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相互透的LiB/Li₃BN₂相使稳定的复合金属阳极成为可能

Piao Qing¹, Shaozhen Huang², Tuoya Naren²

¹State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; National Energy Metal Resources and New Materials Key Laboratory, Central South University, Changsha 410083, China.

Science bulletin

|July 25, 2024

概括

使用六角化 (h-BN) 的新型强大的复合阳极 (LBN) 克服了树的生长和体积变化. 这种材料使得稳定,持久的金属电池具有增强的性能.

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:

没有主体的金属阳极面临着像体积膨胀和树突形成这样的挑战,阻碍了实际的电池应用.
互穿相复合材料为先进材料提供了增强的机械性能.

研究的目的:

开发一种强大的复合阳极 (LBN) 材料,以解决传统金属阳极的局限性.
研究一种由和六角化 (h-BN) 制成的新型LiB/Li3BN2复合物的结构和电化学特性.

主要方法:

通过和h-BN之间的金反应制造一个复合阳极 (LBN),形成相互透的LiB/Li3BN2相.
通过滚动加工超薄的,独立的LBN片.
电化学评估包括循环稳定性,库伦比克效率和LiCoO2囊细胞中的性能.

主要成果:

由于LiB纤维被Li3BN2颗粒固定,LBN材料具有增强的机械强度和结构稳定性.
超薄 (15微米) 和独立的LBN片已经成功地准备好.
LBN阳极实现了高库伦比效率 (99.69%) 和长寿命 (2500小时).
LiCoO2水晶LBN袋式电池表现出极好的循环稳定性,在450个循环后保持90.1%的容量.

结论:

相互透的LiB/Li3BN2架构为金属阳极提供了特殊的循环稳定性和机械强度.
开发的复合阳极为高性能,持久的金属电池提供了有前途的解决方案.
这项工作为处理薄条和设计强化架构提供了一种新的方法,其潜在应用超出了电池.

关键词:

相互透相互透金属阳极是一种金属阳极.李(3)BN(2) 在这个问题上.这是一种Li-B合金.超薄的超薄的

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Ionic Bonding and Electron Transfer

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.