Functionalizing MOF with Redox-Active Tetrazine Moiety for Improving the Performance as Cathode of Li-O-2 Batteries

A redox-active tetrazine moiety is immobilized within a metal-organic framework (MOF) aiming at targeted construction of a cathode with improved performance for lithium-oxygen batteries. A 1,2,4,5-tetrazine (Tz) functionalized ligand is used to construct a nanoporous MOF, Tz-Mg-MOF-74, in which the redox activity of the Tz moiety is retained. Combining the redox activity of Tz with the porous nature of a MOF produced a Tz-Mg-MOF-74-based cathode with significantly improved electrochemical performance. Specifically, the material has improved sustainable capacity with a lower overpotential compared with otherwise similar batteries without Tz and other reported MOF-based catalysts. The present approach productively integrates electrochemical activity derived from redox-active moieties and MOFs, and this combination opens a new avenue for the design of effectivematerials for energy storage and conversion.

Automated summary

By immobilizing a redox-active tetrazine moiety within a metal-organic framework, a cathode with improved performance for lithium-oxygen batteries was constructed. The combination of redox activity of tetrazine with the porous nature of the MOF resulted in a cathode with significantly improved electrochemical performance, providing a new avenue for the design of effective materials for energy storage and conversion.