New families of materials that may potentially replace dominant carbon electrodes have emerged as a major research hotspot in the field of capacitive deionization (CDI). Here, we report a metal-organic framework (MOF)/polypyrrole (PPy) hybrid, in which conductive PPy nanotubes that are running through each MOF particle have the potential to increase the overall bulk electrical conductivity, thus promoting such a system as a good CDI electrode material. Consequently, the MOF/PPy hybrid shows a high desalination capacity of 11.34 mg g-1, which is amongst those of state-of-the-art CDI electrodes. Moreover, the MOF/PPy hybrid also shows a superior desalination performance for brackish water and good cycling stability, far exceeding typical carbon-based benchmarks. This is the first example of CDI electrodes derived from direct MOF-based materials, highlighting the potential of these hybrid systems as promising materials beyond traditional carbon electrodes.
Bibliographical noteFunding Information:
The work was jointly supported by the Fundamental Research Funds for the Central Universities (B18020057), and the grants from the National Natural Science Foundation of China (51879068, 41561134016), and the National Key Research and Development Program (2018YFC0407900). This work was also supported by the Australian Research Council (ARC) Future Fellow (FT150100479 and DE190101410). This work was performed in part at the Queensland node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano-and micro-fabrication facilities for Australia’s researchers.
© The Royal Society of Chemistry.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Process Chemistry and Technology
- Electrical and Electronic Engineering