Related Experiment Video
Updated: Oct 18, 2025
07:20
Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
Published on: January 20, 2023
2.8K
Understanding LiI-LiBr Catalyst Activity for Solid State Li2S/S Reactions in an All-Solid-State Lithium Battery
Hongli Wan1, Bao Zhang1, Sufu Liu1
1Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20740, United States.
Nano Letters
|October 4, 2021
Summary
Researchers enhanced lithium-molybdenum disulfide (Li||MoS2) solid-state batteries by adding catalytic lithium iodide-lithium bromide (LiI-LiBr) and carbon black. This improves ionic conductivity and stability, boosting battery performance and longevity.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-molybdenum disulfide (Li||MoS2) solid-state batteries offer high energy and power density.
- Challenges include energy decay due to lithium sulfide formation with poor conductivity and strong Li-S bonds.
Purpose of the Study:
- To overcome the limitations of Li||MoS2 batteries by enhancing ionic conductivity and redox reversibility.
- To improve the stability and performance of solid-state batteries.
Main Methods:
- Incorporation of catalytic lithium iodide-lithium bromide (LiI-LiBr) compound and carbon black into MoS2.
- Comprehensive simulations, characterizations, and electrochemical evaluations.
Main Results:
- LiI-LiBr significantly reduces Li+/S2- interaction and increases Li2S ionic conductivity.
- MoS2@LiI-LiBr@C||Li cells show high reversible capacity (816.2 mAh g-1) and stability over 100 cycles.
- The additive enhances reaction kinetics and Li2S/S redox reversibility.
Conclusions:
- The LiI-LiBr-carbon additive effectively enhances the cyclic and rate performance of MoS2-based solid-state batteries.
- This approach is broadly applicable to transition-metal sulfide cathodes for improved energy storage.
Related Concept Videos
02:48Ionic Bonding and Electron Transfer
44.3K
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.
44.3K
03:12Batteries and Fuel Cells
28.7K
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...
28.7K
03:45Formation of Complex Ions
24.4K
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...
24.4K
01:19Acid Halides to Alcohols: LiAlH4 Reduction
3.2K
Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
3.2K