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相关概念视频

Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
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...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
Supercritical Fluid Chromatography01:18

Supercritical Fluid Chromatography

Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...

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在聚氨基基凝聚合物电解质中通过多重结合进行调节相位分离,用于全固态超级电容器的凝聚合物电解质.

Puji Lestari Handayani1, U Hyeok Choi1

  • 1Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering, Inha University, Incheon, 22212, South Korea.

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概括

使用热塑性聚氨和离子液体开发出具有增强离子导电性和机械强度的混合凝聚合物电解质 (GPEs). 这些GPE显示了先进的全固态储能器件的前景.

关键词:
所有固态超级电容器都是固态超级电容器.通过联结,形成联结.离子液体是有离子的液体.石纳米颗粒的使用方法热塑性聚氨是一种热塑性聚氨.

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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:

  • 开发稳定和高效的电解质对于先进的储能设备至关重要.
  • 混合凝聚合物电解质 (GPEs) 与液体电解质相比,具有潜在的优势,包括提高安全性和机械完整性.
  • 热塑性聚氨 (PU) 和离子液体 (IL) 由于其可加工性和离子导电性,是GPEs有前途的组件.

研究的目的:

  • 合成基于热塑性聚氨 (PU) 和离子液 (IL) 的新型混合凝聚合物电解质 (GPEs).
  • 研究纳米颗粒对PU-IL GPEs的结构,特性和性能的影响.
  • 评估这些GPE在全固态超级电容器中的潜力.

主要方法:

  • 一 in situ sol-gel 工艺用于合成混合GPEs.
  • 在PU矩阵中将1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 的离子液和二氧化纳米粒子纳入PU矩阵.
  • 使用富里埃变换红外 (FTIR) 光谱和差分扫描热量计 (DSC) 进行表征.
  • 在全固态超级电容器中的电化学性能评估.

主要成果:

  • 增加IL度削弱了结,降低了玻璃过渡温度,并抑制了相位分离.
  • 纳米颗粒诱导了相分离,并增强了室温离子导电性和机械强度.
  • 混合GPE在3.5V时表现出高能量密度 (183Wh kg-1) 和功率密度 (7kW kg-1).
  • 超级电容器表现出极好的循环稳定性,在12000次循环后保持98%的电容.

结论:

  • 开发的混合GPEs具有离子导电性和机械强度的独特组合.
  • 纳米颗粒的结合是一种有效的策略,可以调整GPE的形态,并提高其电化学性能.
  • 这些GPE是下一代全固态储能器件的有希望的候选者.