MOF-in-COF structures as Composite Quasi-Solid electrolytes Achieving Ultra High Ionic Conductivity and Lithium Transference Number
발표자
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초록
내용
Covalent organic framework(COF) materials have demonstrated significant potential as solid-state electrolytes(SSEs) in advanced energy storage systems due to their unique 1D channels that facilitate ion transport directly. However, C=N functional group in the COF structure hinders its effectiveness by allowing lithium ion storage. To address this issue, in this work, metal organic frameworks (MOFs) are additionally employed to control and optimize the properties of COF pores. This leads to the formation of a MOF-in-COF (MC) structure that can more effectively accommodate IL, creating an exceptionally effective pathway for lithium-ion transportation. The IL-incorporated MC (IL@MC) solid electrolyte displays a notably high ionic conductivity of 1.5×10−3 S cm−1 at room temperature and a lithium-ion transference number of 0.26 at 60°C. This performance improvement can be attributed to the functionalization of the COF pores with MOFs, which act as selective gates for transporting cations.