The conductive additives are often used to improve the conductivity of the electrode in lithium iron phosphate battery. In this work, a series of carbon-based conductive slurries of acetylene black, carbon nanotubes and graphene were obtained by the ball milling method and applied to the cathodes of lithium iron phosphate batteries. The conductivity of the ternary conductive slurry reaches 11.98[Formula: see text]S[Formula: see text]cm[Formula: see text] and the result of Zeta potential indicates that the ternary conductive slurry has the best deposit stability. The average discharge capacity of lithium batteries with ternary conductive additive is 111.3[Formula: see text]mAh[Formula: see text]g[Formula: see text] at the current density of 10C, which is 1.9 times higher than that of acetylene black conductive additive batteries widely used nowadays. The specific capacity of the battery is 129.2[Formula: see text]mAh[Formula: see text]g[Formula: see text] after 200 cycles at the current density of 5C, and the capacity retention rate is 99.7%. The ternary conductive materials can form a continuous “point-line-surface” conductive network, increase the contact sites between lithium iron phosphate particles and conductive materials and provide a more efficient transmission path.

中文翻译：

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磷酸铁锂电池用多元导电纳米碳添加剂的制备及电化学性能

导电添加剂常用于提高磷酸铁锂电池中电极的导电性。本工作通过球磨法获得了一系列乙炔黑、碳纳米管和石墨烯的碳基导电浆料，并将其应用于磷酸铁锂电池的正极。三元导电浆料的电导率达到11.98[公式：见文]S[公式：见文]cm[公式：见文]，Zeta电位结果表明三元导电浆料的沉积稳定性最好。三元导电添加剂锂电池在10C的电流密度下，平均放电容量为111.3[公式：见文]mAh[公式：见文]g[公式：见文]，即1。比现在广泛使用的乙炔黑导电添加剂电池高9倍。电池在5C电流密度下循环200次后比容量为129.2[公式：见文]mAh[公式：见文]g[公式：见文]，容量保持率为99.7%。三元导电材料可以形成连续的“点-线-面”导电网络，增加磷酸铁锂颗粒与导电材料的接触点，提供更高效的传输路径。