FeOOH, as a significant transition metal oxide, demonstrates considerable potential for application in lithium-ion batteries due to its distinctive electrochemical activity. By precisely controlling its morphology and microstructure, its electrochemical performance can be further enhanced. This study successfully synthesized various morphology-controlled FeOOH materials through the combined regulation of hydrothermal and precipitation techniques. The crystal structure, microstructure, and thermal stability of the samples were systematically analyzed using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The electrochemical performance of FeOOH with different morphologies as anode materials for lithium-ion batteries was examined. The findings revealed that needle -shaped FeOOH exhibits the most favorable electrochemical behavior, with an initial discharge specific capacity of 794.6 mAh/g at a rate of 0.5 C and a reversible capacity of 296.2 mAh/g (capacity retention rate of 37%) after 200 cycles. The electrode sheet impedance is only 142.2 ohm, and the battery performance is further enhanced by incorporating graphene composite regulation. The capacity retention rate can reach 72% (557.0 mAh/g) after 200 cycles. This research provides experimental evidence for the morphology control of FeOOH -based electrode materials, establishing a foundation for their practical application in high-energy density lithium-ion batteries.
Yang et al. (Wed,) studied this question.