用于具有Si/C阳极的高压离子电池的异构溶剂的非单调工程
Kerui Zhang1, Dong Yan2, Liping Wang2
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, PR China; New Energy Materials Laboratory, Sichuan Changhong Electric Co., Ltd., Chengdu 610041, PR China.
Journal of colloid and interface science
|March 1, 2026
概括
研究人员设计了电解质来稳定离子电池中的阳极. 这一战略改善了下一代高能电池的循环稳定性和容量保留.
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:
- 阳极为下一代离子电池 (LIB) 提供高容量.
- 在循环过程中严重的体积膨胀会导致阳极的容量迅速降低.
- 开发稳定的阳极对于高能量密度LIBs至关重要.
研究的目的:
- 为了提高LIBs中的阳极的循环稳定性.
- 为了减轻由的体积膨胀引起的容量退化.
- 探索电解质分子设计以提高阳极性能.
主要方法:
- 采用异构体工程策略来修改电解质溶解结构.
- 利用甲酸盐 (PF) 分子形成一个由阴离子主导的Li+溶解层.
- 在Si/C阳极表面上构建了具有高离子导电性和机械合规性的固体电解质介相 (SEI).
主要成果:
- 优化过的电解质在Si/C干细胞的NMC全细胞中显示出令人印象深刻的循环稳定性.
- 在400个循环后在0.5C保持83.7%的容量,在300个循环后在1C保持83.9%.
- 高面积负荷 (3 mAh cm-2) 的全电池在150个周期中保持稳定.
结论:
- 电解质的分子设计是延长阳极循环寿命的有效策略.
- 阳离子主导的溶解和符合SEI的罩有助于提高电池性能.
- 这种方法为开发稳定,高能量密度的LIB提供了一个有前途的途径.
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