Ionic organic framework for all-solid-state secondary batteries, electrolyte containing the same, and all-solid-state secondary battery comprising the same

Polymer-Free Solid Electrolyte Using Protonated Triazine COFs and Counter-Anion Exchange

This technology creates crystalline organic frameworks (COFs) through the condensation of nitrogen- or phosphorus-containing aromatic compounds. It then introduces various counter-anions into the cationic sites formed by protonation within the framework to tune ionic conductivity and structural properties.

Conventional polymer-based solid electrolytes suffer from complex manufacturing processes and difficulties in precisely controlling ionic properties such as conductivity. Furthermore, their low structural stability limits their reliability as electrolytes.

This technology utilizes polymer-free crystalline ionic organic frameworks (iCOFs). By condensing cyanuric chloride with 2,6-diaminopyridine or imidazole to form the framework, and then mixing it with metal salts containing counter-anions such as Cl, BF4, PF6, or Tf2N, lithium-ion conductivity is optimized. It can be applied as a solid electrolyte for all-solid-state lithium secondary batteries or as an ion-conductive additive in electrodes, allowing for easy tuning of electrolyte properties simply by changing the anion type.

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Key Features:

• Compounds containing nitrogen or phosphorus in the framework that form cations upon protonation
• Crystalline ionic organic frameworks with counter-anions for secondary batteries, bonded to cations formed by protonation
• Organic framework structures formed by the condensation of triazine with three or more condensation functional groups and pyridine or imidazole
• The step of mixing the reaction product of cyanuric chloride and 2,6-diaminopyridine with a metal salt of a counter-anion selected from Cl, BF4, PF6, or Tf2N

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This invention was developed with support from the Ministry of Science and ICT for photosensitive nanocluster artificial antibodies for multimodal cancer immunotherapy.

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