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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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...
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

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,...
Electrolysis03:00

Electrolysis

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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相关实验视频

Updated: Jul 12, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

一个固体硫阴极用于水性电池.

D Peramunage, S Licht

    Science (New York, N.Y.)
    |August 20, 1993
    PubMed
    概括

    研究人员开发了一种用于室温电池的新型元素硫阴极,达到理论容量的90%以上. 这一突破利用水性多硫化物接口来提高硫电池的电活性.

    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:

    • 硫的高电阻性和低电活性通常阻止其作为室温电池阴极的使用.
    • 传统电池设计在环境温度下实现高能量密度和容量方面存在局限性.

    研究的目的:

    • 为了克服硫作为室温电池的阴极材料的局限性.
    • 开发一种使用水性多硫化物接口的高容量元素硫阴极.
    • 为了评估硫电池系统的性能.

    主要方法:

    • 一个元素硫阴极的制造.
    • 实现一种轻质,导电,水性多硫化物接口.
    • 电催化反应:S + H(2) O + 2e(-) --> HS(-) + OH(-). 在电催化反应中,
    • 使用新型阴极组装和测试一个硫电池.

    主要成果:

    • 硫阴极的测量容量超过900安培小时/公斤,超过理论容量的90%.
    • 这种硫电池的电池电位为1.3伏特.
    • 实验的特定能量达到每公斤高达220瓦时,理论潜力为每公斤910瓦时.

    更多相关视频

    Zinc-Sponge Battery Electrodes that Suppress Dendrites
    06:58

    Zinc-Sponge Battery Electrodes that Suppress Dendrites

    Published on: September 29, 2020

    A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
    09:49

    A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery

    Published on: February 13, 2017

    相关实验视频

    Last Updated: Jul 12, 2026

    Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
    10:03

    Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

    Published on: November 11, 2013

    Zinc-Sponge Battery Electrodes that Suppress Dendrites
    06:58

    Zinc-Sponge Battery Electrodes that Suppress Dendrites

    Published on: September 29, 2020

    A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
    09:49

    A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery

    Published on: February 13, 2017

    结论:

    • 开发的元素硫阴极通过水性多硫化物接口实现,在室温下显著增强硫的电活性.
    • 硫电池显示出作为高能量密度存储解决方案的前景.
    • 这种方法为下一代电池技术提供了可行的途径.