掺杂镓酸镧基固体电解质的研究进展

综述近几年掺杂镓酸镧基固体电解质的研究进展,分析了掺杂LaGaO3结构及导电机制,讨论了碱土、过渡金属及杂相对掺杂镓酸镧固体电解质的导电性的影响,描述了掺杂镓酸镧固体电解质的应用前景,指出了尚存在的问题及解决问题的途径。

中低温稀土氧化物固体电解质的研究进展

中低温固体电解质是中低温固体氧化物燃料电池的关键组件,介绍了常用的中低温固体电解质的种类,较为全面地介绍了掺杂氧化铈固体电解质,对该电解质的优缺点和改进方式进行了较为全面的综述.

高密度固态储氢材料技术研究进展

针对氢介质的储存问题,分析了目前国内外氢储存技术的研究现状,综述了最近几年发展较为迅速的合金、配位氰化物和碳质储氢材料的研究进展。相对于高压气态储氢和低温液化储氢,固态氢储存安全性好和能量密度高,被认为是最有发展前景的一种氢储存技术。重点阐述了B-N基高密度固态储氢材料氨硼烷,其具有高的质量储氢密度(19. 6%)和体积储氢密度(185 g/L H2),是目前高容量固态储氢材料的研究热点和重点,且元素替代、固体掺杂、纳米填充等改性方式能够改进氨硼烷放氢性能。

Ni doped La_(0.6)Sr_(0.4)FeO_(3-δ) symmetrical electrode for solid oxide fuel cells

The conventional Ni cermet anode suffers from severe carbon deposition and sulfur poisoning when fossil fuels are used. Alternative anode materials are desired for high performance hydrocarbon fuel solid oxide fuel cells （SOFCs）. We report the rational design of a very active Ni doped La0.6Sr0.4FeO3‐δ（LSFN） electrode for hydrocarbon fuel SOFCs. Homogeneously dispersed Ni‐Fe alloy nanoparticles were in situ extruded onto the surface of the LSFN particles during the operation of the cell. Sym‐metric SOFC single cells were prepared by impregnating a LSFN precursor solution onto a YSZ （yt‐tria stabilized zirconia） monolithic cell with a subsequent heat treatment. The open circuit voltage of the LSFN symmetric cell reached 1.18 and 1.0 V in humidified C3H8 and CH4 at 750？？, respective‐ly. The peak power densities of the cells were 400 and 230 mW/cm2 in humidified C3H8 and CH4, respectively. The electrode showed good stability in long term testing, which revealed LSFN has good catalytic activity for hydrocarbon fuel oxidation.

Three-dimensionally ordered macroporous SnO_2-based solid solution catalysts for effective soot oxidation

A series of three‐dimensionally ordered macroporous(3DOM)SnO2‐based catalysts modified by the cations Ce4+,Mn3+,and Cu2+have been prepared by using a colloidal crystal templating method and tested for soot combustion under loose contact condition.XRD and STEM mapping results confirm that all the secondary metal cations have entered the lattice matrix of tetragonal rutile SnO2 to form non‐continuous solid solutions,thus impeding crystallization and improving the surface areas and pore volumes of the modified catalysts.In comparison with regular SnO2 nanoparticles,the 3DOM SnO2 displays evidently improved activity,testifying that the formation of the 3DOM structure can anchor the soot particulates in the macro‐pores,which ensures that the contact of the soot particles with the active sites on the 3DOM skeleton is more easily formed,thus benefiting the target reaction.With the incorporation of the secondary metal cations,the activity of the catalyst can be further improved due to the formation of more abundant mobile oxygen species.In summary,these effects are believed to be the major factors responsible for the activity of the catalyst.

集成固态光量子存储器件研究进展

集成量子存储器在大规模量子网络建设中将扮演核心作用。近年来,人们致力于实现高性能集成光量子存储器件,其中基于稀土掺杂固体材料的集成固态光量子存储器件具有显著优势。此类量子存储器有望支持长时间、高效率、高保真、大带宽和多模式的光量子存储,还易与其他量子功能器件直接集成,发展全集成的量子信息器件。回顾了不同集成固态光量子存储器件的研究进展,包括掺铒石英光纤、钛扩散掺杂铌酸锂波导、飞秒激光直写掺杂波导和聚焦离子束刻蚀掺杂器件等,比较分析了各自的特点、潜力和挑战。