Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 26, Issue 35, Pages 7823-7830Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202000943
Keywords
cathode materials; electrochemistry; Na3V2(PO4)(2)O2F; overpotential; renewable resources; sodium-ion batteries
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Funding
- National Natural Science Foundation of China [91963118]
- Science Technology Program of Jilin Province [20200201066JC]
- 13th Five-Year Science and Technology Research from the Education Department of Jilin Province [JJKH20201179KJ]
- China Postdoctoral Science Foundation [2019M661187]
- National Postdoctoral Program for Innovative Talents [BX20190064]
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Phosphate cathode materials are practical for use in sodium-ion batteries (SIBs) owing to their high stability and long-term cycle life. In this work, the temperature-dependent properties of the phosphate cathode Na3V2(PO4)(2)O2F (NVPOF) are studied in a wide temperature range from -25 to 55 degrees C. Upon cycling at general temperature (above 0 degrees C), the NVPOF cathode retains an excellent charge/discharge performance, and the rate capability is noteworthy, indicating that NVPOF is a competitive candidate as a temperature-adaptive cathode for SIBs. Upon decreasing the temperature below 0 degrees C, the cell performance deteriorates, which may be caused by the electrolyte and Na electrode, based on the study of ionic conductivity and electrode kinetics. This work proposes a new breakthrough point for the development of SIBs with high performance over a wide temperature range for advanced power systems.
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