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相关概念视频

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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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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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...
25.8K

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相关实验视频

Updated: May 15, 2025

Fabrication of VB2/Air Cells for Electrochemical Testing
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电化学诱导重构腐烂的氧化物用于回收利用.

Yancheng Chen1,2, Jianxin Ou1, Shanyong Guo3

  • 1College of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian Province 361021, China.

ACS applied materials & interfaces
|April 11, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的电化学方法,用于修复离子电池中降解的氧化 (V2O5). 该技术通过再生电极材料来提高离子电池的性能和寿命.

关键词:
V2O5 的时间.晶体修复 晶体修复在现场进行相位转换.离子电池是一种离子电池.离子电池 离子电池

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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:

  • 晶体修复策略用于延长电极材料的寿命,但具有局限性.
  • 在维修过程中引入的缺陷可能会阻碍电池的性能.
  • 离子电池中受损的电极材料通常需要再生.

研究的目的:

  • 提出一种电化学诱导的相变换方法,用于再生电极材料.
  • 为了补充传统的晶体修复策略,以改善电池循环寿命.
  • 为了提高水性离子电池中的离子储存能力.

主要方法:

  • 使用电化学诱导的相变来修复衰变的α相V2O5.
  • 控制刺激电流并利用介层H2O调整相变动动力学.
  • 从损坏的离子电池中再生V2O5.

主要成果:

  • 再生后的V2O5形成了稳定的双层结构晶体.
  • 在水性离子电池中实现了显著的6.5 mA h cm-2的 Zn2+ 面积容量.
  • 经过1500个周期的循环稳定性,表现优于新鲜的V2O5.

结论:

  • 电化学相位转换是修复和再生电极材料的有效方法.
  • 该技术为提高离子电池的性能和寿命提供了一个有希望的方法.
  • 这种方法为传统的修复策略提供了可行的替代方案,改善了缺陷修复和晶体结构.