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相关概念视频

Valence Bond Theory02:42

Valence Bond Theory

9.1K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Crystal Field Theory - Octahedral Complexes02:58

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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Ion Exchange01:17

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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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具有超质子导电性的CsHSO4-协调聚合物玻璃

Nattapol Ma1, Nao Horike2, Loris Lombardo2

  • 1Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.

Journal of the American Chemical Society
|October 3, 2022
PubMed
概括
此摘要是机器生成的。

我们开发了一种基于CsHSO4的新型玻璃系统, 这一突破为先进的应用提供了高导电性,可处理性和透明的质子导体.

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科学领域:

  • 材料科学
  • 固态化学
  • 电化学

背景情况:

  • 硫酸 (CsHSO4) 的超质子相过渡使得质子传导速度快,但需要温度高于141°C.
  • 现有的CsHSO4材料因其高工作温度和缺乏可加工性而受到限制.
  • 开发在较低温度下高效运行且易于制造的固体质子导体对于技术进步至关重要.

研究的目的:

  • 在低于过渡点的温度下保持超质子导电性的CsHSO4基材料.
  • 提高CsHSO4的可加工性,使设备更容易制造.
  • 研究新材料系统中增强的质子导电性的结构起源.

主要方法:

  • 形成一个双 CsHSO4 协调聚合物玻璃系统,表现出融.
  • 在不同温度范围内测量无水质子导电性.
  • 使用固态核磁共振 (NMR) 和X射线对分布函数进行表征.
  • 材料粘度和薄膜特性 (电阻,透明度) 的评估.

主要成果:

  • CsHSO4玻璃系统的无水质子导电率低于141°C,比原始的CsHSO4高出三倍.
  • 在没有加湿的情况下,该材料在高温下保持高导电性 (在180°C时保持6.3 mS cm−1).
  • 在65°C的低温下达到可加工粘度 (<103 Pa·s).
  • 结构分析显示氧离子交换是保持导电性的关键.
  • 证明了微米级薄膜质子导体的制备,具有低电阻率和高光学透明度 (>85%在380-800nm之间).

结论:

  • 开发的CsHSO4协调聚合物玻璃系统成功地在过渡温度下保持超质子导电性.
  • 这种材料具有高质子导电性,低温可加工性和光学透明度的独特组合.
  • 这些发现为制造各种应用的先进,高效和多功能固态质子导体铺平了道路.