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用于改善水性 Zn-S 电池中 ZnS 阴极的反应动力学的痕迹兴奋剂
Yibin Ren1, Jianbo Li1, Yi Zhang1
1State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Small (Weinheim an der Bergstrasse, Germany)
|May 14, 2024
概括
水性硫电池对储能充满希望. 硫化与的合提高了阴极性能,改善了实际应用的稳定性和动力学.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性硫 (Zn-S) 电池具有低成本,高容量和安全性.
- 挑战包括硫的导电性差和体积膨胀,导致电极裂和慢动力学.
研究的目的:
- 通过修改阴极来解决Zn-S电池的局限性.
- 为了改善电极稳定性和反应动力学,用于实际储能.
主要方法:
- 商用硫化 (ZnS) 被用作阴极材料.
- 使用 (Se) 的兴奋剂修改策略被采用,创造了ZnS0.93Se0.07.
- 在各种电流密度和质量负载下评估了电化学性能.
主要成果:
- ZnS0.93Se0.07阴极表现出增强的循环稳定性和反应动力学.
- 与ZnS (1.86 eV) 相比,ZnS0.93Se0.07 (1.40 eV) 的较小带隙促进了性能的提高.
- 实现了552 mAh g-1的0.1 A g-1和330 mAh g-1的2 A g-1的高特定容量.
- 通过高质量负载和有限的电解质,证明了3.8 mAh cm-2的高面积容量.
结论:
- 用添加的 ZnS 阴极为改善 Zn-S 电池性能提供了一个简单而有效的策略.
- 这种修改增强了电极稳定性和反应动力学,为实际的Zn-S电池应用铺平了道路.
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