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相关概念视频

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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Metal-Ligand Bonds02:51

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Trends in Lattice Energy: Ion Size and Charge02:54

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An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
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Updated: Aug 4, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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基于LaCl3的超离子导体与金属兼容

Yi-Chen Yin1,2,3, Jing-Tian Yang2, Jin-Da Luo2

  • 1Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China.

Nature
|April 5, 2023
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概括
此摘要是机器生成的。

研究人员开发了一种新的基于的固体电解质,用于更安全,高性能的金属电池. 这种先进的材料显示出与金属的良好稳定性和兼容性, 克服了电池技术的先前局限性.

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科学领域:

  • 材料科学
  • 电化学
  • 固态化学

背景情况:

  • 无机超离子导体具有高离子导电性和热稳定性.
  • 与金属阳极的界面兼容性差,阻碍了它们在固态金属电池中的使用.

研究的目的:

  • 开发一种基于LaCl3的超离子导体,可改善金属阳极的界面兼容性.
  • 调查新的电解质的离子导电性和电化学稳定性.

主要方法:

  • 合成了一种UCl3类型的LaCl3格子,
  • 研究了+传导路径和电化学特性.
  • 制造和测试了Li-Li对称电池和全固态电池.

主要成果:

  • 优化的Li0.388Ta0.238La0.475Cl3电解质具有较高的Li+导电性 (3.02 mS cm-1在30°C) 和较低的激活能量 (0.197 eV).
  • 证明与金属的界面兼容性很好,形成了梯度被动化层.
  • 在Li-Li对称电池中实现稳定循环超过5000小时,在全固态电池中超过100个循环.

结论:

  • 基于LaCl3的电解质为稳定的固态金属电池提供了有前途的解决方案.
  • UCl3型结构和Ta doping促进了3D Li+迁移网络.
  • 兰化金属显示出在固体电解质开发中进一步进步的潜力.