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Boosting Cathode Activity and Anode Stability of Zn-S Batteries in Aqueous Media Through Cosolvent-Catalyst Synergy.

Journal Article


Abstract


  • Aqueous Zn-S battery with high energy density represents a promising large-scale energy storage technology, but its application is severely hindered by the poor reversibility of both S cathode and Zn anode. Herein, we develop a "cocktail optimized" electrolyte containing tetraglyme (G4) and water as co-solvents and I2 as additive. The G4-I2 synergy could activate efficient polar I3 - /I- catalyst couple and shield the cathode from water, thus facilitating the conversion kinetics of S and suppressing the interfacial side reactions. Simultaneously, it could stabilize Zn anode by forming an organic-inorganic interphase upon cycling. With boosted electrodes reversibility, the Zn-S cell delivers a high capacity of 775 mAh g-1 at 2 A g-1 , and retains over 70 % capacity after 600 cycles at 4 A g-1 . The advances can also be readily generalized to other ethers/water hybrid electrolytes, showing the universality of the "cocktail optimized" electrolyte design strategy.

Publication Date


  • 2022

Citation


  • Yang, M., Yan, Z., Xiao, J., Xin, W., Zhang, L., Peng, H., . . . Zhu, Z. (2022). Boosting Cathode Activity and Anode Stability of Zn-S Batteries in Aqueous Media Through Cosolvent-Catalyst Synergy.. Angewandte Chemie (International ed. in English), e202212666. doi:10.1002/anie.202212666

Web Of Science Accession Number


Start Page


  • e202212666

Abstract


  • Aqueous Zn-S battery with high energy density represents a promising large-scale energy storage technology, but its application is severely hindered by the poor reversibility of both S cathode and Zn anode. Herein, we develop a "cocktail optimized" electrolyte containing tetraglyme (G4) and water as co-solvents and I2 as additive. The G4-I2 synergy could activate efficient polar I3 - /I- catalyst couple and shield the cathode from water, thus facilitating the conversion kinetics of S and suppressing the interfacial side reactions. Simultaneously, it could stabilize Zn anode by forming an organic-inorganic interphase upon cycling. With boosted electrodes reversibility, the Zn-S cell delivers a high capacity of 775 mAh g-1 at 2 A g-1 , and retains over 70 % capacity after 600 cycles at 4 A g-1 . The advances can also be readily generalized to other ethers/water hybrid electrolytes, showing the universality of the "cocktail optimized" electrolyte design strategy.

Publication Date


  • 2022

Citation


  • Yang, M., Yan, Z., Xiao, J., Xin, W., Zhang, L., Peng, H., . . . Zhu, Z. (2022). Boosting Cathode Activity and Anode Stability of Zn-S Batteries in Aqueous Media Through Cosolvent-Catalyst Synergy.. Angewandte Chemie (International ed. in English), e202212666. doi:10.1002/anie.202212666

Web Of Science Accession Number


Start Page


  • e202212666