Ceramics International, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 1, 2024
Language: Английский
ACS Applied Energy Materials, Journal Year: 2023, Volume and Issue: 6(20), P. 10585 - 10592
Published: Oct. 2, 2023
Zinc ion hybrid supercapacitors (ZIHSs) with low cost, high safety, and capacity density are considered reliable alternatives for future energy applications. However, the poor cycle reversibility of Zn metal anodes in aqueous electrolytes hinders their further practical application, mainly due to dendrite growth water-induced parasitic reactions. Herein, we have prepared a deep eutectic solvent (DES) by mixing ZnCl2 urea added very small amount water optimize utilization this DES as an electrolyte ZIHS. This has significantly suppressed side reactions ZIHS, resulting wide electrochemical stability window 2.3 V, maximum 255.4 Wh kg–1 at 127.7 mAh g–1, good cycling maintaining 79.5% after 3000 cycles, Coulombic efficiency been maintained over 99%.
Language: Английский
Citations
8
Current Opinion in Electrochemistry, Journal Year: 2024, Volume and Issue: 46, P. 101538 - 101538
Published: May 22, 2024
Language: Английский
Citations
2
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(38)
Published: July 31, 2024
Abstract Potassium imide salt (KCTFSI), featuring cyano (C≡N) and trifluoromethanesulfonyl (TFSI) branches, is reported for the first time as a promising electrolyte aqueous potassium‐ion batteries (KIBs). In contrast to limited solubility of symmetric KTFSI (1.5m), asymmetric KCTFSI achieves high saturation concentration 32.2m within “water‐in‐salt” region. Experimental theoretical studies reveal that remarkable enhancement associated with asymmetry CTFSI anions likely preferential formation contact‐ion pairs through C≡N coordination. The solution not only extends electrochemical stability window (3.80 V on Al) but also maintains liquid state at low temperatures (−15 °C) an extended period, in sharp immediate solidification potassium bis(fluorosulfonyl)imide (KFSI, 30m) trifluoromethanesulfonate (KOTF, 22m) solutions. Thanks its wide voltage supercooling behavior, demonstrates excellent compatibility perylene‐3,4,9,10‐tetracarboxylic diimide (PTCDI) anode KVPO 4 F (or K 2 Fe[Fe(CN) 6 ]·2H O) cathode over temperature range. For instance, full cells PTCDI/KCTFSI/KVPO exhibit reasonable cyclability average discharge 1.7 300 charge/discharge cycles −15 °C. it anticipated this work will inspire new designs hybrid electrolytes based advance realization viable KIBs.
Language: Английский
Citations
2
Chemistry - An Asian Journal, Journal Year: 2024, Volume and Issue: 19(22)
Published: Aug. 19, 2024
Abstract Aqueous zinc‐ion batteries have become a promising energy storage battery due to high theoretical specific capacity, abundant zinc resources and low cost. However, dendrite growth hydrogen evolution reaction limit their application. This study aims improve the cycling performance stability of aqueous by improving gel electrolyte. Polyacrylamide (PAM) is selected as base material electrolyte, which has good safety, but water retention Zn 2+ migration number, ionic conductivity PAM are low, affects long‐term battery. In response these problems, we optimized chemical cross‐linking method, formed an enhanced adding disodium citrate dihydrate (SC). Experimental results show that introduction appropriate amount SC in electrolyte can significantly its electrochemical performance. The symmetric achieved stable cycle more than 2100 hours at current density 0.5 mA cm −2 , mainly attributed inhibitory effect on reaction. provides new direction for development application flexible batteries.
Language: Английский
Citations
2
Ceramics International, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 1, 2024
Language: Английский
Citations
2