Volume 44 Issue 4
Aug.  2023
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Li Nali, Zhang Renjie. Effect of glucose content on the lithium storage performance of Li3V2(PO4)3/C cathode materials prepared by sol-gel combustion method[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(4): 41-47. doi: 10.7513/j.issn.1004-7638.2023.04.006
Citation: Li Nali, Zhang Renjie. Effect of glucose content on the lithium storage performance of Li3V2(PO4)3/C cathode materials prepared by sol-gel combustion method[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(4): 41-47. doi: 10.7513/j.issn.1004-7638.2023.04.006

Effect of glucose content on the lithium storage performance of Li3V2(PO4)3/C cathode materials prepared by sol-gel combustion method

doi: 10.7513/j.issn.1004-7638.2023.04.006
  • Received Date: 2023-04-19
  • Publish Date: 2023-08-30
  • In this paper, submicrometer porous Li3V2(PO4)3 (LVP)/C composites with different carbon contents were successfully prepared by a modified sol-gel combustion method by changing the amount of glucose added. The effects of glucose addition on the structure, morphology and electrochemical properties of LVP were systematically studied. Although the addition of glucose did not change the crystal structure and lattice parameters of LVP, nanoneedle-like particles appeared in the samples with glucose, which were beneficial to electron transport and Li+ diffusion. With the increase of glucose content, the volume fraction of nanoneedle-like particles increased, thus improving the rate performance of LVP/C cathode materials. The amorphous carbon generated by carbonization of glucose is evenly coated on the surface of LVP particles, which improves the conductivity of the composites. The conductivity increases with the increase of glucose content. However, excessive glucose addition will lead to too thick carbon coating, which is not conducive to the transmission of Li+. Benefiting from the appropriate amount of glucose addition, nanoneedle-like particles and porous structure, LVP/C-G15% sample has excellent lithium storage performance. It can still provide a discharge specific capacity of 75.1 mAh/g after 200 cycles at a high rate of 10 C, and the capacity retention rate is as high as 89.0%.
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