Designing Anthraquinone-Based Conjugated Microporous Polymers with Dual-Ion Storage Behavior Towards High-Performance Lithium-Organic Batteries

Conjugated microporous polymers (CMPs) represent an attractive type of electrode materials for Li-organic batteries (LOBs) systems owing to their high capacity and structure stability in electrolytes. However, CMPs generally suffer from limited electronic conductivity and low output potential. Introduction of functional link-ages can endow CMPs with optimized properties besides the electroactive building moieties, which diversify CMPs with satisfying functions. Herein, we prepared two cross-linked anthraquinone-phenylamine CMPs (denoted as TNAQ and TPAQ) as cathodes to build a high-performance LOB. Significantly boosted activity is observed for TNAQ by inserting an arylamine linkage (-NH-) into the CMP skeleton. As expected, LOBs based on TNAQ electrode demonstrates a high discharge capacity of 231 mAh g-1 at 60 mA g-1, high output voltage of 3.7 V (vs Li/Li+), and a high-capacity retention of 81% over 300 cycles at 200 mA g-1, which exceed all anthraquinone-based CMPs electrodes of previously report in LOBs. Our study offers an interesting strategy for CMP-based cathode materials of high-performance advanced LOBs.