Related Experiment Video
Updated: Dec 1, 2025
11:04
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
13.3K
Strategies for Mitigating Dissolution of Solid Electrolyte Interphases in Sodium-Ion Batteries
Le Anh Ma1, Andrew J Naylor1, Leif Nyholm1
1Department of Chemistry-Ångström Laboratory, Uppsala University, 75121, Uppsala, Sweden.
Angewandte Chemie (International Ed. in English)
|November 10, 2020
Summary
Understanding solid electrolyte interphase (SEI) dissolution in sodium-ion batteries (SIBs) is key. This study reveals SEI component solubility impacts battery self-discharge, offering insights to improve SIB stability.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Interfacial reactions in sodium-ion batteries (SIBs) remain poorly understood.
- Achieving a stable solid electrolyte interphase (SEI) is challenging due to component solubility issues, unlike in lithium-ion systems.
Purpose of the Study:
- To investigate the influence of electrolyte chemistry on SEI dissolution in SIBs.
- To quantify the extent of self-discharge caused by SEI dissolution.
Main Methods:
- Electrochemical tests with extended open circuit pauses.
- Surface spectroscopy analysis.
- Use of β-alumina as a sodium-conductive membrane to prevent electrode crosstalk.
Main Results:
- Capacity loss up to 30% observed after 50-hour open circuit pauses in tested electrolytes.
- Determined the solubility of inorganic SEI components like sodium fluoride (NaF) and sodium carbonate (Na2CO3).
- Electrolytes were saturated with SEI species to mitigate dissolution-induced aging.
Conclusions:
- SEI dissolution significantly contributes to self-discharge in SIBs.
- Understanding and controlling SEI component solubility is crucial for enhancing SIB performance and longevity.
- Strategies like electrolyte saturation with SEI species show promise for improving battery stability.
Related Concept Videos
01:19Ionic Strength: Effects on Chemical Equilibria
2.2K
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...
In this solution, the primary...
2.2K
02:21Electrolyte and Nonelectrolyte Solutions
69.6K
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
69.6K
03:45Formation of Complex Ions
25.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
25.0K
02:28Intermolecular Forces in Solutions
37.4K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
37.4K
02:48Ionic Bonding and Electron Transfer
47.7K
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.
47.7K
03:11Precipitation of Ions
29.2K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
29.2K