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Updated: Jul 18, 2026

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Published on: December 16, 2011

可逆阳极通过化无机有机混合涂层实现

Jiabin Fang¹, Kang Wu¹, Lijun Qin¹

¹Laboratory of Material Surface Engineering and Nanofabrication, Science and Technology on Combustion and Explosion Laboratory, Xi'an Modern Chemistry Research Institute, Xi'an 710065, People's Republic of China.

Journal of colloid and interface science

|October 31, 2024

概括

研究人员开发了一种用于阳极的新涂层,大大提高了电池的性能和稳定性. 这一进步使得具有更长寿命的更高能量密度电池成为可能,克服了当前基于的技术的主要局限性.

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:

阳极为先进电池提供比石墨阳极更高的能量密度.
关键的挑战包括的体积膨胀和不稳定的接口,限制周期寿命和实际使用.
由于这些问题,目前的工业Si/C复合材料使用的含量有限 (<30 wt%).

研究的目的:

提高用于高能量密度电池的阳极的稳定性和性能.
为电极开发一种新的表面修饰策略.
为了研究保护性介相层的形成和特性.

主要方法:

利用分子层沉积 (MLD) 在电极上应用富含的无机有机混合 (AlFHQ) .
使用现场X射线光电子光谱 (XPS) 和原子力显微镜 (AFM) 进行了AlFHQ膜的特征.
制造并经过测试的Si@AlFHQ-20阳极和全细胞 (Si@AlFHQ-20//LiCoO2@Al2O3).

主要成果:

在Si阳极上形成了一个机械化学强大的,富含LiF的混合固体电解质介相 (SEI).
优化的5纳米AlFHQ涂层 (Si@AlFHQ-20) 提高了界面稳定性和Li+运输动力学.
实现了Si阳极的稳定循环,初始库伦比克效率 (ICE) 高达92.3%,容量约为3.8 mAh cm-2.
证明了增强的速率能力 (在2.0 A/g时1468 mAh/g) 和良好的循环性能.
在苛刻的阴极条件下,全电池稳定运行了100多个周期 (2.68 mAh cm-2,4.55 V切断).

结论:

富含的混合改造技术有效地稳定了阳极.
这种方法克服了阳极的关键局限性,实现了高性能储能.
开发的方法为下一代高能量密度离子电池铺平了道路.

关键词:

骑自行车的稳定性骑自行车的稳定性化界面是指化界面.离子电池的离子电池是什么分子层沉积的分子层沉积.阳极是一种阳极.

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