2023
DOI: 10.1002/anie.202307365
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In Situ Electrochemical Activation of Hydroxyl Polymer Cathode for High‐Performance Aqueous Zinc–Organic Batteries

Abstract: The slow reaction kinetics and structural instability of organic electrode materials limit the further performance improvement of aqueous zinc‐organic batteries. Herein, we have synthesized a Z‐folded hydroxyl polymer polytetrafluorohydroquinone (PTFHQ) with inert hydroxyl groups that could be partially oxidized to the active carbonyl groups through the in situ activation process and then undertake the storage/release of Zn2+. In the activated PTFHQ, the hydroxyl groups and S atoms enlarge the electronegativit… Show more

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Cited by 28 publications
(13 citation statements)
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“…Two pairs of voltage plateaus in GCD curves imply a consecutive redox process of OSs cathode (Figure 3a). The vibration bonds of C=O at 1690 cm −1 in FT‐IR spectra gradually weaken to disappear, along with the generation of C−O species at 1421 cm −1 (Figure 3b), interpreting the coordination interaction between carbonyl sites and ionic carriers during discharging [19] . In contrast, −NH− bonds are chemically inert for coupling BF 4 − anions due to the high redox energy barrier (Figure S21).…”
Section: Resultsmentioning
confidence: 99%
“…Two pairs of voltage plateaus in GCD curves imply a consecutive redox process of OSs cathode (Figure 3a). The vibration bonds of C=O at 1690 cm −1 in FT‐IR spectra gradually weaken to disappear, along with the generation of C−O species at 1421 cm −1 (Figure 3b), interpreting the coordination interaction between carbonyl sites and ionic carriers during discharging [19] . In contrast, −NH− bonds are chemically inert for coupling BF 4 − anions due to the high redox energy barrier (Figure S21).…”
Section: Resultsmentioning
confidence: 99%
“…The vibration bonds of C=O at 1690 cm À 1 in FT-IR spectra gradually weaken to disappear, along with the generation of CÀ O species at 1421 cm À 1 (Figure 3b), interpreting the coordination interaction between carbonyl sites and ionic carriers during discharging. [19] In contrast, À NHÀ bonds are chemically inert for coupling BF 4…”
Section: Methodsmentioning
confidence: 99%
“…[34] Besides, compared with organic small molecules, polymers also display enhanced anti-dissolution and structural robustness due to their covalent structures. [75] However, the twisted molecule chains and random folding traits of polymers often cause difficulties in full utilization of active redoxsites.…”
Section: Cycling Lifementioning
confidence: 99%