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In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
Published on: September 12, 2018
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Efficient K-Storage of Fe-Coupled Organic Molecule Anode in Ether-Based Electrolytes
Nailu Shen1, Ningning Chen1, Qingxue Lai1
1Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technologies, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|March 8, 2023
Summary
This study introduces a novel iron-based organic electrode material (Fe-NTCDA) for potassium-ion batteries. Optimized electrolytes significantly boost its capacity and rate performance, overcoming limitations of organic electrode materials.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Organic electrode materials (OEMs) offer designable structures and environmental benefits for alkaline metal-ion batteries.
- Current OEMs face challenges with low specific capacity and poor rate performance, limiting their widespread adoption.
Purpose of the Study:
- To develop a novel organic electrode material for enhanced potassium storage.
- To improve the electrochemical performance of organic anodes for potassium-ion batteries.
Main Methods:
- Synthesized a new Fe-NTCDA organic anode by coupling Fe2+ with the NTCDA molecule.
- Optimized potassium storage behavior through electrolyte regulation (3M KFSI/DME).
- Evaluated electrochemical performance, including specific capacity and rate capability.
Main Results:
- The Fe-NTCDA anode exhibits a reduced working potential, making it suitable for anode applications.
- Increased K-storage sites led to significant improvements in electrochemical performance.
- Achieved a high specific capacity of 167 mAh/g after 100 cycles at 50 mA/g and 114 mAh/g at 500 mA/g.
Conclusions:
- The novel Fe-NTCDA organic anode demonstrates promising potential for high-performance potassium-ion batteries.
- Electrolyte optimization is crucial for maximizing the capacity and rate performance of organic electrode materials.
- This work addresses key limitations of OEMs, paving the way for their practical application.
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