The various stages and progress in the development of interconnect materials for solid oxide fuel cells (SOFCs )over the last two decades are reviewed. The criteria for the application of materials as interconnects ar...The various stages and progress in the development of interconnect materials for solid oxide fuel cells (SOFCs )over the last two decades are reviewed. The criteria for the application of materials as interconnects are highlighted. Interconnects based on lanthanum chromite ceramics demonstrate many inherent drawbacks and therefore are only useful for SOFCs operating around 1000℃. The advance in the research of anode-supported flat SOFCs facilitates the replacement of ceramic interconnects with metallic ones due to their significantly lowered working temperature. Besides, interconnects made of metals or alloys offer many advantages as compared to their ceramic counterpart. The oxidation response and thermal expansion behaviors of various prospective metallic interconnects are examined and evaluated. The minimization of contact resistance to achieve desired and reliable stack performance during their projected lifetime still remains a highly challenging issue with metallic interconnects. Inexpensive coating materials and techniques may play a key role in promoting the commercialization of SOFC stack whose interconnects are constructed of some current commercially available alloys. Alternatively, development of new metallic materials that are capable of forming stable oxide scales with sluggish growth rate and sufficient electrical conductivity is called for.展开更多
Highly stable monolayers of 2,9,16,23-tetracarboxyl phthalocyanine on 3-aminopropyl -triethoxysilane (ATS) modified silicon and quartz substrates were prepared by reaction of carboxyl and amine. The monolayers were ch...Highly stable monolayers of 2,9,16,23-tetracarboxyl phthalocyanine on 3-aminopropyl -triethoxysilane (ATS) modified silicon and quartz substrates were prepared by reaction of carboxyl and amine. The monolayers were characterized by UV-Vis spectra and AFM measurements. The results indicated that the ultra-thin films on silicon or quartz were smooth, and the ordered structures were observed in these films.展开更多
The effect of fluorination on the aggregate structure of a novel fluorinated perylene diimide, N, N'-diperfluorophenyl-3, 4, 9, 10-perylenetetracarboxylic diimide 1, was investigated by UV-Vis absorptions and the ...The effect of fluorination on the aggregate structure of a novel fluorinated perylene diimide, N, N'-diperfluorophenyl-3, 4, 9, 10-perylenetetracarboxylic diimide 1, was investigated by UV-Vis absorptions and the conformation simulations from AM1 semi-empirical quantum mechanics modeling. The results showed that in the solid film 1 molecules stacked with the perfluorinated phenyl groups straightly over or below the perylene cores of the adjacent 1 molecules.展开更多
A novel triphenylamine derivative of 4, 4'-bis-[2-[4-[N, N-bis-(4-methoxyphenyl-amino)]phenyl-1-yl]-vinyl-1-yl]-1, 1'-biphenyl (DMPAVBI) was synthesized. The chemical structure wasconfirmed by IR, H NMR spectr...A novel triphenylamine derivative of 4, 4'-bis-[2-[4-[N, N-bis-(4-methoxyphenyl-amino)]phenyl-1-yl]-vinyl-1-yl]-1, 1'-biphenyl (DMPAVBI) was synthesized. The chemical structure wasconfirmed by IR, H NMR spectroscopy and elemental analysis. Its properties were studied by 1UV-Vis spectroscopy, photoluminescence spectroscopy and cyclic voltammetry methods.展开更多
文摘The various stages and progress in the development of interconnect materials for solid oxide fuel cells (SOFCs )over the last two decades are reviewed. The criteria for the application of materials as interconnects are highlighted. Interconnects based on lanthanum chromite ceramics demonstrate many inherent drawbacks and therefore are only useful for SOFCs operating around 1000℃. The advance in the research of anode-supported flat SOFCs facilitates the replacement of ceramic interconnects with metallic ones due to their significantly lowered working temperature. Besides, interconnects made of metals or alloys offer many advantages as compared to their ceramic counterpart. The oxidation response and thermal expansion behaviors of various prospective metallic interconnects are examined and evaluated. The minimization of contact resistance to achieve desired and reliable stack performance during their projected lifetime still remains a highly challenging issue with metallic interconnects. Inexpensive coating materials and techniques may play a key role in promoting the commercialization of SOFC stack whose interconnects are constructed of some current commercially available alloys. Alternatively, development of new metallic materials that are capable of forming stable oxide scales with sluggish growth rate and sufficient electrical conductivity is called for.
文摘Highly stable monolayers of 2,9,16,23-tetracarboxyl phthalocyanine on 3-aminopropyl -triethoxysilane (ATS) modified silicon and quartz substrates were prepared by reaction of carboxyl and amine. The monolayers were characterized by UV-Vis spectra and AFM measurements. The results indicated that the ultra-thin films on silicon or quartz were smooth, and the ordered structures were observed in these films.
文摘The effect of fluorination on the aggregate structure of a novel fluorinated perylene diimide, N, N'-diperfluorophenyl-3, 4, 9, 10-perylenetetracarboxylic diimide 1, was investigated by UV-Vis absorptions and the conformation simulations from AM1 semi-empirical quantum mechanics modeling. The results showed that in the solid film 1 molecules stacked with the perfluorinated phenyl groups straightly over or below the perylene cores of the adjacent 1 molecules.
基金This work was supported by the National Natural Science Foundation of China No.50225312by Zhejiang Natural Science Foundation(No.ZC0101)the work was also partly supported by the Research Fund for the Doctoral Program of Higher Education(20020335016).
文摘A novel triphenylamine derivative of 4, 4'-bis-[2-[4-[N, N-bis-(4-methoxyphenyl-amino)]phenyl-1-yl]-vinyl-1-yl]-1, 1'-biphenyl (DMPAVBI) was synthesized. The chemical structure wasconfirmed by IR, H NMR spectroscopy and elemental analysis. Its properties were studied by 1UV-Vis spectroscopy, photoluminescence spectroscopy and cyclic voltammetry methods.
