LFP via Nanoscale Surface Reforming with a Tiny Minimal Amount of Conductivity-Enhancing Material

LiFePO₄ (LFP) typically requires a conductive additive to improve its low ion and electron conductivity. In this study, we achieved significant enhancements in Li⁺ and electron mobility by applying a minimal amount of conductive material through a new coating process. The coin cell demonstrated an excellent capacity of 157.57 mA h g^–1 at 0.1 C/25 °C, while the pouch cell exhibited excellent long-term cycling stability, maintaining 99.33% capacity after 150 cycles at 1 C/45 °C. Compared to pristine LFP, the rate capacities increased by 30%, reaching 130.9 mA h g^–1 at 3 C. After 100 cycles, the R_CT resistance value decreased by 10% compared to pristine. The uniform coating layer not only improved electronic conductivity but also enhanced the rate performance. DCIR testing of the pouch cell showed a 17.7% reduction in resistance values compared to that of pristine LFP with increasing cycles. This new coating method, using a very small amount of conductive material, forms a uniform coating layer that optimizes electrochemical performance while maintaining the economic benefits of the LFP cathode material.