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相关概念视频

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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Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

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Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
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Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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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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Electrolyte and Nonelectrolyte Solutions02:21

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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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Batteries and Fuel Cells03:12

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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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基于聚胺的水性储能系统使用缩的WiSE电解质.

Gudla Vardhini1, Patoju Sai Dilip2, Sreelakshmi Anil Kumar1

  • 1School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM), Maruthamala PO, Vithura, Kerala 695551, India.

ACS applied materials & interfaces
|January 2, 2024
PubMed
概括

本研究介绍了PDI-urea作为水性电池的新型阳极,在超缩电解质中表现出卓越的性能和稳定性,用于可持续的能量存储.

关键词:
水性离子电池水性离子电池水性双离子电池水性双离子电池有机电极是有机电极.聚胺是什么? 聚胺是什么?在WiSE的电解质.

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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
  • 可持续能源 可持续能源

背景情况:

  • 水性电池提供环保,经济高效,不易燃的储能解决方案.
  • 有机电极材料提高了电池系统的可持续性和鱼性.
  • 超缩电解质 (WiSE) 扩大了水性电池的电化学稳定性窗口.

研究的目的:

  • 引入PDI-尿素作为一种用于水性储能的新型阳极材料.
  • 为了评估PDI-尿素在各种盐水电解质中的电化学性能.
  • 评估PDI-urea在全电池配置中的可行性,例如水性双离子电池和K离子电池.

主要方法:

  • 在三种WiSE电解质 (酸盐,酸盐,KFSI) 中对PDI-尿素阳极进行电化学性能测试.
  • 在KFSI电解质中使用PDI-尿素阳极和PBA阴极制造和测试全电池设备 (APDIB和AKIB).
  • 使用ex-situ研究进行机制分析.

主要成果:

  • 在WiSE中,PDI-尿素阳极表现出良好的电化学性能.
  • 全电池K离子电池 (PDI-尿素阳极/PBA阴极) 在1000个循环中显示出91%的容量保留.
  • 该研究系统地分析了电极反应机制.

结论:

  • PDI-尿素是水性储能系统的有前途的阳极材料.
  • 超缩的电解质显著提高了水性电池的性能.
  • 开发的水性离子电池显示出出色的循环稳定性和实际应用的潜力.