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Related Concept Videos

Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

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Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
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Ionic Bonding and Electron Transfer02:48

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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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Related Experiment Video

Updated: Dec 31, 2025

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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Enhanced Surface Interactions Enable Fast Li+ Conduction in Oxide/Polymer Composite Electrolyte.

Nan Wu1,2, Po-Hsiu Chien3, Yumin Qian2

  • 1Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.

Angewandte Chemie (International Ed. in English)
|January 2, 2020
PubMed
Summary
This summary is machine-generated.

Li+-insulating oxides enhance Li+ conductivity in polymer electrolytes. This study shows these oxides improve ion transport and enable stable solid-state Li-metal batteries.

Keywords:
Li-ion conductivityLi-ion transfer mechanismall-solid-state batterycomposite electrolytesolid-state NMR

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Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • Composite polymer electrolytes are crucial for advanced batteries.
  • Lithium-ion (Li+) conductivity in these electrolytes is often limited by ceramic fillers.
  • Li+-conducting oxides are typically preferred over Li+-insulating oxides.

Purpose of the Study:

  • To investigate the potential of Li+-insulating oxides as ceramic fillers in polymer electrolytes.
  • To explore the mechanism of Li+ transport enhancement by these insulating oxides.
  • To evaluate the performance of resulting composite electrolytes in all-solid-state Li-metal cells.

Main Methods:

  • Fabrication of poly(ethylene oxide) (PEO)-based composite electrolytes using Li+-insulating oxides (Gd0.1Ce0.9O1.95 and La0.8Sr0.2Ga0.8Mg0.2O2.55).
  • Measurement of Li+ conductivity using electrochemical impedance spectroscopy.
  • Analysis of Li+ ion environments using Li solid-state Nuclear Magnetic Resonance (NMR).
  • Assembly and testing of all-solid-state Li-metal cells.

Main Results:

  • Achieved Li+ conductivity above 10^-4 S cm^-1 at 30°C with both types of Li+-insulating oxides.
  • NMR studies revealed an increase in Li+ ions in the mobile A2 environment (>10%).
  • Observed strong interactions between Li-salt anions and oxide surface oxygen vacancies facilitated Li+ transport.
  • Demonstrated small interfacial resistance and good cycling performance in Li-metal cells at 35°C.

Conclusions:

  • Li+-insulating oxides with high oxygen vacancy concentrations can effectively enhance Li+ conductivity in PEO-based electrolytes.
  • The enhanced conductivity is attributed to improved Li+ ion mobility and interfacial interactions.
  • These composite electrolytes show promise for developing stable and high-performance all-solid-state Li-metal batteries.