Electrochemical Properties of Zn–Al–La Layered Double Hydroxides in Zn–Ni Secondary Batteries

[Image: see text] Zn–Al–La layered double hydroxides (LDHs) were prepared by the hydrothermal method and used as a new anodic material for Zn–Ni secondary batteries. The morphology and microstructure of Zn–Al–La-LDHs were analyzed by Fourier transform infrared, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The electrochemical properties of Zn–Al–La-LDHs as negative electrode materials for Zn–Ni batteries were studied by the cyclic voltammetry, Tafel polarization curve, and constant current charge–discharge test. XRD and SEM analysis showed that the crystallinity of the prepared Zn–Al–La-LDHs was good and the dispersion was uniform and showed regular hexagonal structures. The results of electrical properties show that Zn–Al–La-LDHs have good cycle reversibility and corrosion resistance when applied to Zn–Ni secondary batteries. The analysis of galvanostatic charge–discharge measurement results shows that the Zn–Al–La-LDH electrode has excellent cycle stability and charge–discharge characteristics. After 150 cycles, the cycle retention rate can reach 91.63%.