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相关概念视频

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.6K
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. 
41.6K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.3K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.3K
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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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...
27.4K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

370
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
370
Formation of Complex Ions03:45

Formation of Complex Ions

23.6K
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...
23.6K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

23.9K
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:
23.9K

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相关实验视频

Updated: Jul 4, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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一种富含化物固体的电解质稳定了金属电池.

Huashan Wang1, Weiyuan Huang2, Ruijun Rao1

  • 1Department of Materials Science and Engineering, College of Chemistry and Materials Science, Jinan University, Guangzhou, 511443, P. R. China.

Advanced materials (Deerfield Beach, Fla.)
|February 2, 2024
PubMed
概括

一种富含的新型固体类电解质 (SLE) 通过实现均沉积和高离子导电性来提高金属阳极性能. 与传统的固态设计相比,这种突破提供了稳定的循环和更简单的电池组装.

关键词:
金属阳极是金属的阳极.固体电解质之间的相间.固体类型的电解质.

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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 金属阳极面临着树突形成和循环稳定性差的挑战.
  • 传统的液体电解质会带来安全风险,并限制能量密度.
  • 固态电解质提供安全性,但往往遭受低离子导电性和差的接口接触.

研究的目的:

  • 开发一种富含的固态类电解质 (SLE),它结合了固态电解质和液态电解质对金属电池的优势.
  • 为了提高阳极的可逆性,接口电荷转移和沉积均性.
  • 在电池中实现高离子导电性和稳定的循环性能.

主要方法:

  • 制造富含化物的固体类电解质,具有三酸盐组增强的框架通道.
  • 固体电解质介相 (SEI) 形成和离子传输特性的表征.
  • 对对称电池和LiFePO4电池进行电化学测试,包括涂层/脱落循环和临界电流密度测量.

主要成果:

  • SLE促进了富含无机物SEI的形成,促进了统一而紧的沉积.
  • 三酸盐组使Li+的脱和运输有效,从而产生高室温离子导电性 (1.1mS cm−1) 和低激活能量 (0.17 eV).
  • 对称电池在3500小时内表现出稳定的/剥离,并支持高临界电流密度2mA cm-2.2.
  • 液体电池 LiFePO4 电池表现出异常的循环性 (>1.5年),性能优于液体电解质电池.
  • 在高压圆柱形和高容量袋式电池中证明了可行性,其处理能力比全固态电池更简单.

结论:

  • 开发的富含的SLE有效地解决了金属阳极的关键局限性.
  • SLE为实现更安全,高性能,易于加工的电池提供了一个有前途的途径.
  • 这项技术比传统的液态电池电解质和全固态电池电解质具有显著的进步.