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Related Concept Videos

Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

1.3K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
1.3K
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

1.0K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
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Precipitation Processes01:12

Precipitation Processes

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The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
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Colloidal precipitates01:09

Colloidal precipitates

468
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...
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Precipitation of Ions03:11

Precipitation of Ions

27.4K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
27.4K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

16.6K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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Related Experiment Video

Updated: May 20, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Solid solution reaction enhanced rapid sodium ion Migration for superior Low-Temperature performance.

Jiao Li1, Jianfeng Ban2, Zhuoyan Zeng1

  • 1College of Chemistry, Xiangtan University, Xiangtan 411105, China.

Journal of Colloid and Interface Science
|May 17, 2025
PubMed
Summary

This study developed a novel layered cathode material for sodium-ion batteries (SIBs) that maintains excellent performance in cold temperatures. The new material ensures reliable energy storage solutions for grid applications even in subzero environments.

Keywords:
Cathode materialLong cycleLow temperatureSodium-ion battery

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Sodium-ion batteries (SIBs) are promising for grid storage due to abundant sodium resources.
  • SIBs performance is highly sensitive to temperature, especially in subzero conditions, limiting their application.
  • Developing reliable SIBs for diverse temperature environments is a critical challenge.

Purpose of the Study:

  • To create a layered cathode material with enhanced electrochemical performance at low temperatures.
  • To investigate the impact of multi-doping on the structural stability and cycling performance of SIB cathodes.
  • To provide insights for advanced cathode materials for reliable energy storage.

Main Methods:

  • Fabrication of layered cathode materials using a facile sol-gel method.
  • Implementation of a synergistic Cu/Co/Mg multi-doping strategy.
  • Electrochemical performance testing at various temperatures, including -20°C.

Main Results:

  • A novel material, Na0.7Ni0.25Cu0.1Co0.05Mg0.05Mn0.55O2 (NNCCMM), was synthesized with high capacity and structural stability.
  • NNCCMM demonstrated extraordinary cycle stability and fast charging capability at both low and normal temperatures.
  • The capacity retention at -20°C was 81.7% of the room-temperature value at 0.2C.

Conclusions:

  • The Cu/Co/Mg multi-doping strategy effectively enhances the low-temperature performance of SIB cathode materials.
  • NNCCMM offers a promising solution for reliable and versatile sodium-ion battery applications in cold environments.
  • This research expands the potential of SIB technology for grid storage and other cost-sensitive applications.