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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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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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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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Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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相关实验视频

Updated: Jul 23, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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稳定的多元件多相所有活性材料离子电池阳极

Chen Cai1, Lin Gao2, Tao Sun2

  • 1Department of Chemical Engineering, University of Virginia, 102 Engineers Way, Charlottesville, Virginia 22904-4741, United States.

ACS applied materials & interfaces
|July 11, 2023
PubMed
概括
此摘要是机器生成的。

开发先进的离子电池需要创新的电极设计. 使用TiNb2O7和MoO2混合物的多元件全活性材料 (AAM) 阳极显著提高体积能量密度,速率能力和周期寿命.

关键词:
所有活性物质的电极.电子导电性的电子导电性.离子电池是一种离子电池.多元组件材料是多元组件材料.透的透是一种透.

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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:

  • 离子电池 (LIB) 对于储能至关重要,通过电极工程来提高能量密度.
  • 全活性材料 (AAM) 电极在机械稳定性和离子传输方面具有优势,但需要具有良好的电子导电性和受控体积变化的电活性材料.
  • TiNb2O7 (TNO) 和MoO2 (MO) 是AAM电极的有希望的材料,分别提供高体积能量密度和电子导电性.

研究的目的:

  • 研究多元组件全活性材料 (AAM) 阳极,以提高离子电池的性能.
  • 为了评估TiNb2O7 (TNO) 和MoO2 (MO) 的混合物作为AAM阳极,这是AAM电极开发中的一种新方法.
  • 确定是否结合TNO和MO可以克服单个材料的局限性,以增强电化学循环.

主要方法:

  • 由单元TNO,单元MO和各种TNO-MO混合物组成的全活性材料 (AAM) 阳极的制造和电化学测试.
  • 电极架构和微观结构的表征,以了解组件比率的影响.
  • 性能评估包括体积能量密度,速率能力和长期循环寿命.

主要成果:

  • 多组件TNO-MO AAM阳极表现出优越的性能,相比单组件TNO和MO阳极.
  • 结合TNO和MO的电极实现了最高的体积能量密度.
  • 优化的TNO-MO混合物表现出增强的速率能力和延长的循环寿命,表明稳定性和导电性得到改善.

结论:

  • 在AAM阳极中使用多元组件材料是推进离子电池技术的可行策略.
  • 混合TiNb2O7和MoO2有效地利用它们各自的优势,从而显著改善能量密度,速率性能和循环稳定性.
  • 这项研究为设计下一代储能系统的高性能AAM电极建立了新的途径.