Layered double hydroxides (LDHs) are attractive electrode materials for supercapacitors due to their high theoretical capacitances and adjustable compositions, but also subjected to their intrinsic poor electrical conductivity and easy structure collapse properties. To resolve these intractable issues, LDHs are usually integrated with high conductivity and specific surface areas (SSAs) matrixes. Herein, NiCoP@NiFe‐LDH nanoflakes array has been successfully grown on nickel foam by a facile phosphorization and subsequent hydrothermal process. The hierarchical porous structure, large SSA, as well as the strong interfacial reactions between NiFe‐LDH and conductive NiCoP layer has enabled NiCoP@NiFe‐LDH to deliver quantities of electroactive sites, fast ion diffusion and facile electron transfer, hence remarkably boosting the supercapacitive performance. Therefore, NiCoP@NiFe‐LDH electrode has achieved a high specific capacitance of 2216 F g−1 at 1 A g−1 and retained 1038 F g−1 at 20 A g−1, whose specific capacitance and rate capability are much higher than those of NiCoP and NiFe‐LDH electrodes. In addition, NiCoP@NiFe‐LDH is assembled with an activated carbon electrode to fabricate an asymmetric supercapacitor, which displays a high energy density of 57.4 W h kg−1 and good cycling stability with 88.2 % capacitance retention after 5000 cycles. Therefore, the binder‐free electrode composed of hierarchical NiCoP@NiFe‐LDH nanoflakes array is promising for use in energy storage.

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In order to further study the forming process and evolution mechanism of new copper / graphite composite coating based on laser microcladding technology, three groups of alloy powder materials with different proportions were set up, and the 1500W fiber laser was used to prepare micro-cladding coatings on 45# steel substrates. According to the known macroscopic morphology, four groups of cladding samples with uniform, smooth and dense surface were selected for analysis, the microstructure characteristics, element distribution and growth morphology, and the causes of microstructure defects were qualitatively and quantitatively analyzed by means of the metallographic test, SEM and EDS.On this basis, the relationship between the interfacial reaction mode affected the forming microstructure of micro-cladding coating and the flow behavior of molten pool was obtained, which can be used as a reference for the optimization and regulation of the process.