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High‐Capacity and Long‐Life Zinc Electrodeposition Enabled by a Self‐Healable and Desolvation Shield for Aqueous Zinc‐Ion Batteries
Ist Teil von
Angewandte Chemie International Edition, 2022-03, Vol.61 (10), p.e202114789-n/a
Auflage
International ed. in English
Ort / Verlag
Germany: Wiley Subscription Services, Inc
Erscheinungsjahr
2022
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Artificial interfaces can alleviate the side reactions and the formation of the metallic (e.g., Li, Na, and Zn) dendrites. However, the traditional ones always breakdown during the repeated plating/stripping and fail to regulate the electrodeposition behaviors of the electrodes. Herein, a self‐healable ion regulator (SIR) is designed as a desolvation shield to protect the Zn electrodes and guide the Zn electrodeposition. Benefiting from the intermolecular hydrogen bonds, SIR shows a superb capability to in situ repair the plating/stripping‐induced cracks. Besides, the results of theoretical calculations and electrochemical characterizations show that the coating reduces water molecules in the solvated sheath of hydrated Zn2+ and restrains the random Zn2+ diffusion on the Zn surface. Even with a coating layer of only 360 nm, the SIR‐modified Zn electrode exhibits excellent long‐term stability for >3500 h at 2 mAh cm−2 and >950 h at an ultrahigh areal capacity of 20 mAh cm−2.
A self‐healable and desolvation shield is designed as an artificial coating for aqueous Zn electrodes. This interface regulates the solvation sheath of hydrated Zn2+, restrains the random Zn2+ diffusion, and in‐situ repairs the plating/stripping‐induced cracks. By means of the coating, a long‐term cycling stability for >3500 h is achieved.