Rational design of zinc powder anode with high utilization and long cycle life for advanced aqueous Zn-S batteries

被引:23
作者
Li, Jianbo [1 ]
Cheng, Zexiao [1 ]
Li, Zhen [1 ]
Huang, Yunhui [1 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
基金
中国博士后科学基金; 国家重点研发计划;
关键词
Cycle lives - Energy density - Energy storage applications - High utilizations - Long cycles - Low-costs - Non-toxicity - Rational design - Zinc powder - Zinc sulfur;
D O I
10.1039/d3mh00278k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Aqueous zinc-sulfur (Zn-S) batteries are regarded as excellent candidates for energy storage applications due to their low cost, non-toxicity, and high theoretical energy density. However, the low utilization of the traditional thick foil-type Zn anode would severely restrict the overall energy density of Zn-S batteries. Herein, a mechanically and chemically stable powder-Zn/indium (pZn/In) anode with finite Zn loading was designed and constructed for enhancing the cycle stability of aqueous Zn-S batteries. Notably, the bifunctional In protective layer can inhibit the corrosion rate of highly active pZn and homogenize the Zn2+ flux during Zn plating/stripping. As a result, the obtained pZn/In anode exhibits a greatly improved cyclability of over 285 h even under a much harsh test condition (10 mA cm(-2), 2.5 mA h cm(-2), Zn utilization rate: similar to 38.5%). Furthermore, when assembled with an S-based cathode at a negative/positive (N/P) capacity ratio similar to 2, the full cell delivers a high initial specific capacity of similar to 803 mA h g(-1) and operates stably for over 300 cycles at 2C with a low capacity fading rate of similar to 0.17% per cycle.
引用
收藏
页码:2436 / 2444
页数:9
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