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相关概念视频

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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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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改性聚乙烯氧化物固态电解质与聚乙烯化物-六烯)

Jinwei Yan1, Wen Huang2, Tangqi Hu2

  • 1Xiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Key Laboratory of Energy Cleaning Utilization, Development, College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China.

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概括

这项研究通过将聚乙烯氧化物 (PEO) 与聚乙烯化物-六烯 (P(VDF-HFP)) 混合来提高离子电池的安全性,以创建稳定的固态电解质.

关键词:
在P ((VDF-HFP) 中.对于PEO来说,这是一个很好的选择.离子电池的离子电池是什么固态电解质 固态电解质

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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
  • 聚合物科学 聚合物科学

背景情况:

  • 由于液体电解质的安全问题,离子电池面临限制,包括化学稳定性和易燃性差.
  • 固体电解质为提高电池安全性和性能提供了一个有希望的替代品.

研究的目的:

  • 提高基于聚乙烯氧化物 (PEO) 的聚合物电解质的性能,通过将它们与聚乙烯化物-六烯 (P(VDF-HFP)) 混合.
  • 为了研究P(VDF-HFP) 添加对基于PEO的固体电解质的结构和电化学特性的影响.

主要方法:

  • 将PEO与不同度的P(VDF-HFP) 混合在一起,形成聚合物电解质膜.
  • 离子导电性,电化学窗口,热稳定性和离子转移数的表征.
  • 使用开发的固体电解质膜制造和测试离子电池.

主要成果:

  • 添加P(VDF-HFP) 增加了PEO中的无形域,促进了离子迁移.
  • 最佳的电解质膜 (30% P(VDF-HFP) / 70% PEO) 显示出高离子导电性,宽的电化学窗口和增强的热稳定性.
  • 优化的固体电解质表现出0.45.5的高离子转移数.
  • 电池表现出极好的速率性能和循环稳定性,在200个循环后保持高的特定容量.

结论:

  • 将PEO与P ((VDF-HFP) 混合,有效地提高了离子电池固体聚合物电解质的性能.
  • 开发的固体电解质显示出安全和高性能离子电池应用的巨大潜力.
  • 这种方法为克服与传统液体电解质相关的安全挑战提供了可行的策略.