Regulation of Outer Solvation Shell Toward Superior Low‐Temperature Aqueous Zinc‐Ion Batteries

• DOI: 10.1002/adma.202207344
• Publication Date: 2022-09-30T07:36:13Z
• Authors: Qianyi Ma; Rui Gao; Yizhou Liu; Haozhen Dou; Yun Zheng; Tyler Or; Leixin Yang; Qingying Li; Qiao Cu; Renfei Feng; Zhen Zhang; Yihang Nie; Bohua Ren; Dan Luo; Xin Wang; Aiping Yu; Zhongwei Chen
• Keywords: Solvation shell

Abstract Aqueous Zn‐ion batteries are well regarded among a next‐generation energy‐storage technology due to their low cost and high safety. However, the unstable stripping/plating process leading severe dendrite growth under current density temperature impede practical application. Herein, it is demonstrated that addition of 2‐propanol can regulate outer solvation shell structure Zn 2+ by replacing water molecules establish “eutectic shell”, which provides strong affinity with (101) crystalline plane fast desolvation kinetics during plating process, rendering homogeneous deposition without formation. As result, anode exhibits promising cycle stability over 500 h an elevated 15 mA cm −2 depth discharge 51.2%. Furthermore, remarkable electrochemical performance achieved in 150 mAh Zn|V 2 O 5 pouch cell 1000 cycles at −20 °C. This work not only offers new strategy achieve excellent aqueous harsh conditions, but also reveals electrolyte designs be applied related energy storage conversion fields.