稳定和高容量的离子电池的化PAA涂层SiOx阳极:界面调节和体积膨胀抑制
Yazecheng Liu1,2, Tao Zhang1,2, Siwei Jiang1,2
1National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, China.
Small (Weinheim an der Bergstrasse, Germany)
|January 29, 2026
概括
研究人员使用化聚烯酸 (LiPAA) 开发了子氧化物 (SiOx) 复合材料,以改进离子电池阳极. 这一战略提高了高性能储能电导率,稳定性和容量.
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:
- 子氧化 (SiOx) 是一个有前途的阳极材料,用于高能量密度的离子电池.
- 挑战包括大体积变化,低导电性,寄生性的副作用反应和有限的容量/能量密度.
研究的目的:
- 通过开发一种新的复合材料来解决SiOx阳极的局限性.
- 为了增强电子传输,改善离子动力学,并确保结构稳定性.
- 促进稳定的固体电解质接口 (SEI) 并抑制寄生反应.
主要方法:
- 通过喷雾干燥使用化聚烯酸 (LiPAA) 修改微米SiOx.
- 球形SiOx@LiPAA复合材料的制造.
- 在离子电池中复合材料的电化学测试.
主要成果:
- SiOx@LiPAA复合材料在0.5C200个循环后表现出1234.06mAhg-1的可逆特异容量.
- 在4.0C的高速度下,实现了536.2 mAh g-1的可逆容量.
- 使用LiFePO4阴极的全电池在500个循环后保持了86.4%的容量保留.
结论:
- LiPAA修改有效地增强了电子传输,充当了弹性缓冲器,并促进了稳定的SEI.
- 开发的SiOx@LiPAA复合材料为高性能,低成本和可扩展的基于的阳极提供了可行的途径.
- 这一策略显著提高了离子电池的稳定性和能量密度.
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