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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...
Microbial Fuel Cells01:23

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
Ion Exchange01:17

Ion Exchange

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 basic...

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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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不加湿的中温燃料电池使用前离子离子液体.

Seung-Yul Lee1, Atsushi Ogawa, Michihiro Kanno

  • 1Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.

Journal of the American Chemical Society
|June 29, 2010
PubMed
概括

这项研究详细介绍了一种用于非加湿燃料电池的前离子离子液体,二甲基三甲硫酸盐 ([dema][TfO]). 复合膜可以在中间温度下高效运行,对氧燃料电池应用有希望.

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
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 蛋白离子液体 (PILs) 被探索为燃料电池的电解质.
  • 甲基甲基三甲硫酸盐 ([dema][TfO]) 正在研究其质子导电性.
  • 在中等温度下非加湿的燃料电池运行对传统电解质提出了挑战.

研究的目的:

  • 将[dema][TfO]描述为燃料电池中的质子导体.
  • 在非加湿条件下使用[dema][TfO]制造和评估膜型燃料电池系统.
  • 评估用于燃料电池应用的 [dema][TfO] 的复合膜的性能.

主要方法:

  • [dema][TfO]的物理化学和电化学表征.
  • 使用[dema][TfO]和复合膜制造膜型燃料电池.
  • 评估燃料电池性能,包括开放电路电压 (OCV) 和电流密度.
  • 对质子导电机制和转移数的分析.

主要成果:

  • [dema][TfO]在Pt电极上的氧化和氧降解反应中表现出高活性.
  • 使用[dema][TfO]的燃料电池在150°C时达到1.03V的OCV.

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  • 多达80%重量[dema][TfO]的复合膜显示出良好的热稳定性,离子导电性和机械强度.
  • 在非加湿条件下从30-140°C运行,在120°C时达到250 mA cm-2的复合膜燃料电池.

    • 结论:

    • [dema][TfO] 是非加湿燃料电池的可行的质子导体.
    • 质子导电涉及载体和质子交换机制,避免了细胞极化.
    • 复合膜提供了出色的性能和与[dema][TfO]的兼容性.
    • 开发的系统是一个有希望的候选人非加湿的H2O2燃料电池.