NiFe-LDH/Co-CNTs nano composite material and preparation method and application thereof

• Main Authors: XU ZHUYING, SHEN JUNLING, HU YONG
• Format: Patent
• Language: Chinese; English
• Published: 13.07.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the technical field of preparation of air electrode materials of rechargeable zinc-air batteries, in particular to a NiFe-LDH/Co-CNTs nanocomposite and a preparation method and application thereof. The method comprises the following steps: taking cobalt salt and 2-methylimidazole as reaction raw materials, taking carbon cloth as a substrate, growing to obtain a Co-ZIF nanosheet, and carbonizing to obtain a Co-CNTs/CC nano material; and then carrying out a hydrothermal reaction in a nickel salt and iron salt mixed solution, and obtaining the NiFe-LDH/Co-CNTs nano composite material with the surfaces of the Co-CNTs wrapped with NiFe-LDH. The material has high bifunctional activity, high power density and high stability; when the material is applied to a rechargeable zinc-air battery, the power density is 194mWcm <-2 >, the material has relatively high energy conversion efficiency and cycling stability, and when the material is used as an integrated air electrode for assembling a flexibl