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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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The Nernst Equation02:59

The Nernst Equation

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Nonstandard Reaction Conditions
The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
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Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

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Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
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相关实验视频

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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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可充电固态纳米金属电池在-20°C下工作.

Haibo Jin1,2, Xiong Xiao1, Lai Chen2

  • 1Beijing Institute of Technology, School of Materials Science and Engineering, Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing Key Laboratory of Environmental Science and Engineering, Beijing, 100081, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|July 24, 2023
PubMed
概括

这项研究介绍了一种固态金属电池 (SSNMB),该电池在结温度下有效运行. 新的电池设计采用纳西康固体电解质,在广泛的温度范围内提供稳定的金属阳极性能.

关键词:
这是NASICON型的固体电解质.纳米金属电池的使用方法接口电阻的介面电阻.在低温下运行.

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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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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:

  • 固态金属电池 (SSNMB) 面临着金属阳极稳定性的挑战,特别是在低温下.
  • 现有的无机固体电解质 (SE) 在结条件下难以保持性能,限制了电池应用.

研究的目的:

  • 开发一种可充电的SSNMB,能够在广泛的温度范围内稳定运行,包括零下温度.
  • 为了解决低温下金属阳极和固体电解质之间的界面电阻问题.

主要方法:

  • 在SSNMB中使用了NASICON类型的固体电解质.
  • 研究了从-20°C到45°C的Na金属/SE界面的界面电阻.
  • 在-20°C进行长期的Na-metal/剥离循环.
  • 在整个电池系统中使用Na3V1.5Al0.5(PO4) 3阴极.

主要成果:

  • 从-20°C到45°C实现了SSNMB稳定的运行.
  • 保持低的界面电阻 (0.4 Ω cm2在45 °C, <110 Ω cm2在-20 °C).
  • 经过2000多小时的稳定Na-金属循环在-20°C以最小的极化.
  • 观察到形成一个均的Na3-xCaxPO4介相层,增强介面稳定性.
  • 充满电池在-20°C时显示80mAhg-1容量,在0°C时保持108mAhg-1.

结论:

  • 基于NASICON的SSNMB表现出极好的低温性能和阳极稳定性.
  • 开发的相间层对于广泛的温度运行能力至关重要.
  • 这项工作显著扩大了SSNMB的操作温度范围,使所有季节的应用成为可能.