, more than 20,000 MOF materials have been synthesized, but low conductivity severely limits its application in the field of energy storage.Pure MOF material directly used as electrode for energy storage is rarely reported.
Recently, the Chinese academy of sciences, fujian institute of material structure of the national key laboratory of structural chemistry Xu Gang group and functional nano structural design and assembly, Chinese academy of sciences key laboratory of the king to team cooperation, using conductive MOFs nanoarrays constructed as the electrode materials with high area of capacitance of symmetrical type solid super capacitor.
Solid super capacitor based on conductive MOFs nanoarrays showing the area of the capacitance as much as u F ~ 22 cm - 2, higher than most of the carbon materials (less than 10 mu F cm - 2), and even comparable with graphite alkenyl symmetrical solid super capacitor (25 u F cm - 18.9-2).
Compared with powder materials, such nanometer structure electrode can significantly reduce the system resistance and interfacial charge transfer resistance and effectively improve the charge transfer rate between the nanometer array and the electrolyte.The above structural advantages can greatly improve the overall performance of the device, especially the high multiplier capacitance.
It is important to note that on the synthesis, graphene is usually strict (strong acid, strong oxidant, and time-consuming), by contrast, conductive MOF material in the case of a slightly higher than the room temperature, several hours can be synthesized, simple and efficient.
The work is conductive MOF a breakthrough in the field of energy applications, for the future development of conductive MOF electrode Materials provides a good start, and published in the journal of Advanced Functional Materials, Advanced Functional Materials, 2017, DOI: 10.1002 / adfm. 201702067), to be voted in the magazine cover.The work is subject to the national natural science foundation (Nos. 51402293 2150 1173 and 21550110194) and the strategic pilot science and technology (B) project of the Chinese academy of sciences