Related Experiment Video
Updated: Feb 18, 2026
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
13.5K
Catholyte Formulations for High-Energy Li-S Batteries
Satyajit Phadke1, Erwan Coadou1, Mérièm Anouti1
1Université François Rabelais , Laboratoire PCM2E, Parc de Grandmont, 37200 Tours, France.
The Journal of Physical Chemistry Letters
|November 18, 2017
Summary
This study introduces organyl disulfides to lithium-sulfur (LiS) batteries, significantly improving capacity and efficiency by minimizing soluble polysulfides. This innovation enhances LiS battery performance and longevity.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Lithium-sulfur (LiS) batteries face challenges with sulfur electrode degradation.
- Soluble polysulfides cause rapid capacity loss and low efficiency in LiS batteries.
Purpose of the Study:
- To enhance capacity utilization and retention in LiS batteries.
- To improve the overall efficiency of LiS batteries using novel catholyte formulations.
Main Methods:
- Incorporation of redox-active organyl disulfides (PhS2Ph) into catholyte formulations.
- Electrolyte analysis of chemical equilibria between sulfur/polysulfides and disulfide/thiolates.
- Galvanostatic cycling of LiS batteries with the formulated catholyte.
Main Results:
- Suppression of soluble polysulfide formation (Sx2-, x > 4), minimizing the polysulfide redox shuttle.
- Achieved a stable capacity of 1050 mAh·g−1 at C/5 with >99.5% Coulombic efficiency.
- Demonstrated stable cycling at 1C over 500 cycles at 45 °C with >900 mAh·g−1 capacity and 82% energy efficiency.
Conclusions:
- Organyl disulfide additives effectively stabilize LiS batteries.
- The novel catholyte formulation significantly enhances LiS battery performance and durability.
Related Concept Videos
03:12Batteries and Fuel Cells
31.2K
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...
31.2K
04:02Weak Acid Solutions
43.7K
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...
43.7K
02:48Ionic Bonding and Electron Transfer
50.6K
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.
50.6K
03:02Standard Electrode Potentials
50.7K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
50.7K