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相关概念视频

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

39.1K
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. 
39.1K
Ionic Crystal Structures02:42

Ionic Crystal Structures

13.9K
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...
13.9K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

23.5K
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:
23.5K
Acid Halides to Alcohols: LiAlH4 Reduction01:19

Acid Halides to Alcohols: LiAlH4 Reduction

2.6K
Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
2.6K
Metallic Solids02:37

Metallic Solids

18.0K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
18.0K
Electrolysis03:00

Electrolysis

25.7K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
25.7K

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相关实验视频

Updated: May 8, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

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全固态金属电池中化物电解质的层间设计.

Zeyi Wang1, Tengrui Wang1, Nan Zhang1

  • 1Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20740, USA.

Advanced materials (Deerfield Beach, Fla.)
|May 7, 2025
PubMed
概括

研究人员开发了新的化电解质,用于更安全,更高能量的全固态金属电池. 一个新的中间层显著提高了稳定性和性能,为先进的电池应用实现了更高的临界电流密度.

关键词:
所有固态电池都是固态电池.化物电解质的化物电解质.界面设计 界面设计 界面设计界面稳定性 界面稳定性金属金属的使用情况

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

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相关实验视频

Last Updated: May 8, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
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Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy

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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:

  • 全固态金属电池 (ASSLMB) 为电力运输提供了更高的安全性和能量密度.
  • 化电解质具有高离子导电性和阳极稳定性,适用于高压阴极.
  • 目前的化物电解质面临着低阴极稳定性和与金属的差异性接口的挑战.

研究的目的:

  • 为了解决ASSLMBs中化电解质的局限性.
  • 为金属阳极开发稳定的固体电解质介相.
  • 提高ASSLMB的临界电流密度和循环稳定性.

主要方法:

  • 合成 Li3YbCl6 和 Li3LuCl6 电解质.
  • 设计和实施一个转化为Li6PI3.3的PI3中间层.
  • 电化学特性,包括临界电流密度 (CCD) 和循环性能.
  • 接口阻力测量. 接口阻力测量.

主要成果:

  • PI3中间层形成了一个Li6PI3间相,将界面电阻降低到34 Ω,并将临界超电位增加到114 mV.
  • 带有Li6PI3中间层的Li3LuCl6电解质实现了1.0mA cm-2的CCD,超过了之前的化物电解质.
  • 经过220个循环后,在0.5 mA cm-2和Li//LiCoO2细胞中86.5%的容量保留下来,在400个循环中表现出稳定的Li//Li循环.

结论:

  • 开发的Li6PI3介相有效地稳定了化物电解质中的金属接口.
  • 这些增强的化电解质显示出对高性能和安全的ASSLMB的承诺.
  • 这些发现为ASSLMB在交通电气化等苛刻领域的实际应用铺平了道路.