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

Angew Chem Int Ed Engl

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.

Published: October 2022

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 I as additive. The G4-I synergy could activate efficient polar I /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 at 2 A g , and retains over 70 % capacity after 600 cycles at 4 A g . The advances can also be readily generalized to other ethers/water hybrid electrolytes, showing the universality of the "cocktail optimized" electrolyte design strategy.

Download full-text PDF

Source
http://dx.doi.org/10.1002/anie.202212666DOI Listing

Publication Analysis

Top Keywords

"cocktail optimized"
8
optimized" electrolyte
8
boosting cathode
4
cathode activity
4
activity anode
4
anode stability
4
stability zn-s
4
zn-s batteries
4
batteries aqueous
4
aqueous media
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!