Journal
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume 44, Issue 6, Pages 4586-4594Publisher
WILEY
DOI: 10.1002/er.5239
Keywords
cathode materials; Na3V2(PO4)(3); N-doped carbon layer; polyaniline; sodium-ion batteries
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Funding
- Fundamental Research Funds in Henan University of Technology [2018RCJH01]
- Innovation Talents Program of Henan Province [18HASTIT008]
- Zhongyuan Youth Talent Support Program of Henan Province [ZYQR201810139]
- PSF of China [2017M621833]
- National Natural Science Foundation of China [21773057, U1704142]
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Polyaniline-derived N-doped carbon-composited Na3V2(PO4)(3) (NVP@NC) are synthesized by a rheological phase reaction followed by calcination. The NVP@NC composite displays improved cycling and rate properties. Its discharge capacity remains 118.7 mAh g(-1) at the 400th cycle at 0.3 C. It also obtains invertible capacities of 93.7 and 91.1 mAh g(-1) at 5 and 10 C after 1000 cycles, with capacity retention rates of 92.7% and 98.4%, respectively. These enhanced results due to the N-doped carbon layer (NC), which restrains the expansion and deformation of the crystal structure, reduce the transport length of sodium ion and electrons and improves the electroconductibility of NVP.
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