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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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接口工程用于构建稳定于空气的和性石榴型固体电解质的接口工程.

Sidong Zhang1,2, Meiqi Jia3, Sijie Guo3

  • 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS), Beijing 100190, China.

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概括

用Mg3(PO4)2涂上石榴石固体电解质可以提高空气稳定性和的湿透性. 这种修改通过降低界面电阻和防止状物生长来提高固态电池的性能.

关键词:
复合材料涂层是一种复合材料涂层.石化二氧化碳三氧化石榴石电解质 石榴石的电解质固态电池是一种固态电池.表面处理 表面处理

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Determination of Thermodynamic Properties of Alkaline Earth-liquid Metal Alloys Using the Electromotive Force Technique
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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
  • 固态化学 固态化学

背景情况:

  • 石榴石类型的固体电解质 (SE) 由于其高离子导电性和电化学稳定性,对固态金属电池具有前景.
  • 石榴石SE的空气敏感性导致Li2CO3的形成,降低了接口特性和电池性能.

研究的目的:

  • 制定一种提高石榴石型固体电解质空气稳定性和接口性能的策略.
  • 为了提高固态金属电池的性能和循环寿命.

主要方法:

  • 使用湿化学方法,用Mg3(PO4)2涂层石榴石SE.
  • 用热处理将Li2CO3转化为Li3PO4/MgO复合层.
  • 电化学表征包括循环稳定性和临界电流密度测量.

主要成果:

  • Mg3(PO4) 2涂层有效地将Li2CO3转化为稳定的Li3PO4/MgO复合物,确保了空气的稳定性.
  • 复合材料接口增强了Li的湿透性,并显著降低了接口电阻.
  • 实现了1.1 mA·cm-2的高临界电流密度和1200小时的稳定循环.
  • 在具有LiFePO4和LiCoO2阴极的全金属电池中表现出极好的循环稳定性.

结论:

  • 3PO4/MgO复合材料接口策略有效地解决了石榴公司的空气敏感性.
  • 这种修改策略是实用的,并提高了固态金属电池的性能.