In:
Advanced Functional Materials, Wiley, Vol. 33, No. 40 ( 2023-10)
Abstract:
The Zn metal anode is subject to uncontrolled dendrites and parasitic reactions, which often require a big thickness of Zn foil, resulting in excess capacity and extremely low utilization. Here, an ultrathin Zn composite anode (24 µm) is developed with a protective hydrophobic layer (covalent (C 2 F 4 ) n chains and F‐doped carbonized ingredient) constructed on Cu foil (denoted as (C 2 F 4 ) n ‐C@Cu) as a host by one‐step pyrolytic evaporation deposition. The repulsion of (C 2 F 4 ) n to Zn 2+ makes the (C 2 F 4 ) n ‐C@Cu interface possess enhanced adsorption ability, driving more charge transfer under the layer. With its good hydrophobicity, this layer prevents H 2 O from damaging the plated Zn. Combined with the semi‐ionic‐state fluorine as zincophilic site, the host guides uniform and dense Zn deposition for making ultrathin Zn anode. As a result, the (C 2 F 4 ) n ‐C@Cu electrode exhibits high average CE of 99.6% over 3000 cycles at 2 mA cm −2 . Benchmarked against the commercial 20µm‐Zn foil, the (C 2 F 4 ) n ‐C@Cu@Zn anode achieves enhanced stability (1200 h at 1 mA cm −2 ), only 100 h for the 20µm‐Zn foil. When paired with V 2 O 5 cathode, the Zn composite anode makes the full cell deliver 88% retention for 2500 cycles.
Type of Medium:
Online Resource
ISSN:
1616-301X
,
1616-3028
DOI:
10.1002/adfm.202303466
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2029061-5
detail.hit.zdb_id:
2039420-2
SSG:
11
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