通过循序渐进的无形化策略使金属电池中高兼容性LiI-3-Hydroxypropionitrile小分子固态电解质的运行成为可能
Tao Song1, Da Wang1, Hongxia Wang2
1School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China.
Angewandte Chemie (International ed. in English)
|May 30, 2023
概括
研究人员开发了一种新的渐进形态化策略,以增强小分子固态电解质中的离子 (Li+) 导电,提高金属电池的性能.
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
- 固态化学 固态化学
背景情况:
- 小分子固态电解质 (例如,LiI-3-hydroxypropionitrile,LiI-HPN) 结合了陶和聚合物的优势,但受到Li+导电性差的影响.
- 这种限制阻碍了它们在先进的金属电池中的使用,尽管它们具有良好的界面兼容性.
研究的目的:
- 为了克服LiI-HPN无机-有机混合系统中的Li+导电瓶.
- 开发一种有效的Li+运输在小分子固态电解质中的战略.
主要方法:
- 提出了一种涉及组合,时间和温度调整的渐进形态化策略.
- 利用第一原则的分子动力学模拟来理解离子导电机制.
- 构建了一种复合固态电解质,其无形度增加.
主要成果:
- 从化物 (I-) 到离子 (Li+) 导电实现了高效的转换.
- 在优化的LiI-HPN电解质中显著提高了离子导电性.
- 在金属电池中使用Li4Ti5O12阴极进行250个周期的稳定运行.
结论:
- 渐进形态化策略有效地提高了LiI-HPN电解质中的Li+导电性.
- 这种方法为在金属电池中利用高度兼容的小分子固态电解质提供了可行的途径.
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