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相关概念视频

Colloids03:22

Colloids

Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
Solubility03:00

Solubility

Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules, atoms, and/or ions)...
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...
Coagulation01:06

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
The Colloidal State01:29

The Colloidal State

The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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简单的策略,通过层层组装来制备聚离子液) 涂层固体聚合物电解质.

Zongyu Wang1, Bishnu P Thapaliya1, Ilja Popovs1

  • 1Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.

ACS applied materials & interfaces
|October 25, 2023
PubMed
概括
此摘要是机器生成的。

研究人员使用层次组装开发了先进的固体聚合物电解质,用于灵活的金属电池. 这些电解质具有高离子导电性和机械强度,为商业化铺平了道路.

关键词:
原子转移激素聚合的聚合方式碳纳米圈是一个碳纳米圈.金属电池的金属电池是什么颗粒刷子 颗粒刷子 颗粒刷子这是一种多离子液体.

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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
  • 聚合物化学 聚合物化学

背景情况:

  • 固体聚合物电解质对于金属电池 (LMB) 至关重要,但在平衡机械强度和离子导电性方面面临挑战.
  • 层层组装 (LbL) 已经显示出用于制造电化学设备的柔性固体聚合物电解质的潜力.

研究的目的:

  • 开发一种用于构建具有增强离子导电性和机械性能的固体聚合物电解质的新策略.
  • 为了研究这些电解质在金属电池应用中的性能.

主要方法:

  • 使用LbL组件创建超薄的电解质膜,交替使用聚离子和聚离子层.
  • 嵌入的聚离子液体) 骨架和聚乙烯甘醇 (PEG) 侧组,以增强离子传输.
  • 制造出独立的膜,并将它们组装成Li/LiFePO4电池电池.

主要成果:

  • 取得了良好的离子导电性,范围为9.03-10 × 10^-4 S cm^-1.
  • 在Li/LiFePO4电池中,在60°C时具有高的初始放电容量 (143-158 mAhg^-1),并具有高的coulombic效率.
  • 获得了具有优越的离子导电性和机械强度的固体聚合物电解质膜.

结论:

  • 聚合物合成和LbL自组合的结合方法为制造先进的固体聚合物电解质提供了有效的途径.
  • 这些电解质显示出在灵活的电化学设备和高压电池应用中使用的巨大潜力.