一个基于三元混合氧化物的修改分离器,用于稳定的金属电池
Zhanghua Fu1, Guang Xia2, Jiajia Ye2
1Shenzhen Research Institute of Shandong University, Shenzhen 518057, Guangdong, China; Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, Shandong, China.
Journal of colloid and interface science
|October 31, 2024
概括
使用易斯酸性混合氧化物涂层的新型功能分离器有效地抑制了金属电池 (LMB) 中的树石的生长. 这一创新使得无阳极LMB能够稳定循环,为下一代能源存储铺平了道路.
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:
- 金属电池 (LMB) 具有高能量密度,但面临着像树岩形成和低库伦比效率这样的挑战.
- 这些问题阻碍了下一代能源存储LMB的实际应用.
研究的目的:
- 开发一种功能分离器,可以缓解树的生长,并改善LMBs的循环稳定性.
- 研究易斯酸度在调节离子运输和增强电解质稳定的作用.
主要方法:
- 合成了一种用易斯酸性混合氧化物 (ZrO2-SiO2-Al2O3) 涂覆的功能分离器.
- 分析了隔离器在阳极附近的离子定能力和离子运输调制.
- 在一个没有阳极的电池中,使用高负载LiNi0.8Co0.1Mn0.1O2阴极来评估性能.
主要成果:
- 该ZrO2-SiO2-Al2O3涂层显示出强烈的易斯酸位点,固定离子并将Li+转移数增加到0.88.8.
- 这导致了压抑的树石形成,改善了电解质的化学稳定性.
- 一个没有阳极的电池在0.5C下实现了150个周期的稳定循环.
结论:
- 开发的功能分离器有效地抑制了树的生长,并增强了无阳极LMB的长期运行.
- 具有高易斯酸度的混合氧化物是设计用于高性能金属电池的先进分离器的有希望的策略.
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