垂直多孔碳包覆的 FeF₃正极的构筑及储锂性能研究

The development of low-cost, high-performance cathodes is one of the major research goals for next-generation rechargeable lithium and lithium-ion batteries. As a promising alternative to traditional intercalated electrode materials, metal fluorides offer much higher theoretical capacity and energy density than conventional cathodes. Herein, a self-assembled iron fluoride/carbon/porous graphene oxide (FeF₃/C/HRGO) cathode material covered by vertical porous carbon structure was designed and fabricated. This vertical porous carbon structure presents a double-layer carbon-clad frame with primary and secondary carbon-clad layers. Among them, the primary carbon shell generated by glucose wraps around FeF₃ nanoparticles which effectively inhibits the growth of particle volume during fluorination process. Meanwhile, the porous conductive network in the secondary carbon-clad layer significantly shortens the transport path of Li⁺and increase the electronic conductivity. As a result, the FeF₃/C/HRGO electrode delivered an excellent reversible capacity of 406 mAh·g^-1 after 200 cycles at 0.1