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一种基于离子-离子协同效应的多功能添加剂,用于高度稳定的金属阳极
Yulin Zhang1, Yongkang Wang1, Cunxin Wang1
1School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China.
The journal of physical chemistry letters
|April 23, 2024
概括
一种新的添加剂阻止了树脂的生长和的演变,延长了水性电池 (AZB) 的寿命. 这一突破确保了均的沉积,并抑制了副作用,以保持稳定的电池性能.
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:
- 树脂的生长和进化反应限制了水性电池 (AZB) 中的阳极的寿命.
- 开发稳定和持久的AZB对于下一代储能解决方案至关重要.
研究的目的:
- 设计一种多功能添加剂,促进无树和稳定的阳极.
- 通过理论计算和实验表征来研究添加剂性能背后的机制.
主要方法:
- 使用一种新型分子结构添加剂,在接口上对和离子进行协同调节.
- 理论计算 (例如,DFT) 来理解接口相互作用.
- 电化学表征包括库伦比效率测量和长期循环测试在Zn光基和Zn光基Zn电池中.
- 对固体电解质间相 (SEI) 形成的分析.
主要成果:
- 该添加剂有效地抑制了树状石的形成和的演化.
- 理论和实验数据证实了电离子的静电屏蔽效应,稳定的溶解和双层SEI结构.
- 在300个循环中,在ZnBodyCodeCu细胞中获得了99.4%的平均库伦比效率.
- 在Zn无线电Zn电池中,已证明稳定循环超过3000小时 (1.0 mA cm−2/1.0 mAh cm−2) 和300小时 (10 mA cm−2/10 mAh cm−2).
- 充满电池的周期寿命延长了2000个周期.
结论:
- 设计的多功能添加剂可以在AZB中实现无树和稳定的阳极.
- 协同作用的离子调节和由此产生的SEI结构是提高电池性能的关键.
- 这种方法显著提高了AZB的库伦比克效率和循环寿命,为实际应用铺平了道路.
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