Engineering of Charge Density at the Anode/Electrolyte Interface for Long‐Life Zn Anode in Aqueous Zinc Ion Battery

• Published in: ChemSusChem Vol. 18; no. 1; pp. e202401251 - n/a
• Main Authors: Wu, Kai, Liu, Xiaoyu, Ning, Fanghua, Subhan, Sidra, Xie, Yihua, Lu, Shigang, Xia, Yongyao, Yi, Jin
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 02.01.2025
• Subjects: Aqueous zinc ion battery; Charge density; Corrosion; Density distribution; Electric charge; Electric double layer; Electric field; Electric fields; Electrolytes; Electrostatic interaction; Hydrogen evolution reactions; Interface stability; Interfacial charge density; Ion transport; Scale (corrosion); Zn anode; Interfacial charge density; Electric field; Zn anode; Electrostatic interaction; Aqueous zinc ion battery
• ISSN: 1864-5631; 1864-564X; 1864-564X
• DOI: 10.1002/cssc.202401251

The aqueous zinc ion battery emerges as the promising candidate applied in large‐scale energy storage system. However, Zn anode suffers from the issues including Zn dendrite, Hydrogen evolution reaction and corrosion. These challenges are primarily derived from the instability of anode/electrolyte interface, which is associated with the interfacial charge density distribution. In this context, the recent advancements concentrating on the strategies and mechanisms to regulate charge density at the Zn anode/electrolyte interface are summarized. Different characterization techniques for charge density distribution have been analysed, which can be applied to assess the interfacial zinc ion transport. Additionally, the charge density regulations at the Zn anode/electrolyte interface are discussed, elucidating their roles in modulating electrostatic interactions, electric field, structure of solvated zinc ion and electric double layer, respectively. Finally, the perspectives and challenges on the further research are provided to establish the stable anode/electrolyte interface by focusing on charge density modifications, which is expected to facilitate the development of aqueous zinc ion battery. The engineering of charge density at the anode/electrolyte interface can regulate electrostatic interaction, interfacial electric field, the structure of the electric double layer, and the configuration of solvated zinc ions. These charge density adjustments stabilize the Zn anode/electrolyte interface, which can facilitate uniform zinc ion transport and suppress the hydrogen evolution reaction for long‐life Zn anode.