Highly Reversible Aqueous Zinc Batteries enabled by Zincophilic-Zincophobic Interfacial Layers and Interrupted Hydrogen-Bond Electrolytes

被引:206
作者
Cao, Longsheng [1 ]
Li, Dan [1 ]
Soto, Fernando A. [2 ]
Ponce, Victor [2 ]
Zhang, Bao [1 ]
Ma, Lu [3 ]
Deng, Tao [1 ]
Seminario, Jorge M. [2 ,4 ,6 ]
Hu, Enyuan [5 ]
Yang, Xiao-Qing [5 ]
Balbuena, Perla B. [2 ,4 ]
Wang, Chunsheng [1 ]
机构
[1] Univ Maryland, Dept Chem & Biomol Engn, College Pk, MD 20742 USA
[2] Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843 USA
[3] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA
[4] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
[5] Brookhaven Natl Lab, Chem Div, Upton, NY 11973 USA
[6] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA
关键词
aqueous zinc batteries; hydrogen bonds; low temperature; salt precipitation; zincophilic-zincophobic interfacial bilayer; LIQUID WATER;
D O I
10.1002/anie.202107378
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Aqueous Zn batteries promise high energy density but suffer from Zn dendritic growth and poor low-temperature performance. Here, we overcome both challenges by using an eutectic 7.6 m ZnCl2 aqueous electrolyte with 0.05 m SnCl2 additive, which in situ forms a zincophilic/zincophobic Sn/Zn-5(OH)(8)Cl-2 center dot H2O bilayer interphase and enables low temperature operation. Zincophilic Sn decreases Zn plating/stripping overpotential and promotes uniform Zn plating, while zincophobic Zn-5(OH)(8)Cl-2 center dot H2O top-layer suppresses Zn dendrite growth. The eutectic electrolyte has a high ionic conductivity of approximate to 0.8 mS cm(-1) even at -70 degrees C due to the distortion of hydrogen bond network by solvated Zn2+ and Cl-. The eutectic electrolyte enables Zn parallel to Ti half-cell a high Coulombic efficiency (CE) of >99.7 % for 200 cycles and Zn parallel to Zn cell steady charge/discharge for 500 h with a low overpotential of 8 mV at 3 mA cm(-2). Practically, Zn parallel to VOPO4 batteries maintain >95 % capacity with a CE of >99.9 % for 200 cycles at -50 degrees C, and retain approximate to 30 % capacity at -70 degrees C of that at 20 degrees C.
引用
收藏
页码:18845 / 18851
页数:7
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