TY - JOUR
T1 - Effects of calcination temperature on electrochemical properties of cathode material Na4MnV(PO4)3/C synthesized by sol-gel method for sodium-ion batteries
AU - Cheng, Siqi
AU - Li, Wenna
AU - Xiao, Shunhua
AU - Zheng, Shuai
AU - Chen, Zhuo
AU - Hu, Lizhen
AU - Zhu, Qing
AU - Huang, Bin
AU - Liu, Qingquan
AU - Chen, Quanqi
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/1/5
Y1 - 2021/1/5
N2 - The effects of calcination temperature on the physical and electrochemical performance of the Na4MnV(PO4)3/C composites, which are prepared by a sol-gel method combined with the subsequent calcination in inert atmosphere, are reported in this work. The Na4MnV(PO4)3/C composites are investigated by x-ray diffraction (XRD), N2 adsorption/desorption isothermal, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and electrochemical measurements. The specific surface area, disorder of carbon, diffusion coefficients of Na+ (DNa) and electrochemical performance of Na4MnV(PO4)3/C composites are greatly influenced by the calcination temperature. The surface area and disorder of carbon of Na4MnV(PO4)3/C substantially decrease with the calcination temperature increasing. While the DNa and electrochemical performance of Na4MnV(PO4)3/C composites improve with the calcination temperature from 650 to 750 °C and then degrade with the calcination temperatures from 750 to 850 °C. The results reveal that the optimal calcination temperature for the Na4MnV(PO4)3/C composites is 750 °C and the corresponding Na4MnV(PO4)3/C composite possesses the highest capacity and the best rate capability and cyclability amongst all these Na4MnV(PO4)3/C composites in this work.
AB - The effects of calcination temperature on the physical and electrochemical performance of the Na4MnV(PO4)3/C composites, which are prepared by a sol-gel method combined with the subsequent calcination in inert atmosphere, are reported in this work. The Na4MnV(PO4)3/C composites are investigated by x-ray diffraction (XRD), N2 adsorption/desorption isothermal, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy and electrochemical measurements. The specific surface area, disorder of carbon, diffusion coefficients of Na+ (DNa) and electrochemical performance of Na4MnV(PO4)3/C composites are greatly influenced by the calcination temperature. The surface area and disorder of carbon of Na4MnV(PO4)3/C substantially decrease with the calcination temperature increasing. While the DNa and electrochemical performance of Na4MnV(PO4)3/C composites improve with the calcination temperature from 650 to 750 °C and then degrade with the calcination temperatures from 750 to 850 °C. The results reveal that the optimal calcination temperature for the Na4MnV(PO4)3/C composites is 750 °C and the corresponding Na4MnV(PO4)3/C composite possesses the highest capacity and the best rate capability and cyclability amongst all these Na4MnV(PO4)3/C composites in this work.
KW - Calcination temperature
KW - Cathode
KW - Electrochemical properties
KW - Sodium manganese vanadium phosphate
KW - Sol-gel
UR - http://www.scopus.com/inward/record.url?scp=85089726542&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2020.156707
DO - 10.1016/j.jallcom.2020.156707
M3 - Article
AN - SCOPUS:85089726542
SN - 0925-8388
VL - 850
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 156707
ER -