Lee Jaehan, Kim Young-Min, Kim Ju-Han, Jeong Jee-Woon, Lee Donghyun, Sung Jae Wook, Ahn Young Ju, Shim Jae-Hyun, Lee Sanghun
Carl Zeiss, Carl-Zeiss-Strasse 22, 73447 Oberkochen, Germany.
Department of Energy Science, Sungkyunkwan University (SKKU), Suwon 16419, Korea.
Materials (Basel). 2021 Nov 16;14(22):6912. doi: 10.3390/ma14226912.
The development of novel anode materials for high energy density is required. Alloying Si with other metals is a promising approach to utilize the high capacity of Si. In this work, we optimized the composition of a Si-Ti-Al ternary alloy to achieve excellent electrochemical performance in terms of capacity, cyclability, and rate capability. The detailed internal structures of the alloys were characterized through their atomic compositions and diffraction patterns. The lithiation process of the alloy was monitored using real-time scanning electron microscopy, revealing that the mechanical stability of the optimized alloy was strongly enhanced compared to that of the pure silicon material.
需要开发用于高能量密度的新型负极材料。将硅与其他金属合金化是利用硅高容量的一种有前景的方法。在这项工作中，我们优化了Si-Ti-Al三元合金的组成，以在容量、循环稳定性和倍率性能方面实现优异的电化学性能。通过合金的原子组成和衍射图谱对其详细的内部结构进行了表征。使用实时扫描电子显微镜监测合金的锂化过程，结果表明，与纯硅材料相比，优化后的合金的机械稳定性得到了显著增强。
