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37篇 您的检索式:作者名="Kening Sun"
    题名 作者 年代 出处 被引量
1Progress and challenges of carbon-fueled solid oxide fuel cells anode显示文摘Carbon-fueled solid oxide fuel cells(CF-SOFCs)can electrochemically convert the chemical energy in carbon into electricity,which demonstrate both superior electrical efficiency and fuel utilisation compared to all other types of fuel cells.However,using solid carbon as the fuel of SOFCs also faces some challenges,the fluid mobility and reactive activity of carbon-based fuels are much lower than those of gaseous fuels.Therefore,the anode reaction kinetics plays a crucial role in determining the electrochemical performance of CF-SOFCs.Herein,the progress of various anodes in CF-SOFCs is reviewed from the perspective of material compositions,electrochemical performance and microstructures.Challenges faced in developing high performance anodes for CF-SOFCs are also discussed.Minjian Ma Xiaoxia Yang Jinshuo Qiao Wang Sun Zhenhua Wang Kening Sun 2021Journal of Energy Chemistry2021,30,5:8
2Catalytic performance of hierarchical H-ZSM-5/MCM-41 for methanol dehydration to dimethyl ether显示文摘Micro-mesoporous composite molecular sieves H-ZSM-5/MCM-41 were prepared by the hydrothermal technique with alkali-treated H-ZSM-5zeolite as the source and characterized by scanning electron microscopy,transmission electron microscopy,energy dispersive spectroscopy,X-ray diffraction,N2 adsorption-desorption measurement and NH3 temperature-programmed desorption.The catalytic performances for the methanol dehydration to dimethyl ether over H-ZSM-5/MCM-41 were evaluated.Among these catalysts,H-ZSM-5/MCM-41 prepared with NaOH dosage (nNa/nSi) varying from 0.4 to 0.47 presented excellent catalytic activity with more than 80%methanol conversion and 100%dimethyl ether selectivity in a wide temperature range of 170—300℃,and H-ZSM-5/MCM-41 prepared with nNa/nSi=0.47 showed constant methanol conversion of about 88.7%,100% dimethyl ether selectivity and excellent lifetime at 220℃.The excellent catalytic performances were due to the highly active and uniform acidic sites and the hierarchical porosity in the micro-mesoporous composite molecular sieves.The catalytic mechanism of H-ZSM-5/MCM-41 for the methanol dehydration to dimethyl ether process was also discussed.Yu Sang Hongxiao Liu Shichao He Hansheng Li Qingze Jiao Qin Wu Kening Sun 2013Journal of Energy Chemistry2013,22,5:7
3Fabrication and performance of La(0.8)Sr(0.2)MnO3/YSZ graded composite cathodes for SOFC显示文摘表演多层(1?x ) La0.8Sr0.2MnO3/x YSZ 分级合成阴极为中间的稳固的氧化物燃料房间(SOFC ) 作为电极材料被学习。多层的合成阴极的热扩大系数,电的电导率,和电气化学的性能被调查。热扩大系数和电的电导率随 YSZ 内容的增加减少了。(1 -x)La0.8Sr0.2MnO3/x YSZ 合成阴极极大地在电极,电解质,和煤气的阶段之中增加了活跃三倍的阶段边界线(TPBL ) 的长度,在在极化电流的极化电阻和增加导致减少密度。三倍层的分级的合成阴极(0.77 A/cm2 ) 的极化水流密度是最高并且单层阴极(0.13 A/cm2 ) 的最低。三倍层的分级的合成阴极的极化电阻( Rp )仅仅是 0.182 敤甠?景氠潯敳祬瀠捡?倠?敭慴楬敺?楳楬潣?倨卍??獢牴瑡獥愠摮瀠汯獩敨?畢歬渠捩敫?倨乂??獢牴瑡獥戠?異獬摥氠獡牥搠灥獯瑩潩?吠敨攠晦'太B漠??獢牴瑡?整灭牥瑡牵?漠祸敧?牰獥?敲?湡??獢牴瑡??晲捡?潲杵湨獥?湯琠敨洠捩潲瑳畲瑣牵?景??佯′楦浬?敷敲椠癮獥楴慧整???慨?敢湥映畯摮琠慨??楨桧牥猠'T瑳慲整琠浥数慲畴敲愠摮愠栠杩敨?硯杹湥瀠敲獳牵?慦潶?桴?潦浲瑡潩?景戠瑥整?............?佯′楦浬?吠敨??楌潃?SUN Kening PIAO Jinhua ZHANG Naiqing CHEN Xinbing XU Shen ZHOU Derui 2008Rare Metals2008,27,3:3
4Balancing particle properties for practical lithium-ion batteries显示文摘As a state-of-the-art secondary battery,lithium-ion batteries(LIBs)have dominated the consumer electronics market since Sony unveiled the commercial secondary battery with LiCoO_(2) as the negative electrode material in the early 1990s.The key to the efficient operation of LIBs lies in the effective contact between the Li-ion-rich electrolyte and the active material particles in the electrode.The particle properties of the electrode materials affect the lithium ion diffusion path,diffusion resistance,contact area with the active material,the electrochemical performance and the energy density of batteries.To achieve satisfied comprehensive performance and of LIBs,it is not only necessary to focus on the modification of materials,but also to balance the properties of electrode material particles.Therefore,in this review,we analyze the influence of particle properties on the battery performance from three perspectives:particle size,particle size distribution,and particle shape.A deep understanding of the effect and mechanism of particles on electrodes and batteries will help develop and manufacture practical LIBs.Jing Zhang Jinshuo Qiao Kening Sun Zhenhua Wang 2022Particuology2022,20,2:2
5Synthesis of La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ) Powder for Solid Oxide Fuel Cell by a Nitrate-Citrate Combustion Route显示文摘A nitrate-citrate combustion route to synthesize La0.9Sr0.1 Ga0.8 Mg0.2O3-δ powder for solid oxide fuel cell application was presented. This route is based on the gelling of nitrate solutions by the addition of citric acid and ammonium hydroxide, followed by an intense combustion process due to an exothermic redox reaction between nitrate and citrate ions. The optimum technical parameters are that the pH value is 5, and the molar ratio of citric acid to the total metallic ion is 1.5:1. X-ray diffraction characterization of calcined gel shows that pure phase was synthesized after calcination at 1400℃ for 10 h, and the TEM result shows the calcined powder with average particle size is about 150 nm. The grain resistance contributes to the total resistance of sintered pellet below 500℃. The conductivity of the sintered pellent at 800℃ was 0.07 S-1.cm-1 higher than the conductivity of YSZ(0.05S-1.cm-1 at 800℃)Naiqing ZHANG, Kening SUN, Derui ZHOU and Ningning WUHarbin Institute of Technology, Harbin 150001, China 2004Journal of Materials Science & Technology2004,20,6:2
6GPCR activation:protonation and membrane potential显示文摘GPCR proteins represent the largest family of signaling membrane proteins in eukaryotic cells.Their importance to basic cell biology,human diseases,and pharma-ceutical interventions is well established.Many crystal structures of GPCR proteins have been reported in both active and inactive conformations.These data indicate that agonist binding alone is not suffi cient to trigger the conformational change of GPCRs necessary for binding of downstream G-proteins,yet other essential factors re-main elusive.Based on analysis of available GPCR crystal structures,we identifi ed a potential conformational switch around the conserved Asp2.50,which consistently shows distinct conformations between inactive and active states.Combining the structural information with the current literature,we propose an energy-coupling mechanism,in which the interaction between a charge change of the GPCR protein and the membrane potential of the living cell plays a key role for GPCR activation.Xuejun C.Zhang Kening Sun Laixing Zhang Xuemei Li Can Cao 2013Protein & Cell2013,4,10:1
7Sealing Glass of Barium-Calcium- Aluminosilicate System for Solid Oxide Fuel Cells显示文摘Piao Jinhua Sun Kening Zhang Naiqing Chen Xinbing Zhou Derui 2007Jouranl of Rare Earths2007,25,4:1
8自清洁钙钛矿型催化剂用于甲烷干气重整(英文)显示文摘Gas-to-liquid processes are generally used to convert natural gas or other gaseous hydrocarbons into liquid fuels via an intermediate syngas stream. This includes the production of liquid fuels from biomass‐derived sources such as biogas. For example, the dry reforming of methane is done by reacting CH4 and CO2, the two main components of natural biogas, into more valuable products, i.e.,CO and H2. Nickel containing perovskite type catalysts can promote this reaction, yielding good conversions and selectivities; however, they are prone to coke laydown under certain operating conditions. We investigated the addition of high oxygen mobility dopants such as CeO2, ZrO2, or YSZ to reduce carbon laydown, particularly using reaction conditions that normally result in rapid cok‐ing. While doping with YSZ, YDC, GDC, and SDC did not result in any improvement, we show that a Ni perovskite catalyst (Na0.5La0.5Ni0.3Al0.7O2.5) doped with 80.9 ZrO2 15.2 CeO2 gave the lowest amount of carbon formation at 800 °C and activity was maintained over the operating time.María Natividad Pérez-Camacho Jehad Abu-Dahrieh Alexre Goguet Kening Sun David Rooney 2014催化学报2014,35,8:1
9Investigation on silver electric adhesive doped with Al2O3 ceramic particles foe sealing planar solid oxide fuel cell显示文摘Zhou Xiaoliang Sun Kening Yan Yan 2009J Power Sources2009,192,:1
10Ni–YSZ andNi–CeO2/YSZ anodes prepared by impregnation for solid oxide fuelcells显示文摘QIAO Jinshuo SUN Kening ZHANG Naiqing 2007J Power Sources2007,169,25:1
11Novel compressive seals for solid oxide fuel eells显示文摘Shiru Le Kening Sun Naiqing Zhang 2006Journal of Power Sources2006,,161:1
12Sealing glass of bsuium-ca1cium-aluminosilicate system for solid oxide fuel cells显示文摘PIAOJinhua SUN Kening ZHANG Naiqing 2007J Rare Earths2007,25,:1
13Porous conductive interlayer for dendrite-free lithium metal battery显示文摘Lithium(Li) metal,possessing ultrahigh theoretical capacity and the lowest electrode potential,is regarded as a promising new generation anode material.However,the uncontrollable growth of Li dendrites during cycling process gives rise to problems as capacity decay and short circuit,suppressing the cycling and safety performances of Li metal battery.In this contribution,porous conductive interlayer(PCI),composed of carbon nanofibers(CNFs) and polyisophthaloyl metaphenylene diamine(PMIA),is developed to suppress Li dendrites and stabilize Li metal anode.PCI possesses the excellent conductive ability of CNFs and the preeminent mechanical properties of PMIA at the same time.When Li metal contacts with PCI during cycling process,an equipotential surface forms on their interface,which eliminates the tip effect on Li anode and homogenizes Li-ions flux in combination with the uniform porous structure of PCI.Employed PCI,the Li|Cu cell exhibits a remarkable cycling stability with a high average Coulombic efficiency of 97.5% for 100 cycles at 0.5 mA cm^(-2).And the Li|LiFePO_4 cell exhibits improved rate capability(114.7 mAh g^(-1) at 5.0 C) and enhanced cycling performance(78.9% capacity retention rate over 500 cycles at 1.0 C).This work provides a fresh and effective solving strategy for the problem of dendrites in Li metal battery.Hui Liu Daichong Peng Tianye Xu Kedi Cai Kening Sun Zhenhua Wang 2021Journal of Energy Chemistry2021,30,2:1
14Copper oxide nanoleaves decorated multi-walled carbon nanotube as platform for glucose sensing 显示文摘Yang Zhiyu Feng Jinsheng Qiao Jinshuo Yan Yim- ing Yu Qiyao Sun Kening 2012Analytical Methods2012,4,7:1
15Preparation of acid-resistant core/shell Fe 3 O 4 @C materials and their use as catalyst supports显示文摘Tongjie Yao Tieyu Cui Jie Wu Qiuzhi Chen Xiaoju Yin Fang Cui Kening Sun 2012Carbon2012,,6:1
16Upgrading Siberian(Russia)crude oil by hydrodesulfurization in a slurry reactor:A kinetic study显示文摘Hydrodesulfurization(HDS)of sour crude oil is an effective way to address the corrosion problems in refineries,and is an economic way to process sour crude oil in an existing refinery built for sweet oil.In the current study,the HDS of Siberian crude oil was carried out in a slurry reactor.The Co-Mo,Ni-Mo,and Ni-W catalysts supported onγ-Al2O3 were compared at the temperature of 340℃ and the pressure of 4.5 MPa.The HDS activity follows the order of Co-Mo N Ni-Mo N Ni-Wat a high concentration of H2S,and the difference between Co-Mo and Ni-Mo becomes insignificant at a low concentration of H2S.The influence of reaction temperature 320-360℃ and reaction pressure 3-5.5 MPa was investigated,and both play a positive role in the HDS reaction.A kinetic model over Ni-Mo/Al2O3 in the slurry reactor was established.The activation energy is estimated as 60.34 kJ·mol−1;the orders of sulfur components and hydrogen partial pressure are 1.43 and 1.30,respectively.The kinetic parameters are compared with those in a trickle-bed reactor,implying that the mass transfer is greatly enhanced in the slurry reactor.The back mixing effect is present in the slurry reactor and can be reduced by a multi-stage design,which would lead to higher reactor efficiency in industrial application.Kening Sun Xixi Ma Qiuchen Yang Rui Qiu Ruijun Hou 2020Chinese Journal of Chemical Engineering2020,28,12:1
17Highly dispersed Ag nanoparticles (<10nm) deposited on nanocrystalline Li 4 Ti 5 O 12 demonstrating high-rate charge/discharge capability for lithium-ion battery显示文摘Zhimin Liu Naiqing Zhang Zhijun Wang Kening Sun 2012Journal of Power Sources2012,,:1
18Preparation and characterization of nano-tube and nano-rod structured La 0.8 Sr 0.2 MnO 3- δ /Zr 0.92 Y 0.08 O 2 composite cathodes for solid oxide fuel cells显示文摘Naiqing Zhang Juan Li Zhilong He Kening Sun 2011Electrochemistry Communications2011,,6:1
19Ultrathin two-dimensional bimetal NiCo-based MOF nanosheets as ultralight interlayer in lithium-sulfur batteries显示文摘Lithium-sulfur batteries as one of the most promising next-generation high-energy storage system, the shuttle effect, the expansion of cathode and the slow electrode redox kinetics limit its further development. Herein, we report a two-dimensional, ultrathin and ultra-light bimetal-Ni Co-organic framework as the interlayer for Li-S batteries. This kind of interlayer can effectively block polysulfides and accelerate the conversion with a thickness of only 1 μm and a load of 0.1 mg/cm^(2). Because the MOF nanosheets with a thickness of a few nanometers have a large specific surface and a large number of exposed accessible active sites. At the same time, the intrinsic activity of each site is enhanced and the catalytic performance is improved due to the synergistic effect of mixed metals and the unique coordination environment around the active sites. So, 2D NiCo MOF/CNT totally meets the requirements for the lightweight and effective interlayer. The initial discharge capacity of cell with 2D NiCo MOF/CNT interlayer can reach 1132.7 m Ah/g at 0.5 C. It remained 709.1 m Ah/g after 300 cycles, showing good cycling stability and rate performance.Pingli Feng Wenshuo Hou Zhe Bai Yu Bai Kening Sun Zhenhua Wang 2023Chinese Chemical Letters2023,34,4:1
20Electrochemical and microstructural characterization of cyclic redox behaviour of SOFC anodes显示文摘The oxidation of Ni to NiO in solid oxide fuel cell (SOFC) anode will result in large bulk volume change, which may change the interfaces of the two phases in the anode cermet and thus may cause significant performance degradation. The reduction and oxidation (redox) of the Ni/YSZ cermet were studied at 800 ℃. Anodic polarization measurements were performed before and after redox cycles. The anode current density at an overpotential of 100 mV kept decreasing during the whole redox treatment. It decreased from 19.11 to 7.95 mA·cm-2 after two redox cycles. Anode supported unit cell was assembled for cell′s discharge measurements. Cell performance declined after each redox cycle. The maximum power density decreased from 126.28 to 40.32 mW·cm-2. The microstructural changes after redox cycling were recorded using scanning electron microscopy (SEM). The results reveal that after re-oxidation, the Ni gets coarse and has a higher porosity; the nickel network structure turns to be desultory.KONG Jiangrong SUN Kening ZHOU Derui ZHANG Naiqing QIAO Jinshuo 2006Rare Metals2006,25,z1:1
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