Size-Complementary, High-Concentration Zincophilic Solute Molecules for Wide-Temperature-Range Aqueous Zinc Metal Batteries

被引:5
作者
Wang, Baojun [1 ]
Zheng, Rong [1 ]
Yang, Weifeng [1 ]
Hou, Chengyi [1 ]
Zhang, Qinghong [2 ]
Li, Kerui [1 ]
Li, Yaogang [2 ]
Wang, Hongzhi [1 ]
机构
[1] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China
[2] Donghua Univ, Coll Mat Sci & Engn, Engn Res Ctr Adv Glasses Mfg Technol, Shanghai 201620, Peoples R China
基金
中国国家自然科学基金;
关键词
aqueous Zn metal batteries; mixed soluteadditives; wide temperature range; complementarysize; high concentration; ELECTROLYTE; PERSPECTIVES; FUNDAMENTALS;
D O I
10.1021/acsaem.3c01928
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
To realize stable aqueous zinc metal batteries that can operate over a wide temperature range, simple introduction of organic solutes into the electrolyte is required. However, common solute additives are poorly soluble in concentrated electrolytes for low-temperature applications. Herein, a strategy of using mixed solute additives is developed based on size-complementary zincophilic molecules with electron-rich groups. In the bulk electrolyte, the high-concentration short-chain acetamide (5 mol kg(-1)) dominantly regulates the hydrated Zn2+ and the hydrogen-bonding network for suppressing active H2O; at the anode interface, the complementary short-chain acetamide and long-chain silk amino acids form specific-adsorption and pH-buffering layers. Furthermore, the size-complementary zincophilic molecules reconstruct the double electric layer and solid electrolyte interphase to inhibit the side reactions of the Zn anode. Consequently, the zinc metal batteries have excellent cycle life (3400 h), Coulombic efficiency (99.7%), and wide-temperature-range adaptability (-60 to 60 degrees C), making them attractive candidates for practical applications.
引用
收藏
页码:12249 / 12258
页数:10
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