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Related Concept Videos

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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Facile Strategy to Prepare Poly(ionic liquid)-Coated Solid Polymer Electrolytes through Layer-by-Layer Assembly.

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
Summary
This summary is machine-generated.

Researchers developed advanced solid polymer electrolytes using layer-by-layer assembly for flexible lithium metal batteries. These electrolytes offer high ionic conductivity and mechanical strength, paving the way for commercialization.

Keywords:
atom transfer radical polymerizationcarbon nanospherelithium metal batteriesparticle brushpoly(ionic liquid)s

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Solid polymer electrolytes are crucial for lithium metal batteries (LMBs) but face challenges balancing mechanical strength and ionic conductivity.
  • Layer-by-layer (LbL) assembly has shown promise for creating flexible solid polymer electrolytes for electrochemical devices.

Purpose of the Study:

  • To develop a novel strategy for constructing solid polymer electrolytes with enhanced ionic conductivity and mechanical properties.
  • To investigate the performance of these electrolytes in lithium metal battery applications.

Main Methods:

  • Utilized LbL assembly to create ultrathin electrolyte membranes with alternating polyanion and polycation layers.
  • Incorporated poly(ionic liquid) backbones and polyethylene glycol (PEG) side groups to enhance lithium-ion transport.
  • Fabricated free-standing membranes and assembled them into Li/LiFePO4 battery cells.

Main Results:

  • Achieved good ionic conductivities ranging from 9.03-10 × 10^-4 S cm^-1.
  • Demonstrated high initial discharge capacity (143-158 mAhg^-1) at 60 °C with high coulombic efficiency in Li/LiFePO4 cells.
  • Obtained solid polymer electrolyte membranes with superior ionic conductivity and mechanical robustness.

Conclusions:

  • The combined approach of polymer synthesis and LbL self-assembly provides an effective route for fabricating advanced solid polymer electrolytes.
  • These electrolytes show significant potential for use in flexible electrochemical devices and high-voltage battery applications.