Related Experiment Video
Updated: May 6, 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
12.4K
Investigating the Interface of Li{N(SO2F)2}(NCCH2CH2CN)2 Molecular Crystal Electrolytes for 5 V Class Solid-State
Ruijie Zheng1, Shigeru Kobayashi2, Mana Ogawa3
1School of Materials and Chemical Technology, Institute of Science Tokyo, Tokyo 152-8552, Japan.
ACS Applied Materials & Interfaces
|March 28, 2025
Summary
Molecular crystal solid electrolytes, Li(FSA)(SN)2, show promise for high-energy batteries. Protecting the interface with Li3PO4 prevents degradation, enabling stable 5 V solid-state battery operation.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- Molecular crystals like Li(FSA)(SN)2 are advanced solid electrolytes.
- Investigating interfaces is crucial for applying these electrolytes in high-voltage batteries.
Purpose of the Study:
- To examine the interface between Li(FSA)(SN)2 and 5 V LiNi0.5Mn1.5O4 (LNMO) electrodes.
- To assess the impact of an amorphous Li3PO4 interlayer on interface stability and battery performance.
Main Methods:
- Utilized modeled thin-film batteries to study the Li(FSA)(SN)2|LNMO interface.
- Analyzed interface degradation and the effect of inserting a Li3PO4 layer.
Main Results:
- The Li(FSA)(SN)2|LNMO interface degrades, increasing resistance and causing capacity loss.
- An amorphous Li3PO4 layer effectively stabilized the interface, maintaining low resistance and preventing interphase formation.
- Batteries with the Li3PO4 interlayer retained 96% capacity after 100 cycles.
Conclusions:
- Molecular crystal solid electrolytes can operate in 5 V solid-state batteries.
- The Li3PO4 interlayer is a viable strategy to enhance the stability of Li(FSA)(SN)2-based solid-state batteries.
- This work highlights the potential of molecular crystal solid electrolytes for high-energy-density applications.
Related Concept Videos
02:48Ionic Bonding and Electron Transfer
46.7K
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.
46.7K
02:54Molecular and Ionic Solids
16.5K
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...
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...
16.5K
02:42Ionic Crystal Structures
18.1K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
18.1K
01:26Imperfections in Crystal Structure: Stoichiometric Point Defects
147
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
147