| Summary: | The effect of different nitrogen-doped carbon additives (carbon coating from polyaniline, N-doped carbon nanotubes, and N-doped carbon nanoparticles) on electrochemical performance of nanocomposites based on the olivine-type LiFePO<sub>4</sub> was investigated. Prepared materials were characterized by XRD, SEM, TGA-MS, CHNS-analysis, IR-, Raman, and impedance spectroscopies. Polyaniline deposition on the LiFePO<sub>4</sub> precursor with following annealing lead to the formation of a LiFePO<sub>4</sub>/C nanocomposite with a carbon coating doped with nitrogen. Due to nitrogen atoms presence in carbon coating, the LiFePO<sub>4</sub>/N-doped carbon nanocomposites showed enhanced conductivity and C-rate capability. The discharge capacities of the synthesized materials in LIBs were close to the theoretical value at 0.1 C and retained high values with increasing current density. At high C-rates, the best results were obtained for a more dispersed LiFePO<sub>4</sub>/C composite with carbon coating prepared from polyaniline previously in situ deposited on LiFePO<sub>4</sub> precursor particles. Its discharge capacity reached 96, 84, 73, and 47 mAh g<sup>−1</sup> at 5, 10, 20, and 60 C-rates, respectively.
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