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In Situ Construction of Protective Films on Zn Metal Anodes via Natural Protein Additives Enabling High-Performance Zinc Ion Batteries.
- Source :
-
ACS nano [ACS Nano] 2022 Jul 26; Vol. 16 (7), pp. 11392-11404. Date of Electronic Publication: 2022 Jul 18. - Publication Year :
- 2022
-
Abstract
- The strong activity of water molecules causes a series of parasitic side reactions on Zn anodes in the aqueous electrolytes. Herein, we introduce silk fibroin (SF) as a multifunctional electrolyte additive for aqueous zinc-ion (Zn-ion) batteries. The secondary structure transformation of SF molecules from α-helices to random coils in the aqueous electrolytes allows them to break the hydrogen bond network among free water molecules and participate in Zn <superscript>2+</superscript> ion solvation structure. The SF molecules released from the [Zn(H <subscript>2</subscript> O) <subscript>4</subscript> (SF)] <superscript>2+</superscript> solvation sheath appear to be gradually adsorbed on the surface of Zn anodes and in situ form a hydrostable and self-healable protective film. This SF-based protective film not only shows strong Zn <superscript>2+</superscript> ion affinity to promote homogeneous Zn deposition but also has good insulating behavior to suppress parasitic reactions. Benefiting from these multifunctional advantages, the cycle life of the Zn||Zn symmetric cells reaches over 1600 h in SF-containing ZnSO <subscript>4</subscript> electrolytes. In addition, by adopting a potassium vanadate cathode, the full cell shows excellent cycling stability for 1000 cycles at 3 A g <superscript>-1</superscript> . The in situ construction of a protective film on the Zn anode from natural protein molecules provides an effective strategy to achieve high-performance Zn metal anodes for Zn-ion batteries.
- Subjects :
- Electric Power Supplies
Electrodes
Ions
Metals
Electrolytes
Water
Zinc
Fibroins
Subjects
Details
- Language :
- English
- ISSN :
- 1936-086X
- Volume :
- 16
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- ACS nano
- Publication Type :
- Academic Journal
- Accession number :
- 35848633
- Full Text :
- https://doi.org/10.1021/acsnano.2c05285