Redox Donor–Acceptor Conjugated Microporous Polymers as Ultralong‐Lived Organic Anodes for Rechargeable Air Batteries

Abstract

Herein, we explore an ew redoxd onor-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, whichaffords 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 redoxc apability.T his coupled with highly cross-linked and porous structure endows AQ-CMP with as pecific capacity of 202 mAh g À1 (96 %o ft heoretical capacity) at 2Ag À1 and % 100 %capacity retention over 60000 charge/discharge cycles. The assembled CMP-air full cell shows as table and high capacity with full capacity recovery after only refreshing cathodes,w hile the decoupled electrolyte and cathode design boosts the dischargevoltage and voltage efficiency to % 1Vand 87.5 %.

Capturing Visible Light in Low‐Band‐Gap C4N‐Derived Responsive Bifunctional Air Electrodes for Solar Energy Conversion and Storage

“…[34] Due to the more negative redox potential of Redox-CMP than the O 2 /OH À couple potential (0.40 V), this polymer is ap romising organic anode for rechargeable polymer-air battery. [33][34][35] As exhibited in Figure 6c,d, the configuration and working mechanism of the proposed allpolymer air battery were quite similar to above-described VLS-RZAB except for the used electrolyte (6.0 MK OH). Notably,t he CB potential (À0.73 V) of C 4 Nw as lower than the electrode potential of Redox-CMP (À0.54 V), indicating that the sunlight can promoting the charging process of apolymer-air in theory.…”

“…Furthermore,a part from sunlight-promoted metal-air battery,w ea lso coupled our polymeric C 4 Ne lectrodes with apolymer anode to successfully construct the first example of an all-polymer VLS-RPAB,s uggesting the generality of our strategy and the versatile use of our C 4 Nelectrode.Aredoxactive conjugated microporous polymer (Redox-CMP) containing rich anthraquinone units was produced according to our previously reported method (Figure 6a;F igure S23). [33] Thee lectrochemical performance of the Redox-CMP was first examined likewise in 6.0 MK OH. Thecyclic voltammetry (CV) curve showed as ingle well-defined redox couple at E 1/2 = À0.54 V, implying good reversibility and electroactivity (Figure 6b).…”

“…0.22 Vd uring the first response upon illumination, indicating efficient harvesting and utilization of solar energy in RPAB which was coincident with the corresponding energy level diagram (Figure 6c). Notably,our invented VLS-RPAB represents the first example of all-polymer air battery prototype.A lthough metal-free polymers have been recognized as promising alternatives to conventional metal anodes for resolving unwanted dendritic issues, [33][34][35] the RPAB is still in its infancy. It is anticipated that our recent findings would stimulate the development of light-coupled polymer-air batteries.…”

Capturing Visible Light in Low‐Band‐Gap C4N‐Derived Responsive Bifunctional Air Electrodes for Solar Energy Conversion and Storage

“…The cyclic voltammetry (CV) curve showed a single well‐defined redox couple at E 1/2 =−0.54 V, implying good reversibility and electroactivity (Figure 6 b). [34] Due to the more negative redox potential of Redox‐CMP than the O 2 /OH − couple potential (0.40 V), this polymer is a promising organic anode for rechargeable polymer‐air battery [33–35] . As exhibited in Figure 6 c,d, the configuration and working mechanism of the proposed all‐polymer air battery were quite similar to above‐described VLS‐RZAB except for the used electrolyte (6.0 M KOH).…”

“…Furthermore, apart from sunlight‐promoted metal‐air battery, we also coupled our polymeric C 4 N electrodes with a polymer anode to successfully construct the first example of an all‐polymer VLS‐RPAB, suggesting the generality of our strategy and the versatile use of our C 4 N electrode. A redox‐active conjugated microporous polymer (Redox‐CMP) containing rich anthraquinone units was produced according to our previously reported method (Figure 6 a; Figure S23) [33] . The electrochemical performance of the Redox‐CMP was first examined likewise in 6.0 M KOH.…”