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相关概念视频

Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

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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.
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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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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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相关实验视频

Updated: Jun 6, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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为稳定的高温金属电池提供弱溶解的循环以太基深度环节性电解质.

Yanru Yang1, Qin Li1, Huan Li1

  • 1Department of Materials Science, Fudan University, Shanghai, 200433, China.

Angewandte Chemie (International ed. in English)
|December 2, 2024
PubMed
概括

这项研究引入了一种新型的使用四基 (THP) 溶剂的深度环氧电解质 (DEE),以提高金属电池的性能. 新的DEE在高温下提高了稳定性和安全性,这对于下一代储能至关重要.

关键词:
深度欧特克斯电解质的电解质.电解质的电解质是一种电解质.界面化学 界面化学金属电池是金属电池的一种.溶剂溶解剂溶解能力较弱的溶剂

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Ultrasound Velocity Measurement in a Liquid Metal Electrode
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科学领域:

  • 电化学 电化学 电化学
  • 材料科学 材料科学 材料科学
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 金属电池 (LMB) 在高温下面临不稳定性和安全挑战.
  • 现有的深度解电解质 (DEE) 患有电极不相容性和不足的还原稳定性.
  • 在DEE中的高Li+度可能导致电化学性能差.

研究的目的:

  • 设计一个新的DEE,以提高高温LMB的稳定性和兼容性.
  • 解决当前DEE的局限性,特别是电极不兼容性和还原稳定性.
  • 为了提高金属电池中LiMn2O4阴极的性能.

主要方法:

  • 开发一种新型DEE,使用弱溶解四基 (THP) 溶剂.
  • 加入 bis ((三甲硫) 胺 (LiTFSI) 缩剂,以增强降解电阻.
  • 使用开发的DEE在室温和高温下对Li12和LiMn2O4电池进行电化学测试.

主要成果:

  • 新的DEE表现出与Li金属阳极的良好兼容性和LiMn2O4阴极的高温耐受性.
  • 在室温下600个循环中,LiMn2O4电池表现出高容量保留率 (96.02%).
  • 在55°C的120个周期和低自放电后,实现了显著的高温性能,保持了91.72%的容量.

结论:

  • 设计的DEE为开发稳定安全的高温金属电池提供了一个有前途的替代方案.
  • 这种电解质设计克服了传统DEE的关键局限性,从而实现了强大的性能.
  • 这种方法有可能扩展到其他需要高温操作的电池化学.