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相关概念视频

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...
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Ionic Bonds00:42

Ionic Bonds

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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...
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Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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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...
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Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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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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Classification of Elements and Compounds02:54

Classification of Elements and Compounds

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Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond. Elements are classified as atomic or molecular based on the nature of their basic units.
Compounds are pure substances composed of two or more elements in fixed, definite proportions. Compounds are classified as ionic or molecular (covalent) based on the bonds...
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相关实验视频

Updated: Sep 19, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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分子离子复合聚合物电解质用于高压电池.

Jungki Min1, Zhaohui Liang1, Nicholas F Pietra1,2

  • 1Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States.

ACS applied materials & interfaces
|June 15, 2025
PubMed
概括

分子离子复合材料 (MIC) 为高压电池提供稳定的聚合物电解质,克服了接口问题. 这些膜为更安全,高能电池应用提供了出色的机械和电化学性能.

关键词:
富含的阴极是什么电解质添加剂是一种电解质添加剂.接口稳定性 接口稳定性聚合物电解质的高分子电解质.固态电池 固态电池

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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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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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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:

  • 聚合物电解质是安全,高能电池的关键,但面临诸如寄生虫副作用反应和电极-电解质接口的分解等挑战.
  • 现有的聚合物电解质通常需要额外的液体组件,使细胞组装复杂化,并限制高压系统的性能.

研究的目的:

  • 开发使用分子离子复合材料 (MIC) 的新型独立的聚合物电解质膜,以解决高压电池的界面不稳定性.
  • 研究MIC的机械,电化学和循环性能,作为传统液体电解质的潜在替代品.

主要方法:

  • 分子离子复合材料 (MIC) 的合成,包括带电的刚性棒离子聚合物 (PBDT) 和离子液体,盐和添加剂的移动离子.
  • 使用线性扫描电量计 (LSV) 进行MIC电解质的离子导电性,电化学稳定性窗口 (ESW) 和机械性能 (拉伸强度,弹性模量) 的表征.
  • 组装和测试使用优化MIC电解质的NMC811下载Li金属电池,以评估循环稳定性和容量保留.

主要成果:

  • 优化的MIC电解质显示出高离子导电性 (3.21mS cm−1在60°C) 和广泛的电化学稳定性窗口 (5V与LiLi+).
  • MIC 具有出色的机械性能,拉伸强度为 6.3 MPa,弹性模量为 450 MPa.
  • 具有MIC的NMC811玉米金属电池显示出良好的循环稳定性,提供212 mAhg-1的初始容量,并在60°C的100个循环后保持93%的容量.

结论:

  • 分子离子复合材料 (MIC) 为高压电池提供了一个有前途,稳定和机械强大的聚合物电解质平台.
  • MIC有效地减轻了接口问题,实现了增强的电化学稳定性和良好的循环性能,为更安全的能源存储解决方案铺平了道路.