Polypyrrole-modified LFP/coal-derived rGO cathodes for enhanced charge transport

LC derived GO is then reduced and functionalized with the conducting polymer polypyrrole (PPy) to produce a conductive reduced graphene oxide (rGO)/PPy network that improves interfacial charge transport. The combined effect of the addition of PPy in LFP/rGO results in not only an increase in electronic conductivity but also in the facilitation of movement of ions during lithiation processes, thereby improving the electrochemical properties. The LFP/rGO/PPy shows a better performance with a discharge capacity of 158 mAh/g with good cycling stability, retaining 96% of its capacity after 400 charge/discharge cycles at 3. 4 V.将LC衍生氧化石墨烯（LC derived GO）经还原与功能化处理，并采用导电聚合物聚吡吡咯（Polypyrrole, PPy）进行改性，制备得到可改善界面电荷传输的导电型还原氧化石墨烯（reduced Graphene Oxide, rGO）/聚吡吡吡咯复合网络。在磷酸铁锂（Lithium Iron Phosphate, LFP）/还原氧化石墨烯（rGO）复合体系中引入该复合网络后，其协同效应不仅可提升电子导电率，还可促进脱嵌锂过程中的离子迁移，进而优化材料的电化学性能。所制备的LFP/rGO/PPy复合材料展现出优异的电化学性能：放电比容量可达158 mAh/g，循环稳定性良好，在3.4 V电压下历经400次充放电循环后仍可保留96%的初始容量。