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Updated: Dec 16, 2025
10:03
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
25.9K
High-Efficiency Cathode Sodium Compensation for Sodium-Ion Batteries.
Yu-Bin Niu1, Yu-Jie Guo1, Ya-Xia Yin1,2
1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|July 7, 2020
Summary
Sodium-ion batteries show promise for grid storage. Using sodium oxalate as a cathode additive significantly improves sodium-ion full cell performance by compensating for sodium loss during anode SEI formation.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Sodium-ion batteries (SIFCs) are attractive for large-scale stationary energy storage due to low cost and abundant sodium resources.
- SIFC performance is limited by irreversible sodium ion consumption during hard carbon anode solid electrolyte interphase (SEI) formation.
Purpose of the Study:
- To introduce a novel cathode sodiation compensation reagent to mitigate sodium loss in SIFCs.
- To investigate the mechanism of oxidation potential tuning for the compensation reagent.
Main Methods:
- Proposed sodium oxalate (Na2C2O4) as a high-capacity sacrificial sodium species.
- Tuned the oxidation potential of Na2C2O4 using conductive additives.
- Fabricated and tested SIFCs with hard carbon anodes, P2-Na2/3Ni1/3Mn1/3Ti1/3O2 cathodes, and Na2C2O4 compensation.
Main Results:
- Successfully decreased Na2C2O4 oxidation potential from 4.41 V to 3.97 V.
- Achieved a capacity retention of 85% after 200 cycles, an increase from 63%.
- Enhanced energy density from 129.2 to 172.6 Wh kg-1.
Conclusions:
- Sodium oxalate effectively compensates for sodium loss during SEI formation in SIFCs.
- The developed method significantly enhances SIFC cycle stability and energy density.
- This approach offers a promising strategy for advancing SIFC technology.
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