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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. 
48.6K
Alkyl Halides02:45

Alkyl Halides

19.5K
Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
19.5K
Acid Halides to Alcohols: LiAlH4 Reduction01:19

Acid Halides to Alcohols: LiAlH4 Reduction

3.8K
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...
3.8K
Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

70.9K
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
70.9K
Ionic Crystal Structures02:42

Ionic Crystal Structures

16.8K
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...
16.8K
Acid Halides to Ketones: Gilman Reagent01:14

Acid Halides to Ketones: Gilman Reagent

3.8K
Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
3.8K

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Updated: Jan 11, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

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与相容的化物超声波导体

Fiaz Hussain1, Chunlei Zhao1, Hailun Jin1

  • 1Ningbo Key Laboratory of All-Solid-State Battery, Eastern Institute for Advanced Study, Eastern Institute of Technology, Ningbo 315200, China.

The journal of physical chemistry letters
|November 12, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的基于Yb2+的化物固态电解质 (SSE),该电解质对金属阳极稳定. 这一突破使下一代全固态电池能够实现更高的能量密度.

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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:

  • 金属化物 (Li-M-X) 化合物是所有固态电池 (ASSLB) 的有希望的固态电解质 (SSEs).
  • 目前的化物SSE面临的局限性是由于易受金属阳极的减少,阻碍了能量密度.
  • 发展稳定的SSE对于推进高能量密度ASSLB至关重要.

研究的目的:

  • 设计一类新的Li-M-X超离子导体,对金属阳极增强稳定性.
  • 克服ASSLB中现有的化物SSE的局限性.
  • 确定高性能能源存储的新SSE候选者.

主要方法:

  • 基于M-site元素的电子结构修改的第一原则研究.
  • 使用Ytterbium (Yb2+) 作为M位点元素,而不是传统的M3+/4+/5+.
  • 研究Li4YbCl6相及其特性,包括离子替代.

主要成果:

  • 确定Li4YbCl6作为对Li金属阳极和高压阴极的稳定相.
  • Li4YbCl6具有超宽带间隙 (>7 eV) 和广泛的电化学稳定性窗口 (∼4.25 V).
  • 通过离子替代实现了高离子导电性 (0.15 mS/cm在300 K),在Li4YbCl3Br3中进一步增强到1 mS/cm.

结论:

  • 基于Yb2+的化物SSEs为开发稳定的电解质提供了一个有希望的途径.
  • /4YbCl6接口是动力稳定,显示出优越的电化学稳定性.
  • 这项工作为设计高能量密度的ASSLB提供了关键的见解,以提高安全性和性能.