High-Capacity Zinc Anode with 96 % Utilization Rate Enabled by Solvation Structure Design.
Angew Chem Int Ed Engl
; 62(3): e202214966, 2023 Jan 16.
Article
in En
| MEDLINE
| ID: mdl-36334063
ABSTRACT
Aqueous zinc-ion batteries (AZBs) show promises for large-scale energy storage. However, the zinc utilization rate (ZUR) is generally low due to side reactions in the aqueous electrolyte caused by the active water molecules. Here, we design a novel solvation structure in the electrolyte by introduction of sulfolane (SL). Theoretical calculations, molecular dynamics simulations and experimental tests show that SL remodels the primary solvation shell of Zn2+ , which significantly reduces the side reactions of Zn anode and achieves high ZUR under large capacities. Specifically, the symmetric and asymmetric cells could achieve a maximum of â¼96 % ZUR at an areal capacity of 24â
mAh cm-2 . In a ZUR of â¼67 %, the developed Zn-V2 O5 full cell can be stably cycled for 500â
cycles with an energy density of 180â
Wh kg-1 and Zn-AC capacitor is stable for 5000â
cycles. This electrolyte structural engineering strategy provides new insight into achieving high ZUR of Zn anodes for high performance AZBs.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Angew Chem Int Ed Engl
Year:
2023
Document type:
Article
Affiliation country:
China