Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (3): 931-937.doi: 10.19799/j.cnki.2095-4239.2021.0045

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Properties of three-dimensional NZSPO/PAN-PEO-NATFST sodium-battery-composite solid electrolyte

Dangling LIU1(), Shimin WANG1, Zhihui GAO1, Lufu XU1, Shubiao XIA2(), Hong GUO1()   

  1. 1.School of Materials and Energy, Yunnan University, Kunming 650091, Yunnan, China
    2.College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, Yunnan, China
  • Received:2021-02-01 Revised:2021-03-11 Online:2021-05-05 Published:2021-04-30
  • Contact: Shubiao XIA,Hong GUO E-mail:1349460754@qq.com;xiashubiao@163.com;guohong@ynu.edu.cn

Abstract:

The fast ionic conductive inorganic particles of Na3Zr2Si2PO12 (NZSPO) were introduced into polypropylene fine (PAN) nanofibers and used to form the three-dimensional fiber network-reinforced bicontinuous solid electrolyte composites of NZSPO/PAN-[PEO-NaTFST] via the electrospinning method. When the mass ration of NZSPO∶PAN was regulated at 2∶1, a maximum ionic conductivity at room temperature arrived at 3.38×10-5 s/cm, and its electrochemical stability window can be expanded to 4.4 V. Na3V2(PO4)3 and metal Na were adopted as the cathode and anode to assemble an all solid-state sodium-on battery. The reversible capacity of the first cycle was 109.7 mA·h·g-1, which can be maintained at 84.5 mA·h·g-1 after 200 cycles with a high coulomb efficiency near 100% at 0.1 C. Differential scanning calorimetry curves confirmed that the NZSPO-PAN composite fiber can inhibit the crystallization of PEO polymer and accelerate the process of ion transport kinetics at low temperatures.

Key words: composite solid electrolyte, electrochemical performance, sodium ion battery, NZSPO/PAN-[PEO-NaTFST]

CLC Number: