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Related Concept Videos

The Electrical Double Layer01:30

The Electrical Double Layer

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In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
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Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
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Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
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The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
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Related Experiment Video

Updated: Mar 9, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Dual-layer hybrid solid electrolyte for improved interfacial stability in solid-state lithium batteries.

Min-Jae Kim1, Ji-Hwan Kim1, Ji-Min Hong1

  • 1Department of Chemical Engineering, Soongsil University, Seoul 06978, Republic of Korea.

Journal of Colloid and Interface Science
|March 7, 2026
PubMed
Summary

A novel dual-layer hybrid solid electrolyte (HSE) enhances solid-state lithium battery performance by improving interfacial compatibility. This design boosts ionic conductivity and stability for safer, high-performance batteries.

Keywords:
Dual-layer structureHybrid solid electrolyteLi(1.3)Al(0.3)Ti(1.7)(PO(4))(3)Poly(vinylidene fluoride-co-hexafluoropropylene)Solid-state lithium batteriesZr doping

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Hybrid solid electrolytes (HSEs) combine polymer and ceramic advantages for solid-state lithium batteries (SSLBs).
  • Single-layer electrolytes face performance degradation due to interfacial incompatibility with electrodes.
  • Addressing interfacial challenges is crucial for advancing high-performance SSLBs.

Purpose of the Study:

  • To design and investigate a dual-layer structured electrolyte for SSLBs.
  • To enhance electrochemical performance by optimizing interfacial compatibility with both cathode and anode.
  • To improve ionic conductivity, mechanical properties, and cycling stability.

Main Methods:

  • Synthesized a dual-layer hybrid solid electrolyte using Zr-doped Li₁.₃Al₀.₃Ti₁.₇(PO₄)₃ (LAZTP).
  • Characterized ionic conductivity, mechanical properties (tensile strength, Young's modulus), and Li plating/stripping stability.
  • Fabricated and tested LiFePO₄ (LFP)/LAZTP dual HSE/Li SSLBs.

Main Results:

  • The LAZTP dual HSE achieved high ionic conductivity (5.0 × 10⁻⁴ S cm⁻¹).
  • Improved mechanical properties were observed (tensile strength 6.32 MPa, Young's modulus 30.9 MPa).
  • Demonstrated stable Li plating/stripping for 500 hours and excellent battery performance (155.7 mAh g⁻¹ at 0.5C, 92.6% retention over 200 cycles).

Conclusions:

  • The dual-layer electrolyte design effectively addresses interfacial incompatibility in SSLBs.
  • The developed LAZTP dual HSE offers superior ionic conductivity, mechanical strength, and electrochemical stability.
  • This work presents a promising strategy for developing next-generation high-performance solid-state lithium batteries.