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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
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Rechargeable Na/Cl2 and Li/Cl2 batteries
Guanzhou Zhu1, Xin Tian1, Hung-Chun Tai2
1Department of Chemistry and Bio-X, Stanford University, Stanford, CA, USA.
Nature
|August 26, 2021
Summary
Researchers developed rechargeable sodium/chlorine or lithium/chlorine batteries using advanced carbon electrodes and novel electrolytes. This breakthrough enables high-energy-density storage for future applications.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Primary lithium-thionyl chloride (Li-SOCl2) batteries, invented in the 1970s, offer high energy density but are not rechargeable.
- These primary batteries utilize lithium metal anodes, amorphous carbon cathodes, and SOCl2 catholytes, discharging via lithium oxidation and catholyte reduction.
Purpose of the Study:
- To develop a rechargeable secondary alkali-metal/chlorine battery system.
- To overcome the non-rechargeable limitation of traditional primary lithium-thionyl chloride batteries.
Main Methods:
- Utilized a highly microporous carbon positive electrode.
- Employed a starting electrolyte of aluminum chloride in SOCl2 with fluoride additives.
- Used either sodium or lithium metal as the negative electrode.
Main Results:
- Demonstrated a rechargeable Na/Cl2 or Li/Cl2 battery system.
- Achieved rechargeability via reversible Cl2/NaCl or Cl2/LiCl redox within the microporous carbon.
- Stabilized the negative electrode using a thin alkali-fluoride-doped alkali-chloride solid electrolyte interface.
Conclusions:
- The developed secondary alkali-metal/chlorine batteries are rechargeable due to reversible chlorine redox chemistry in microporous carbon.
- The stabilized negative electrode interface is crucial for the secondary battery's performance.
- This work paves the way for next-generation high-energy-density rechargeable batteries.
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