Double Eutectic Electrolytes With Optimized Inner‐Outer Solvation Shell Engineering for Interphase‐Stabilized Zinc‐Metal Batteries
Abstract
Abstract Eutectic electrolytes (EEs) are promising for zinc‐metal batteries. However, traditional EEs suffer from high viscosity and severe ion migration hysteresis. Although hydration improves ion transport, it simultaneously intensifies corrosion‐related issues. Here, an original electrolyte system based on a double eutectic electrolyte (DEE) is proposed that employs strong Lewis acid‐base interactions in the inner solvation shell alongside a reconstructed hydrogen‐bonding network in the outer solvation shell, thereby achieving a good balance between ion transport kinetics and corrosion challenges. Moreover, the DEE modulates the electrochemical interface to form a stable and effective solid electrolyte interphase (SEI) layer, mitigating water corrosion and promoting uniform Zn deposition. Thus, symmetric cells based on the DEE demonstrate significantly extended cycle lives of 5900 h at 1 mA cm −2 , 1 mAh cm −2 with minimal voltage polarization, and maintain over 3300 h even at 4 mA cm −2 , 4 mAh cm −2 . The system also demonstrates outstanding performance at −20 °C, sustaining long‐term cycling up to 8000 h at 0.5 mA cm −2 . Furthermore, full cells with a low N/P ratio of 5.89 achieve stable cycling for 1000 cycles with 82.4% capacity retention, and pouch cells (mass loading: 103 mg) exhibit excellent durability over 2000 cycles at 0.5 A g −1 .
Article Details
Authors (17)
Meixin Chen
CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics
Yanfang Wang
State Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences
Qiaoli Zhang
Guobin Lai
State Key Laboratory of Nonlinear Mechanics
Xinyu Zheng
Yuhang Zhuang
Zehang Du
State Key Laboratory of Green and Efficient Development of Phosphorus Resources Key Laboratory of Advanced Materials Technologies International (Hong Kong Macao and Taiwan) Joint Laboratory on Advanced Materials Technologies College of Materials Science and Engineering Fuzhou University Fuzhou Fujian China
Kailai Xia
Key Laboratory of Advanced Materials Technologies International (HongKong Macao and Taiwan) Joint Laboratory on Advanced Materials Technologies College of Materials Science and Engineering Fuzhou University Fuzhou Fujian 350108 P. R. China
Liuyan Li
Key Laboratory of Advanced Materials Technologies International (HongKong Macao and Taiwan) Joint Laboratory on Advanced Materials Technologies College of Materials Science and Engineering Fuzhou University Fuzhou Fujian 350108 P. R. China
Jianqiang Weng
Key Laboratory of Advanced Materials Technologies International (HongKong Macao and Taiwan) Joint Laboratory on Advanced Materials Technologies College of Materials Science and Engineering Fuzhou University Fuzhou Fujian 350108 P. R. China
Zhixing Lu
College of Environmental and Resource Sciences Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Normal University Fuzhou Fujian P. R. China
Feng Liu
Zheyuan Liu
College of Materials Science and Engineering Fuzhou University Fuzhou P. R. China
Chengkai Yang
Wen Liu
Mingmao Wu
Key Laboratory of Advanced Materials Technologies International (HongKong Macao and Taiwan) Joint Laboratory on Advanced Materials Technologies College of Materials Science and Engineering
Zhigang Zou
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, 22 Hankou Road, Nanjing 210093, China