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Identifying Protein-protein Interaction Sites Using Peptide Arrays
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Identifying Active Sites for Parasitic Reactions at the Cathode-Electrolyte Interface.
Yingying Xie1,2, Han Gao1, Jihyeon Gim1
1Chemical Sciences and Engineering Division , Argonne National Laboratory , 9700 South Cass Avenue , Lemont , Illinois 60439 , United States.
The Journal of Physical Chemistry Letters
|January 23, 2019
Summary
Partially coordinated transition metal atoms on nickel-rich cathode surfaces drive parasitic reactions in lithium batteries. Understanding these active sites is key for improving battery life and safety through interfacial engineering.
Area of Science:
- Materials Science
- Electrochemistry
- Computational Chemistry
Background:
- Nickel-rich transition metal oxides offer high voltage and capacity for advanced lithium batteries.
- Enhancing the cathode-electrolyte interface stability is crucial for these high-energy-density materials.
Purpose of the Study:
- To identify active sites responsible for parasitic reactions at the cathode-electrolyte interface.
- To investigate these reactions using lithium cobalt oxide (LiCoO2) as a model system.
Main Methods:
- Utilized ab initio calculations for theoretical analysis.
- Conducted experimental validation to confirm findings.
Main Results:
- Identified partially coordinated transition metal atoms on the cathode surface as the primary sites for parasitic reactions.
- Demonstrated a clear correlation between these surface sites and interfacial instability.
Conclusions:
- Partially coordinated transition metal atoms are the key culprits in parasitic reactions.
- This fundamental insight supports targeted interfacial engineering for improved lithium battery performance and safety.
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