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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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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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Electrolysis03:00

Electrolysis

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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...
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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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相关实验视频

Updated: May 11, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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对于高温电池系统的离子液电解质技术.

Eleonora De Santis1,2,3, Annalisa Aurora2, Sara Bergamasco3

  • 1Department of Chemical Engineering Materials Environment, La Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy.

International journal of molecular sciences
|April 17, 2025
PubMed
概括

先进的离子液体为离子电池 (LIB) 提供更安全,更高温的电解质,克服了传统有机电解质的局限性,并允许在100°C以上的性能.

关键词:
高热稳定性 高热稳定性在高温应用中使用.伊米达佐离子液体的离子液体电池是电池的使用方式.的含量是什么? 的含量是什么?

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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:

  • 商业离子电池 (LIB) 面临运行温度限制,通常低于60°C,原因是安全问题和与传统有机电解质和不稳定的盐相关的降解问题.
  • 高温应用要求先进的储能解决方案,可在极端热条件下可靠运行,超过当前LIB技术的能力.

研究的目的:

  • 开发和评估使用更安全的离子液体 (IL) 的高温LIBs的新型电解质配方.
  • 为了研究在高温下选择的基于IL的电解质的热稳定性,离子传输特性和电化学性能.

主要方法:

  • 基于四基和1-乙基-3-甲基-胺达酸盐的离子液体的合成和表征,其中含有甲基硫) 胺胺离子.
  • 在高达100°C的温度下评估热行为,离子导电性和电化学稳定性窗口 (阳极稳定性).
  • 在100°C使用开发的IL电解质对Li/LiFePO4细胞进行性能测试.

主要成果:

  • 离子液体在超过150°C的温度下表现出显著的热强度,在100°C的温度下表现出超过4.5V的阳极稳定性.
  • 导电性测量显示,在100°C时,在10−3和10−2 S cm−1之间具有显著的离子输送特性.
  • 在100°C循环使用的Li/LiFePO4电池在0.5°C下提供了超过94%的理论容量,表明了有前途的性能.

结论:

  • 研究的离子液体电解质具有出色的热稳定性和电化学性能,适合高温LIB应用.
  • 这些先进的电解质配方代表了对传统电解质的有希望的替代品,用于在高温下运行的苛刻的储能系统.