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相关概念视频

Ionic Crystal Structures02:42

Ionic Crystal Structures

17.0K
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...
17.0K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

20.0K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
20.0K
High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

3.5K
High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
3.5K
High-Performance Liquid Chromatography: Instrumentation00:57

High-Performance Liquid Chromatography: Instrumentation

3.0K
High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
3.0K
Ionic Radii03:10

Ionic Radii

33.5K
Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
33.5K
Ionic Bonds00:42

Ionic Bonds

130.6K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
130.6K

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相关实验视频

Updated: Jan 31, 2026

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids

Published on: August 10, 2016

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通过机械研究和ML辅助结构属性分析,设计聚离子液体作为高性能LiFePO4粘合剂.

Zhiqi Chen1, Feng Chen2, Jifeng Wang1

  • 1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Research Center of AI for Polymer Science, Fudan University, Shanghai 200438, China.

ACS applied materials & interfaces
|January 29, 2026
PubMed
概括

新的聚离子液体) 结合剂通过改善离子传输和减少含量,显著提高离子电池的性能. 这些先进的结合剂为高速率,稳定的铁酸盐 (LFP) 阴极提供了可持续的途径.

关键词:
在 LFP 阴极粘合剂.多离子液体) 是一种多离子液体.化学信息学 化学信息学电池是一种电池.机器学习是机器学习.

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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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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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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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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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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
  • 聚合物化学 聚合物化学

背景情况:

  • 使用聚乙烯化物 (PVDF) 结合剂的传统铁酸盐 (LFP) 阴极在离子导电性,速率能力和高电流循环稳定性方面存在局限性.
  • 由于其高含量,PVDF结合剂也引发了环境问题.

研究的目的:

  • 开发新的聚离子液体 (PIL) 结合剂,增强离子传输并提高LFP阴极的电化学性能.
  • 为了研究由PIL结合剂促进的离子集群介导的Li+跳跃机制.
  • 使用机器学习建立下一代PIL结合剂的分子设计框架.

主要方法:

  • 多功能多离子液体结合剂的合成.
  • 电化学特征包括循环电压测量和不同速率的静电循环.
  • 核磁共振光谱学和分子动力学模拟以阐明Li+运输机制.
  • 整合基于化学的机器学习与实验验证.

主要成果:

  • PIL结合剂加速了Li+运输的140-200%,并减少了60%的含量.
  • 优化的LFP-PIL阴极表现出高速率性能 (100mAh·g-1在15C) 和出色的循环稳定性 (95.5%的容量保留在5C的500个循环后).
  • 在PIL中离子聚合被确定为促进Li+迁移的关键.

结论:

  • 聚离子液体) 结合剂为开发高性能,可持续的离子电池阴极提供了一个有希望的战略.
  • 离子集群介导的Li+跳跃机制为增强电池性能提供了关键的机械洞察力.
  • 为先进的PIL结合剂建立了一个可通用的设计框架,为未来的材料开发铺平了道路.