Effect of different carbon and nitrogen co-doping on electrochemical performance of LiFePO4/CN

Abstract

In this paper, carbon–nitrogen co-doping lithium iron phosphate composite materials were prepared by two-step hydrothermal method. Special organic small molecules were selected to induce and control the morphology of cathode materials to obtain excellent performance. To modify the lithium iron phosphate material, polyaniline (PANI), dopamine (PDA), and melamine (M) were used as carbon and nitrogen co-doped composite materials. At 0.2C, the three material groups' first discharge specific capacities were 149.1 mAhg−1, 158.4 mAhg−1, and 140 mAhg−1, respectively.