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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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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. 
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用于全固态电池的合金基体抑制高稳定性阳极.

Xiaomeng Shi1, Zhichao Zeng1, Chao Li1

  • 1Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin 300350, P. R. China. ypdu@nankai.edu.cn.

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将诸如等稀土元素添加到-阳极中,可以有效地抑制全固态电池中的树石的生长,提高性能和稳定性.

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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
  • 电池技术 电池技术

背景情况:

  • 全固态 (Li) 电池 (ASSLBs) 对提高安全性充满希望,但受到树状物生长的影响,降低了性能.
  • 合金阳极用于减轻树突,但树突形成仍然存在,限制了ASSLB循环寿命和效率.

研究的目的:

  • 调查将稀土 (RE) 元素,特别是 (Ce) 纳入Li-In合金阳极的有效性,以抑制ASSLB中的树.
  • 探索RE元素提高阳极稳定性和电化学性能的机制.

主要方法:

  • 在基底中制造含有微型CeIn3颗粒的Li-In-Ce合金阳极.
  • 在ASSLB中测试Li-In-Ce阳极的电化学性能,包括循环稳定性和树观测.
  • 在现场观察涂层和用专门的固体细胞抑制树.

主要成果:

  • 与Li-In-Ce阳极相比,Li-In-Ce阳极表现出优越的电化学性能和增强的循环稳定性 (∼750个循环).
  • CeIn3颗粒有效地限制了Li-In的变形,并促进了均的Li,显著抑制了Li-In树突的生长.
  • 该策略对于其他RE元素 (Y,La,Pr,Sm,Yb) 证明是普遍的,其业绩与RE-In债券强度相关.

结论:

  • 将像Ce这样的RE元素纳入Li-In阳极是一个可行的策略,用于抑制ASSLB中的Li树突.
  • REIn3颗粒的微结构影响是实现连接和提高电池循环稳定性的关键.
  • 这项研究为设计下一代ASSLB的先进,高性能阳极提供了途径.