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Ceramics international v.43 no.6, 2017년, pp.4950 - 4956   SCI SCIE SCOPUS
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High performance Na3V2(PO4)3 cathode prepared by a facile solution evaporation method for sodium-ion batteries

Zheng, Li-Li (MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001 China ); Xue, Yuan (MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001 China ); Liu, Bao-Sheng (MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001 China ); Zhou, Yu-Xiang (MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001 China ); Hao, Su-E. (MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Eng ); Wang, Zhen-bo ( );
  • 초록  

    Abstract Based on its abundance and low cost, sodium based batteries have aroused extensive attention for large scale energy-storage systems. In the current work, Na 3 V 2 (PO 4 ) 3 prepared by a facile solution evaporation method (denoted as NVP-SE) is used as cathode materials for sodium ion battery, with a control sample by solid state method. Raman spectrum and TEM are used to study the carbon layer coated on NVP-SE. The results show a highly graphitization and well-coated carbon layer, which is predominant by sp 2 carbon. Graphitized carbon leads to high electrical conductivity, which can improve the rate performance of Na 3 V 2 (PO 4 ) 3 materials. Besides, GITT tests show high Na-ion diffusion coefficient. Even at 30C, the NVP-SE cathode still delivers a capacity of 70mAhg −1 . Moreover, the material also shows great long term cycling performance. After 500 cycles at 1C rate and 1000 cycles at 5C, its discharge capacities are still 103.3mAhg −1 and 85.4mAhg −1 , which maintain 92.6% and 85.0% of its initial capacity. Thus, simple preparation process and excellent electrochemical performance for Na 3 V 2 (PO 4 ) 3 /C extend it as a potential material for high power applications.


  • 주제어

    Sodium-ion batteries .   Na3V2(PO4)3 .   Graphene-like carbon layer .   Solvent evaporation method.  

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