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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 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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Rate-Determining Steps03:08

Rate-Determining Steps

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Relating Reaction Mechanisms
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
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Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

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To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
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The Born-Haber Cycle02:44

The Born-Haber Cycle

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Lattice Energy 
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相关实验视频

Updated: Jun 23, 2025

Construction and Testing of Coin Cells of Lithium Ion Batteries
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Construction and Testing of Coin Cells of Lithium Ion Batteries

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构建静态的两电子化电池

Xinliang Li1,2, Yanlei Wang3, Junfeng Lu3

  • 1School of Physics and Laboratory of Zhongyuan Light, Zhengzhou University, Zhengzhou 450052, China.

Science advances
|June 14, 2024
PubMed
概括
此摘要是机器生成的。

研究人员通过启用双电子转移化学来增强静态化 (SLB) 电池. 这一突破显著提高了性能和稳定性,为先进的-素电池铺平了道路.

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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:

  • 静态化 (SLB) 电池提供储能潜力,但面临性能限制.
  • 现有的SLB电池受到液体-液体还氧化模式和单电子传输限制的阻碍.

研究的目的:

  • 通过实现双电子转移化学,开发一款高性能SLB电池.
  • 为了克服SLB电池中单电子转移的局限性.

主要方法:

  • 使用酸盐 (NO3-) 和化物 (Cl-) 离子进行电解质裁.
  • 开发一种使用Br-/Br+氧化还原对的活性盐阴极.

主要成果:

  • 通过Br-/Br+氧化还原对实现了两电子转移机制.
  • 观察到3.8V的电压平原.
  • 与单电子转移基准相比,放电容量增加了142%,能量密度增加了159%.
  • 经过1000个循环证明了出色的稳定性.

结论:

  • 开发的两电子转移机制显著提高了SLB电池的性能和稳定性.
  • 这种方法为-素电池设定了新的基准,并为未来素电池开发提供了一个模型.