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富含B和F的缓冲介面可以实现高速率和高稳定性的SiO/C阳极

Zhaoyu Zhang¹, Yufei Zhang¹, Minghui Ye¹

¹Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China. licc@gdut.edu.cn.

Chemical communications (Cambridge, England)

|August 24, 2023

概括

一种新的表面工程方法通过创建缓冲间相来改进碳 (SiO/C) 阳极. 这提高了电池的性能和耐用性,解决了阳极材料的关键挑战.

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:

碳 (SiO/C) 阳极在电池循环过程中面临着诸如大量体积膨胀和缓慢反应动力学等挑战.
这些问题限制了SiO/C阳极在高性能储能设备中的实际应用.

研究的目的:

为SiO/C阳极制定一个简单且通用的表面工程策略.
为了克服SiO/C阳极中体积膨胀和慢动力学的局限性.

主要方法:

一种新的表面修饰技术,涉及在400°C温度下对预吸收的盐进行热处理.
在SiO/C材料上引入/ (B-/F-) 丰富的缓冲间相.

主要成果:

设计的SiO/C阳极显著提高了高速率性能.
该材料表现出增强的长期循环耐用性,表明稳定的电化学性能.

结论:

拟议的表面工程战略有效地解决了SiO/C阳极的关键问题.
这种方法为开发下一代电池的先进阳极材料提供了一个有希望的途径.

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Formation of Complex Ions

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...