向高度稳定的Sn2+电解质用于使用基抗氧化剂的水性锡电池
Qiong Wang1, Fengyi Zhang1, Yu Shu1
1Key Laboratory of the Ministry of Education for Advanced Catalysis, Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, China.
基 (HQ) 通过防止氧化,在水性电解质中稳定双价锡 (Sn2+),使水性电池具有超过1500个循环和高效率的稳定Sn阳极成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性电池提供了比有机电解质电池更安全,更可持续的替代方案.
- 锡 (Sn) 由于其高理论容量和快速动力学,在水性电池阳极中表现出有希望的氧化还原化学.
- 双价锡 (Sn2+) 在水性电解质中的不稳定性,导致氧化到Sn4+和降水,阻碍了其实际应用.
研究的目的:
- 研究氨酸 (HQ) 作为抗氧化剂的使用,以稳定Sn2+在水性电解质中的作用.
- 评估HQ对水性电池中Sn阳极的电化学性能和循环稳定性的影响.
- 探索HQ提高基于Sn的水性电池性能的机制.
主要方法:
- 在水性酸性电解质中Sn氧化还原化学的表征.
- 将基 (HQ) 作为抗氧化剂添加到电解质中.
- 对Sn阳极和有机Sn电池进行电化学循环测试.
- 分析电解质稳定性和电极形态.
主要成果:
- HQ有效地防止Sn2+氧化为Sn4+,保持电解质透明度并防止沉物形成.
- 使用HQ添加剂的Sn阳极表现出超过1500个周期的稳定循环,平均高库伦比效率 (CE) 为99.9%.
- 有机的Sn细胞表现出极好的循环稳定性,在10,000个循环后保持71%的容量.
结论:
- 化是一种高效的抗氧化剂,可在水性电解质中稳定Sn2+.
- 该HQ抗氧化剂策略显著提高了基于Sn的水性电池的循环性能和稳定性.
- 这种方法为开发先进的水性电池系统提供了一种简单且具有成本效益的方法.
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