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<p>This paper presents the successful synthesis of Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> (LVP)/C samples with different carbon sources and carbon contents by introducing metal-organic framework (MOF)-derived carbon, glucose-derived carbon, and sucrose-derived carbon during the sol-gel process. The effects of carbon source and carbon content on the properties of LVP are systematically investigated. The results show that LVP-10 (containing 10 wt% MOF-derived carbon) exhibits the best lithium storage performance. The initial discharge capacity of LVP-10 reaches 180.1 mAh g<sup>− 1</sup> at 0.1&#xa0;C and remains the highest among all samples even at 5&#xa0;C. The capacity retention after 100 cycles at 0.1&#xa0;C is also the highest among the studied electrodes. Furthermore, electrochemical impedance spectroscopy reveals that LVP-10 exhibits the lowest charge transfer resistance (91.93 Ω) and the highest lithium-ion diffusion coefficient (6.22 × 10<sup>− 17</sup> cm<sup>2</sup>·s<sup>− 1</sup>). It is concluded that the outstanding electrochemical performance of LVP-10 arises from the synergistic effects of its inferior LVP crystallinity, along with the graphitic carbon and graphitic-N incorporated within the porous MOF-derived carbon framework. The inferior crystallinity of LVP enhances the pseudocapacitive contribution to lithium storage, while the graphitic carbon and graphitic-N significantly improve the electronic conductivity of the composite. This study provides valuable insights into the design and synthesis of high-performance Li<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> cathode materials.</p>

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Effect of different carbon sources and carbon contents on the electrochemical properties of Li3V2(PO4)3

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Zhihong He,
  • Huanqiao Song,
  • Xiayu Wu,
  • Qihang Zou,
  • Mingsheng Luo

摘要

This paper presents the successful synthesis of Li3V2(PO4)3 (LVP)/C samples with different carbon sources and carbon contents by introducing metal-organic framework (MOF)-derived carbon, glucose-derived carbon, and sucrose-derived carbon during the sol-gel process. The effects of carbon source and carbon content on the properties of LVP are systematically investigated. The results show that LVP-10 (containing 10 wt% MOF-derived carbon) exhibits the best lithium storage performance. The initial discharge capacity of LVP-10 reaches 180.1 mAh g− 1 at 0.1 C and remains the highest among all samples even at 5 C. The capacity retention after 100 cycles at 0.1 C is also the highest among the studied electrodes. Furthermore, electrochemical impedance spectroscopy reveals that LVP-10 exhibits the lowest charge transfer resistance (91.93 Ω) and the highest lithium-ion diffusion coefficient (6.22 × 10− 17 cm2·s− 1). It is concluded that the outstanding electrochemical performance of LVP-10 arises from the synergistic effects of its inferior LVP crystallinity, along with the graphitic carbon and graphitic-N incorporated within the porous MOF-derived carbon framework. The inferior crystallinity of LVP enhances the pseudocapacitive contribution to lithium storage, while the graphitic carbon and graphitic-N significantly improve the electronic conductivity of the composite. This study provides valuable insights into the design and synthesis of high-performance Li3V2(PO4)3 cathode materials.