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• Ca-Zr co-doped Na 0.94 Ca 0.03 Cr 0.97 Zr 0.03 O 2 sample was prepared by a facile solid-state reaction. • Ca-Zr co-doping was innovatively adopted to improve the structural reversibility at high cutoff voltage. • Na 0.94 Ca 0.03 Cr 0.97 Zr 0.03 O 2 exhibits excellent electrochemical performance in the voltage range of 1.5–3.8 V. O3-type NaCrO 2 has been researched as a promising cathode material for sodium-ion batteries (SIBs), however, it suffers from serious irreversible phase transitions when charged to 3.8 V, thereby resulting in a severe decline of reversible capacity. To improve the structural stability, small amounts of Ca2+ and Zr4+ ions are introduced into the O3-type NaCrO 2 via a facile solid-state reaction in this work. In the voltage range of 1.5–3.8 V, O3-type Na 0.94 Ca 0.03 Cr 0.97 Zr 0.03 O 2 delivers ∼ 120 mAh g−1 with a capacity retention of 64.6% after 500 cycles and a reversible capacity of 76 mAh g−1 at 20C, much better than those of O3-type NaCrO 2. The improved performance of O3-type Na 0.94 Ca 0.03 Cr 0.97 Zr 0.03 O 2 is attributed to the better structural reversibility and electrochemical reaction kinetics at the high charge cutoff voltage enabled by Ca and Zr co-doping. Our findings benefit the development of cathode materials with high energy density and high cycling stability for SIBs. [ABSTRACT FROM AUTHOR]

Abstract: The effect of Fe content on atomic site occupation in L12–Ni3(Al1− x Fe x ) structure at 1073 K was studied by using microscopic phase-field model. The results show that with increasing Fe, Fe atoms prefer to occupy the Al sites (β sites), and the site occupation probability (SOP) gradually increases, while the SOP of Al atoms on β sites decreases accordingly. Meanwhile, a small amount of Ni atoms also occupy β sites which is the so-called anti-site behavior; reversely, such behavior happens as a trace amount of Al and Fe atoms occupies α sites. Unlike Ni atoms, the anti-site behavior of Al and Fe atoms is strengthened with the increase of Fe content. Further, the precipitation mechanism, the size and the ordering degree of L12 structure also present obvious changes with the addition of Fe. [Copyright &y& Elsevier]

• Polypropylene was surface functionalized with porous coating with polymerization induced phase separation. • Porous polyacrylamide coatings were loaded successfully on PP with mussel-inspired dopamine. • Polyacrylamide coating has better toughness and elasticity after dopamine modification. In this work, polyacrylamide/polydopamine (PAM/PDA) composite coating with porous structure is proposed for the polypropylene (PP) surface modification. Polymerization induced phase separation (PIPS) method cooperated with mussel-inspired dopamine (DA) is all applied in this process. With the assistance of the DA, PAM coatings can firmly adhere to the PP surfaces. After adding dopamine, the Young's modulus of the PAM/PDA coating is decreased by two-thirds and the elastic modulus increased more than doubled. [ABSTRACT FROM AUTHOR]

[Display omitted] • Chemically and electrostatically double-cross-linked composite adhesive. • Heating-induced gradual increase in adhesion strength over time. • Higher and sustainable adhesive ability to various substrates. A hydrophobic composite underwater adhesive was constructed through simultaneously mixing liquid polydimethylsiloxane (PDMS), micro particle polytetrafluoroethylene (PTFE) and tetraethyl silicate (TEOS) together according to the different mass ratio of component and subsequently heating crosslinking reaction. The electrostatic interaction between hydrogen atoms charged partially positively in PDMS and fluorine atoms charged partially negatively in PTFE contribute the adhesive captivity of PDMS/PTFE while the crosslinking reaction of TEOS with PDMS will enhance further effectively mechanical properties of adhesives. The adhesive ability and sustainable time to various substrate were evaluated systematically. [ABSTRACT FROM AUTHOR]

Cathodic polarization antifouling has attracted attention because of environment-friendly property. We have developed a conductive PPy/resin coating with good electrochemical antifouling effects. However, its conductivity should be further improved to save the electric energy. In this work, a conductive Ag@PPy/resin composite was synthesized. Compared to PPy/resin coating, its conductivity was increased by 6 times, besides, its stability and 2e − oxygen reduction reaction (ORR) activity were obviously enhanced. And the antifouling effect under smaller cathodic voltage (−0.3 V) is improved, increasing the anti-fouling efficiency. [ABSTRACT FROM AUTHOR]