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Electrochemical performance of nano-sized LiFePO4-embedded 3D-cubic ordered mesoporous carbon and nitrogenous carbon composites

机译:纳米LiFePO4嵌入式3D立方有序介孔碳和氮碳复合材料的电化学性能

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摘要

Herein, we report a single-step synthesis, characterization, and electrochemical performance of nano-sized LiFePO4(LFP)-embedded 3D-cubic mesoporous carbon (CSI-809) and nitrogenous carbon (MNC-859) composites. Furthermore, in order to investigate the effects of both CSI-809 and MNC-859 on the electrochemical characteristics of LFP, a systematic study was performed on the morphology and microstructure of the composites,viz., LFP/CSI-809 and LFP/MNC-859, using XRD, FE-SEM, FT-Raman, and BET surface area analyses. Among these composites, LFP/MNC-859 exhibited better electrochemical performance with higher specific capacity and rate capability as compared to those of LFP/CSI-809. In addition, even after 100 cycles, LFP/MNC-859 retained 97% of its initial discharge capacity at 1C rate. The enhanced electrochemical performance of the nano-sized LFP-embedded MNC-859 can be attributed to the conductive nitrogenous carbon and mesoporosity, which facilitate electrolyte diffusion, and improved conductivity of the advanced LFP-nitrogenous porous carbon matrix.
机译:在此,我们报告了纳米尺寸LiFePO4(LFP)-embedded 3D - 立方中孔碳(CSI-809)和氮碳(MNC-859)复合材料的单步合成,表征和电化学性能。此外,为了研究CSI-809和MNC-859对LFP电化学特性的影响,对复合材料,VIZ,LFP / CSI-809和LFP / MNC的形态和微观结构进行系统研究-859,使用XRD,FE-SEM,FT-RAMAN和BET表面积分析。在这些复合材料,相比于那些LFP / CSI-809的LFP / MNC-859显示出具有更高的比容量和倍率性能更好的电化学性能。此外,即使在100次循环之后,LFP / MNC-859也以1C速率保留97%的初始放电容量。纳米大小的LFP嵌入式MNC-859的增强的电化学性能可归因于导电氮碳和中渗透度,其促进电解质扩散,以及提高先进的LFP-氮多孔碳基质的导电性。

著录项

  • 来源
    《RSC Advances》 |2020年第51期|共9页
  • 作者单位

    Indian Inst Technol Madras Natl Ctr Catalysis Res Chennai 600036 Tamil Nadu India;

    Indian Inst Technol Madras Natl Ctr Catalysis Res Chennai 600036 Tamil Nadu India;

    Indian Inst Technol Madras Natl Ctr Catalysis Res Chennai 600036 Tamil Nadu India;

    Indian Inst Technol Madras Natl Ctr Catalysis Res Chennai 600036 Tamil Nadu India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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