Electrochemical investigations of high-voltage Na4Ni3(PO4)2P2O7 cathode for sodium-ion batteries
Journal Article
·
· Journal of Solid State Electrochemistry
- Hamad Bin Khalifa Univ., Qatar Foundation, Doha (Qatar). Qatar Environment and Energy Research Inst. (QEERI)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Institute Charles Gerhardt, Montpellier (France)
- Karlsruhe Inst. of Technology (KIT) (Germany)
In this work, the electrochemical properties of carbon and reduced graphene-coated Na4Ni3(PO4)2P2O7 materials have been evaluated as high-voltage positive electrodes for sodium-ion batteries. Na4Ni3(PO4)2P2O7 exhibits the highest Ni3+/Ni2+ redox potential of 4.8 V vs. Na+/Na with a theoretical capacity of 127 mAh g-1. Here, we report on the synthesis and characterizations of Na4Ni3(PO4)2P2O7-reduced graphene oxide and Na4Ni3(PO4)2P2O7-carbon composites. The high-voltage dimethyl carbonate–based electrolyte has been chosen to explore the electrochemical properties of Na4Ni3(PO4)2P2O7 as a cathode. Carbon-coated Na4Ni3(PO4)2P2O7 composite electrode delivers a stable discharge capacity of 51 mAh g-1 at 0.1 C rate for 40 cycles which corresponds to a reversible intercalation/de-intercalation of 1.3 sodium ions. The structural deformation has been observed during the charge–discharge process beyond the removal of 1.3 Na+ ions and has been confirmed by in situ PXRD measurements. The present results provide a guideline to improve the performances of the high-voltage Na4Ni3(PO4)2P2O7 material for the next generation sodium-ion batteries.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- Qatar National Research Fund (QNRF); USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1608198
- Journal Information:
- Journal of Solid State Electrochemistry, Journal Name: Journal of Solid State Electrochemistry Journal Issue: 1 Vol. 24; ISSN 1432-8488
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
A High‐Energy NASICON‐Type Cathode Material for Na‐Ion Batteries
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journal | March 2020 |
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