In-situ growth of low-dimensional agglomerated CeO2@Co-Al layered double hydroxide composite on nickel foam for energy storage application

A unique low-dimensional aggregates, CeO 2 @Co-Al layered double hydroxide composite on nickel foam (CeO 2 @Co-Al LDH-NF), was successfully synthesized by growing CeO 2 (one-dimensional nanorod-like particles) and Co Al LDH (two-dimensional petal-like materials) active materials on a foam nickel substrate using a hydrothermal method. The synthesized non-adhesive electrode could be directly used as battery-like materials for energy storage. FESEM results indicated that the CeO 2 nanorod-like structure was uniformly arranged within a petal-like LDH structure, with no observable agglomeration. The successful synthesis of the composite material was confirmed using XRD, SEM and FIB-SEM. The electrochemical performance of CeO 2 @Co-Al LDH-NF was further evaluated through CV, GCD, and EIS measurements. The results demonstrated that the electrode maintains a columbic efficiency of 99.18 % after 3000 charge-discharge cycles at a high current density of 20 mA·cm −2 . In comparison to traditional electrode materials, which typically consisted of a mixture of active materials, binders, and conductive additives, resulting in low ion and electron diffusion efficiencies, the binder-free CeO 2 @Co-Al LDH-NF electrode material performed excellent cycling stability and thus shows significant potential for practical applications. • In-situ growth of low-dimensional aggregated LDH composite on nickel foam • High columbic efficiency (99.18 %) after 3000 charge-discharge cycles • Low charge transfer resistance of the materials facilitates electron transport