“…In particular, pyrene-4,5,9,10-tetraone (PTO) has been widely used among the organic-carbonyl-based cathode active materials in recent battery studies. ,, PTO has four carbonyl groups as electrochemical active sites, resulting in high theoretical specific capacity (409 mAh·g –1 ) and high redox capacity. However, the dissolution of PTO in common organic electrolyte causes a rapid decrease in capacity . In order to suppress dissolution in electrolytes, many strategies were applied, including PTO immobilization in (porous) carbons, , electrolyte optimization, changing polarity with introducing -CO 2 Li or -NO 2 groups (salt modifications), , and polymerization of PTO. − Modified PTO structures were employed in the designed cathode materials as the main chain, , side group, or covalent organic framework (COF)/covalent organic polymer(COP). ,, Although one of the most used techniques to cope with the dissolution problem is the polymer formation, to the best of our knowledge only one study was reported in which polymethacrylate as a linear organic polymeric chain bearing PTO units was synthesized that exhibited the remarkable charge–discharge properties as a Li-ion cathode material .…”