Journal
CCS CHEMISTRY
Volume 3, Issue 3, Pages 1297-1305Publisher
CHINESE CHEMICAL SOC
DOI: 10.31635/ccschem.020.202000284
Keywords
redox-active; tetrazine; functionalized MOF; cathode material; lithium-oxygen battery
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Funding
- NSFC, China [21421001, 21531005, 21905142, 21671112]
- Program of Introducing Talents of Discipline to Universities, China [B18030]
- Natural Science Fund of Tianjin, China [19JCZDJC37200, 19JCQNJC02600]
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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.
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.
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