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磷酸铁锂正极材料改性研究进展
冯晓晗1(), 孙杰1,2(), 何健豪2, 魏义华2, 周成冈1(), 孙睿敏1()
Research progress in LiFePO4 cathode material modification
Xiaohan FENG1(), Jie SUN1,2(), Jianhao HE2, Yihua WEI2, Chenggang ZHOU1(), Ruimin SUN1()

图7. LFP/石墨复合材料的合成和结构示意图：(a) LFP/C复合材料的合成是通过将石墨与FeCl3插层，然后在石墨层内形成LFP；(b) 基于LFP/C和商业LFP正极的示意图，石墨提供的连续导电网络使LFP/石墨电极的性能更好；LFP/石墨复合材料的结构和形态：(c),(d) SEM和EDS图，(e),(f) SEM图像；(g),(h) TEM图像；(i) LFP颗粒的SAED；(j) 从LFP/C复合材料中刻蚀掉LFP颗粒后的多孔石墨颗粒的SEM和(k) TEM图像[43]

Fig. 7. Schematic illustration of synthesis and structure of LFP/graphite composite. (a) synthesis of LFP/graphite composite by intercalating graphite with FeCl3 followed by formation of LFP within the graphite layers; (b) schematics of LFP/graphite based cathode and a commercial LFP cathode, continuous conductive network provided by graphite confers better performance on LFP/graphite electrode; structure and morphology of LFP/graphite composite: (c), (d) SEM and EDS mapping, (e), (f) SEM images, and (g), (h) TEM images of LFP/graphite composite; (i) inset in panel g is SAED of a LFP particle; (j) SEM and (k) TEM images of porous graphite particle after etching away LFP particles from LFP/graphite composite[43]