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- 저자 : Qing Kai HAN (검색결과 3 건)
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Han, Bing,Zhao, Kai,Hou, Xiaoxue,Kim, Dong-Jin,Kim, Bok-Hee,Ha, Su,Norton, M. Grant,Xu, Qing,Ahn, Byung-Guk Elsevier 2017 Journal of Power Sources Vol.338 No.-
<P><B>Abstract</B></P> <P>A titanium-doped Ce<SUB>0.8</SUB>Sm<SUB>0.2</SUB>O<SUB>1.9</SUB> composite is developed as an anode component of low temperature solid oxide fuel cells running on methane fuel. Crystallographic parameters of (Ce<SUB>0.8-x</SUB>Ti<SUB>x</SUB>)Sm<SUB>0.2</SUB>O<SUB>2-δ</SUB> (0.00 < x < 0.10) are investigated with respect to the amount of titanium. The composites show a single cubic phase with the titanium amount being in the range of 0.00–0.07, while the lattice parameters decrease with increasing titanium content. The (Ce<SUB>0.8-x</SUB>Ti<SUB>x</SUB>)Sm<SUB>0.2</SUB>O<SUB>2-δ</SUB> composites are applied to an anode-supported single cell consisting of Ni-(Ce<SUB>0.8-x</SUB>Ti<SUB>x</SUB>)Sm<SUB>0.2</SUB>O<SUB>2-δ</SUB> anode/Ce<SUB>0.8</SUB>Sm<SUB>0.2</SUB>O<SUB>1.9</SUB> electrolyte/La<SUB>0.6</SUB>Sr<SUB>0.4</SUB>Co<SUB>0.2</SUB>Fe<SUB>0.8</SUB>O<SUB>3-δ</SUB> cathode. Catalytic properties of Ni-(Ce<SUB>0.8-x</SUB>Ti<SUB>x</SUB>)Sm<SUB>0.2</SUB>O<SUB>2-δ</SUB> are inspected with the electrochemical performance and performance stability of the cells in dry methane fuel. The cell with Ni-(Ce<SUB>0.73</SUB>Ti<SUB>0.07</SUB>)Sm<SUB>0.2</SUB>O<SUB>2-δ</SUB> (x = 0.07) anode displays a low polarization resistance and an optimum maximum power density (679 mW cm<SUP>−2</SUP> at 600 °C). A performance stability investigation indicates that the cell exhibits a fairly low degradation rate of 3 mV h<SUP>−1</SUP> during a 31 h operation in dry methane. These findings suggest the application potential of the titanium doped Ce<SUB>0.8</SUB>Sm<SUB>0.2</SUB>O<SUB>1.9</SUB> for the anode of solid oxide fuel cells.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ti doped Ce<SUB>0.8</SUB>Sm<SUB>0.2</SUB>O<SUB>1.9</SUB> is found to be a potential anode material. </LI> <LI> Ni-(Ce<SUB>0.8-x</SUB>Ti<SUB>x</SUB>)Sm<SUB>0.2</SUB>O<SUB>2-δ</SUB> shows excellent electrochemical performance in methane. </LI> <LI> Good performance stability demonstrates application feasibility of the anode. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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A taxonomic study of genus Teleogryllus from East Asia (Insecta: Orthoptera: Gryllidae)
Hui Lu,Xiao-Yin Wang,Han-Qiang Wang,Kai Li,Zhu-Qing He 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.2
Crickets belonging to Teleogryllus spp. are widely distributed in East Asia and they are difficult to distinguish. In this study, a phylogenetic tree of Teleogryllus is reconstructed by COI gene, and all species can be distinguished well. The possible evolutionary histories of male genitalia, songs and life history are discussed. The result supports establishing subgenera Macroteleogryllus and Brachyteleogryllus of Teleogryllus spp. from East Asia. T. boninensis is moved to Brachyteleogryllus. The calling song of four species includes both long and short chirps, and the rest just have single chirps. The species inhabit sympatrically trend to have different type of calling song. Egg overwinter type evolved several times independently.
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