Redox Donor–Acceptor Conjugated Microporous Polymers as Ultralong‐Lived Organic Anodes for Rechargeable Air Batteries
Linfeng Zhong, Zhengsong Fang, Chenhao Shu, Chunshao Mo, Xiaochuan Chen, Dingshan Yu
Abstract
Abstract Herein, we explore a new redox donor–acceptor conjugated microporous polymer (AQ‐CMP) by utilizing anthraquinone and benzene as linkers via C‐C linkages and demonstrate the first use of CMP as ultralong‐lived anodes for rechargeable air batteries. AQ‐CMP features an interconnected octupole network, which affords not only favorable electronic structure for enhanced electron transport and n‐doping activity compared to linear counterpart, but also high density of active sites for maximizing the formula‐weight‐based redox capability. This coupled with highly cross‐linked and porous structure endows AQ‐CMP with a specific capacity of 202 mAh g −1 (96 % of theoretical capacity) at 2 Ag −1 and ≈100 % capacity retention over 60000 charge/discharge cycles. The assembled CMP‐air full cell shows a stable and high capacity with full capacity recovery after only refreshing cathodes, while the decoupled electrolyte and cathode design boosts the discharge voltage and voltage efficiency to ≈1 V and 87.5 %.