A significantly improved polymer||Ni(OH)2 alkaline rechargeable battery using anthraquinone-based conjugated microporous polymer anode

Alkaline rechargeable batteries (ARBs) are predicted to be an attractive solution for large-scale electrochemical energy storage applications. However, their advancement is greatly hindered by the lack of high-performance and sustainable anode that can stably operate in less-corroding, low electrolyte concentration. Herein, we report first example polymer ARB able concentrate (1м potassium hydroxide [KOH]) due employment a robust anthraquinone-based conjugated microporous (IEP-11) as anode. The assembled IEP-11||Ni(OH)2 achieves high cell voltage (0.98 V), gravimetric/areal capacities (150 mAh/g/7.2 mAh/cm2 at 3.5 65 mg/cm2, respectively), long cycle life (22,730 cycles, 960 h, 75% capacity retention 20C), excellent rate performance (75 mAh/g 50C) temperature operativity −10 °C). Furthermore, capability, low-temperature ability prepare mass loading anodes, along with self-discharge improved compared conventional linear poly (anthraquinone sulfide) (PAQS) commonly used 10 м KOH. This overall not only far superior PAQS||Ni(OH)2 owing porous polymer's specific surface area, combined micro-/mesoporosity mechanically stable three-dimensional (3D) architecture PAQS, but also surpass most reported organic||nickel [Ni]/cobalt [Co]/manganese [Mn] alkaline (ARBs).