稳定的Na-S电池的化学和空间双限制工程,容量约100%的容量保留
Yong Zhang1, Xinyi Guo2, Qi Yang1
1State Key Laboratory of Chemical Resource Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.
概括
研究人员为硫 (Na-S) 电池开发了一种双封闭策略,提高了硫阴极的稳定性. 这种方法显著提高了循环性能,解决了纳斯电池技术的关键局限性.
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:
- 硫 (Na-S) 电池提供高能量密度和低成本.
- 阴极稳定性较差,特别是来自硫的,阻碍了Na-S电池的开发.
研究的目的:
- 为了提高 Na-S 电池的稳定性和循环性能.
- 为了解决Na-S电池技术中硫阴极的局限性.
主要方法:
- 使用了化学和空间双重限制的方法.
- 硫通过C-S/N-C=S键与碳发生共聚键.
- 硫被加工成小的S1-S2物种,并被限制在碳孔内.
主要成果:
- 硫阴极表现出极好的稳定性,在1000个循环后保持97.64%的容量.
- 观察到一个协调结构 (N··Na··S),防止C-S债券断裂.
- 有效地阻碍了多硫化的形成和溶解.
结论:
- 双封闭策略显著提高了Na-S电池的稳定性.
- 这种方法为硫电池提供了一个有前途的解决方案.
- 这些发现为更耐用,更高效的Na-S电池铺平了道路.
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