Porous polyimide framework based on perylene and triazine for reversible potassium-ion storage

A porous polyimide framework was prepared via condensation between perylenetetracarboxylic dianhydride and triazine and investigated as an electrode material for reversible K + -ion storage. It exhibited a large reversible capacity, good rate performance, and long cycling stability up to 1000 cycles at 5 A g −1 .