Effect of particle dispersion on the properties of LiFePO4 slurry and the electrochemical properties of the battery

This paper reported a combination of powerful mechanical dispersion and chemical dispersion to solve the agglomeration of lithium iron phosphate (LiFePO4) fine powder in pulping process. The effect of the addition of dispersant fatty alcohol-polyoxyethylene ether (AEO-7) on the dispersibility of LiFePO4 slurry was compared, and the slurry prepared by traditional pulping process was also been compared. The dispersion uniformity of LiFePO4 particles and the rheological properties of the slurry were significantly improved with the addition of the dispersant AEO-7. The surface of the prepared electrode was regular, and the corresponding electrode showed a high compaction density. The LiFePO4 sample prepared with AEO-7 demonstrated excellent electrochemical performance of initial discharge capacities at 0.2, 0.5, 1, 2, and 5 C are 163.3, 160.9, 155.1, 146.2, and 126.5 mAh g−1, respectively. Furthermore, the14500 type steel shell battery prepared with different electrodes has also been studied.