Nanocluster formation of a metallic platinum (Pt) coating, on manganese oxide inorganic membranes impregnated with multiwall carbon nanotubes (K-OMS-2/MWCNTs), applied by reactive spray deposition technology (RSDT) is...Nanocluster formation of a metallic platinum (Pt) coating, on manganese oxide inorganic membranes impregnated with multiwall carbon nanotubes (K-OMS-2/MWCNTs), applied by reactive spray deposition technology (RSDT) is discussed. RSDT applies thin films of Pt nanoclusters on the substrate;the thickness of the film can be easily controlled. The K-OMS-2/MWCNTs fibers were enclosed by the thin film of Pt. X-ray diffraction (XRD), scanning electron microscopy/X-ray energy dispersive spectroscopy (SEM/XEDS), focus ion beam/scanning electron microscopy (FIB/SEM), transmission electron microscopy (TEM), and X-ray 3D micro-tomography (MicroXCT) which have been used to characterize the resultant Pt/K-OMS-2/MWCNTs membrane. The non-destructive characterization technique (MicroXCT) resolves the Pt layer on the upper layer of the composite membrane and also shows that the membrane is composed of sheets superimposed into stacks. The nanostructured coating on the composite membrane material has been evaluated for carbon monoxide (CO) oxidation. The functionalized Pt/K-OMS-2/MWCNTs membranes show excellent conversion (100%) of CO to CO2 at a lower temperature 200℃ compared to the uncoated K-OMS-2/MWCNTs. Moreover, the Pt/K-OMS-2/MWCNTs membranes show outstanding stability, of more than 4 days, for CO oxidation at 200℃.展开更多
Lithium-ion batteries(LIBs)are the most important electrochemical energy storage devices due to their high energy den-sity,long cycle life,and low cost.During the past decades,many review papers outlining the advantag...Lithium-ion batteries(LIBs)are the most important electrochemical energy storage devices due to their high energy den-sity,long cycle life,and low cost.During the past decades,many review papers outlining the advantages of state-of-the-art LIBs have been published,and extensive efforts have been devoted to improving their specific energy density and cycle life performance.These papers are primarily focused on the design and development of various advanced cathode and anode electrode materials,with less attention given to the other important components of the battery.The“nonelectroconductive”components are of equal importance to electrode active materials and can significantly affect the performance of LIBs.They could directly impact the capacity,safety,charging time,and cycle life of batteries and thus affect their commercial application.This review summarizes the recent progress in the development of nonaqueous electrolytes,binders,and separa-tors for LIBs and discusses their impact on the battery performance.In addition,the challenges and perspectives for future development of LIBs are discussed,and new avenues for state-of-the-art LIBs to reach their full potential for a wide range of practical applications are outlined.展开更多
文摘Nanocluster formation of a metallic platinum (Pt) coating, on manganese oxide inorganic membranes impregnated with multiwall carbon nanotubes (K-OMS-2/MWCNTs), applied by reactive spray deposition technology (RSDT) is discussed. RSDT applies thin films of Pt nanoclusters on the substrate;the thickness of the film can be easily controlled. The K-OMS-2/MWCNTs fibers were enclosed by the thin film of Pt. X-ray diffraction (XRD), scanning electron microscopy/X-ray energy dispersive spectroscopy (SEM/XEDS), focus ion beam/scanning electron microscopy (FIB/SEM), transmission electron microscopy (TEM), and X-ray 3D micro-tomography (MicroXCT) which have been used to characterize the resultant Pt/K-OMS-2/MWCNTs membrane. The non-destructive characterization technique (MicroXCT) resolves the Pt layer on the upper layer of the composite membrane and also shows that the membrane is composed of sheets superimposed into stacks. The nanostructured coating on the composite membrane material has been evaluated for carbon monoxide (CO) oxidation. The functionalized Pt/K-OMS-2/MWCNTs membranes show excellent conversion (100%) of CO to CO2 at a lower temperature 200℃ compared to the uncoated K-OMS-2/MWCNTs. Moreover, the Pt/K-OMS-2/MWCNTs membranes show outstanding stability, of more than 4 days, for CO oxidation at 200℃.
基金Mexichem Fluor,Inc.(4161950),General Manager Growth,Fluor Business Groups,Boston,MA.The authors would also like to express their gratitude to Dr.Haoran Yu and Mr.Piyush Jibhakate for the useful discussions related to the content of this review paper.
文摘Lithium-ion batteries(LIBs)are the most important electrochemical energy storage devices due to their high energy den-sity,long cycle life,and low cost.During the past decades,many review papers outlining the advantages of state-of-the-art LIBs have been published,and extensive efforts have been devoted to improving their specific energy density and cycle life performance.These papers are primarily focused on the design and development of various advanced cathode and anode electrode materials,with less attention given to the other important components of the battery.The“nonelectroconductive”components are of equal importance to electrode active materials and can significantly affect the performance of LIBs.They could directly impact the capacity,safety,charging time,and cycle life of batteries and thus affect their commercial application.This review summarizes the recent progress in the development of nonaqueous electrolytes,binders,and separa-tors for LIBs and discusses their impact on the battery performance.In addition,the challenges and perspectives for future development of LIBs are discussed,and new avenues for state-of-the-art LIBs to reach their full potential for a wide range of practical applications are outlined.
