Epoxy composite coatings filled with fillers have been used extensively as anticorrosion materials. In this study, an alternating multilayer structure is designed to obtain multifunctional epoxy resin composite coating based on stepwise coating method via adding graphene and α‐alumina. Their mechanical properties, thermal conductivity, dielectric and anticorrosion properties are characterized. The toughness and the thermal conductivity clearly increase, while the dielectric properties decrease approximately to zero when the filler mass fraction increases from 0.00% to 0.15%. The whole corrosion process is controlled by electrochemical reaction, and the fillers effectively block the corrosive medium, thus improving the anticorrosion performance of the composite coating.

Chitosan (CS) rich in ∼ 7 wt% nitrogen is the renewable nontoxic biomass material derived from seafood waste. Chitosan is a suitable precursor to obtain N-doped materials due to the nitrogen in acetamide and amine of chitosan. In this work, the new type of N-doped MXene nanomaterials is prepared from non-toxic biological chitosan and MXene using a simple, environment-friendly method as a potential electrode for supercapacitor. The specific capacitance of 1MXene-1N reaches up to 286.28 F/g (154.59 C/g). After 10,000 charge and discharge cycles, the efficiency is always above 98%. The N-doped MXene turned out to be high electrochemistry and excellent stability due to the lone pair of electrons of the N atom and increased interlayer distance.

Polydimethylsiloxane (PDMS) composite coatings filled with nanopaticles have been used extensiv ely as anticorrision materials. The alternating multilayer polydimethylsiloxane resin nanocomposite co ating was first fabricated based on stepwise coating method via adding graphene and α-alumina. Th eir mechanical and anticorrosion properties were discussed. The binary fillers greatly improve the ad hesion up to level 1 on the same time the coating remains extreme flexibility. When the graphene is 0.3wt%, the alternating multilayer coating exhibits the best corrosion resistance with the 4.82V of corrosion potential (Ecorr), which increases by near 40 times compared with pure PDMS coating. Meanwhile, the impedance value of composite coating reaches 10 9 Ω•cm 2. The corrosion current den sity (Icorr) of the coating is smaller than that of bare tinplate. The long-term soaking results prove t hat the alternating multilayer composite coating still possess the outstanding corrosion resistance for tinplate after 30 days of immersion.

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The graphene/Fe3O4 (GN/Fe3O4) nanocomposites used as electrode of supercapacitors were prepared by chemical reduction-high temperature treatment. The Fe3O4 with uniform size regularly decorate on the surface of graphene. According to the charge and discharge test, the GN/Fe3O4-0.05 electrode has the good mass specific capacitance (265.6 F/g) at a current density of 0.5 A/g. When the power density is 20.27 kW/kg, the energy density reaches 11.26 Wh/kg. Finally, the button supercapacitors were assembled used the prepared nanocomposites as electrodes. The nanocomposites exhibit stable capacitance efficiency after 100 cycles of charging and discharging. The capacitance efficiency still exceeds 80% after 500 cycles of charging and discharge, indicating that the nanocomposite has excellent cycle stability.

Back Cover: In article number 1900374 by Jiaoxia Zhang, Jincheng Fan, Tao Ding, Zhanhu Guo, and co‐workers, an alternating multilayer structure is designed to obtain multifunctional epoxy resin composite coatings based on a stepwise coating method via adding graphene and α‐alumina. The toughness and the thermal conductivity are clearly increased, while the dielectric properties are decreased when the filler content is increased. The fillers effectively improve the anticorrosion performance of the composite coating.

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