Rechargeable lithium batteries have been widely used for consumer electronics and are desirable for the development of hybrid electric vehicles and electric vehicles, due to their high energy density and good environm...
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Rechargeable lithium batteries have been widely used for consumer electronics and are desirable for the development of hybrid electric vehicles and electric vehicles, due to their high energy density and good environment *** enhanced electrochemical performance of electrodes depends on not only the material intrinsic characteristics, but also the designed ***-dimensional (1D) nanostructures can offer large surface area and efficient electron transport pathway to achieving high *** a functional nanostructure, nanoscroll with open ends/edges could provide easy radial expansion by interlayer sliding to buffer the swelling during lithiation/delithiation.
Lithium-ion batteries (LIBs) are receiving considerable attention as storage devices in the renewable and sustainable energy ***, facile fabrication of long-life and high-rate cathode materials for LIBs is required to...
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Lithium-ion batteries (LIBs) are receiving considerable attention as storage devices in the renewable and sustainable energy ***, facile fabrication of long-life and high-rate cathode materials for LIBs is required to facilitate practical application.
Noble-metal nanostructures have attracted considerable research interest in both fundamental studies and various practical applications because of their unique catalytic, electronic, photonic, and sensing properties. ...
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Noble-metal nanostructures have attracted considerable research interest in both fundamental studies and various practical applications because of their unique catalytic, electronic, photonic, and sensing properties. However, because of their high cost and limited reserves, it is urgent to reduce their required usage in such applications. Controlling the morphology of noble-metal nanostructures can provide a great opportunity to improve their catalytic properties and increase their activity based on their mass. Here, we report a convenient and effective wet-chemical strategy that produces uniform porous PtPd bimetallic nanostructures with perpendicular pore channels and ultrathin branches. It was demonstrated that the porous PtPd bimetallic nanostructures exhibited high activity for oxygen reduction reaction (ORR), where they outperformed the Pt-black catalyst and the state-of-the-art Pt/C catalyst on the basis of equivalent Pt mass. This high performance can be attributed to the high surface area and perpendicular dendritic structures in the porous PtPd bimetallic nanostructures that provide highly accessible surface active site, as well as maintain the structural integrity of the catalysts. Our approach provides a promising route to the development of next-generation catalysts with substantial reduction in noble-metal loading while retaining high ORR activity.
One-dimensional nanomaterials have attracted significant attention for a wide range of energy-related applications due to such unique advantages as short Li-ion insertion/extraction distance, facile strain relaxation ...
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One-dimensional nanomaterials have attracted significant attention for a wide range of energy-related applications due to such unique advantages as short Li-ion insertion/extraction distance, facile strain relaxation upon electrochemical cycling, enhanced electron transport, and very large surface to volume ratio.
Mechanical stability is of vital significance in commercial application of thermoelectric *** essential mechanical behaviours of a nanoporous skutterudite thermoelectric material have been studied by the molecular dyn...
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Mechanical stability is of vital significance in commercial application of thermoelectric *** essential mechanical behaviours of a nanoporous skutterudite thermoelectric material have been studied by the molecular dynamics method. The research results reveal that the nanoporous skutterudite is a typical non-linear elastic brittle material, and that the existence of nanopores can remarkably reduce the mechanical properties of the skutterudite. Further research results reveal that the elastic modulus of the nanoporous skutterudite decreases with the growing porosity, and the relationship between the elastic modulus and the porosity can be summarised by an inversely proportional scaling law. The ultimate stress reduces gradually with the decreasing inner nanopore spacing. The fracture strain first decreases and then levels off, which can be attributed to the interplay between the increased porosity and the reduced inner nanopore spacing.
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