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Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery
Published on: July 12, 2016
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Terephthalic Acid Intercalated CoNi-LDH Materials for Improved Li-O2 Battery
Yuran Lin1, Yu Zhang2, Jindi Bao1
1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, China.
Small (Weinheim an Der Bergstrasse, Germany)
|August 2, 2023
Summary
Researchers developed novel CoNi-LDH hollow nanocages for lithium-oxygen batteries. Intercalation with terephthalic acid enhanced structural stability and electrochemical performance, with an optimized material showing superior results after 209 cycles.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Layered CoNi double hydroxides (CoNi-LDH) are promising electrode materials.
- Zeolitic imidazolate framework-67 (ZIF-67) serves as a precursor for nanostructure synthesis.
- Lithium-oxygen (Li-O2) batteries require advanced electrode materials for improved performance.
Purpose of the Study:
- To synthesize CoNi-LDH hollow nanocages via Ni ion etching of ZIF-67.
- To enhance the material's structure and electrochemical properties through molecular intercalation.
- To optimize the intercalation process for improved stability and performance in Li-O2 batteries.
Main Methods:
- Synthesis of CoNi-LDH hollow nanocages by etching ZIF-67 with Ni ions.
- Modification of CoNi-LDH structure using molecular intercalation with terephthalic acid.
- Electrochemical testing of the modified materials in Li-O2 batteries.
Main Results:
- Successfully synthesized CoNi-LDH hollow nanocages with specific morphology.
- Terephthalic acid intercalation increased interlayer distance and improved structural support.
- Optimized intercalation (CoNi-LDH-2 with 0.02 mmol terephthalic acid) demonstrated excellent stability over 209 cycles.
- The intercalated material exhibited superior electrochemical performance in Li-O2 battery applications.
Conclusions:
- Molecular intercalation is an effective strategy to enhance CoNi-LDH properties for Li-O2 batteries.
- Optimizing the amount of intercalation agent is crucial for maintaining structural integrity and electrochemical activity.
- The developed CoNi-LDH-2 material shows significant potential for next-generation energy storage devices.
