Journal
CERAMICS INTERNATIONAL
Volume 45, Issue 9, Pages 11600-11606Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.03.031
Keywords
Nanocomposite; Na3V2(PO4)(3)@C; Phosphorus-doped graphene; Performance
Categories
Funding
- Program for Advantageous Characteristic Discipline Construction in the Education Department of Shanxi Province (1331 Program) [2050205]
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NASICON-type Na3V2(PO4)(3) is a promising cathode for sodium-ion batteries owing to its low cost and great thermal stability as well as high energy density, which has attracted ever growing attention. Nevertheless, the pure Na3V2(PO4)(3) possesses a bad electrical conductivity, which hinders its Na(+-)storage performance for energy storage. Designing and fabrication of the phosphorus-doped graphene-decorated Na3V2(PO4)3(@)C nanocomposite is performed in this research by a simple and rapid method. The constructed network by phosphorus-doped graphene sheet and carbon layer can greatly strengthen the electron and ionic conductivities of Na3V2(PO4)(3), leading to outstanding rate capacity together with cyclic property. The as-fabricated electrode shows a specific capacity of 110.6 mAh g(-1) at 0.5 C and a high capacity retention of 91.2% over 500 cycles at 20 C. Therefore, this designed nanocomposite is thought as a prospective cathode for batteries that utilize sodium ion as the charge carrier.
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