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Effect of electrochemical oxidation on carbon nanotube electrodes of electric double layer capacitors

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Science China(Technological Sciences) 2012年第4期55卷 913-920页

作者： qiao yingjie LI ChenSha CHEN XingJuan JIAO CaiShan Department of Materials Science Harbin Engineering UniversityHarbin 150001China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Chemistry Engineering Department Harbin Engineering UniversityHarbin 150001China

Electrochemical oxidation of the carbon nanotube (CNT) polarizable electrodes of electric double layer capacitors (EDLCs) was studied. It indicated that electrochemical oxidation elevated the available surface area of the electrodes and introduced some kinds of functional group on the CNT surfaces. The specific capacitances of the polarizable electrodes with organic electrolyte could be enhanced from 22.4 F g-1 to 78.2 F g-1 after electrolysis oxidization. The enhancement of the specific capacitance depends on the extent of electrochemical oxidation. Using acidic electrolyte for electrochemical oxidation has different effects on modifying the performances of the CNT polarizable electrodes compared to using basic electrolyte.

关键词： carbon nanotubes electrodes electrolytic oxidation transmission electron microscopy specific surface

Decorating multiwalled carbon nanotubes with zinc oxide nanoparticles by thermally decomposing Zn-oleate in an organic medium

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Science China(Technological Sciences) 2009年第5期52卷 1254-1257页

作者： LI ChenSha qiao yingjie LI YuNing WU YiLiang Department of Chemical Engineering McMaster UniversityOntario L8S 4L7Canada Department of Materials Science Harbin Engineering UniversityHarbin 150001China Materials Design&Integration Laboratory Xerox Research Centre of CanadaOntario L5K 2L1Canada

Carbon nanotubes decorated with zinc oxide nanoparticles were produced by thermally decomposing a Zn-oleate complex in an octadecene *** structure of the ZnO decorating nanotube surfaces was characterized by transmission electron microscopy,scanning electron microscopy and X-ray *** surfaces were shown to be densely and homogeneously covered by ZnO nanoparticles with a size below 10 *** nanoparticles had the wurtzite hexagonal crystal structure and showed good adhesion to the *** carbon nanotubes decorated by metal oxide nanoparticles were synthesized at relatively low temperature and non-oxidation ***,the large-scale production with low cost can be realized.

关键词： carbon nanotubes transmission electron micrograph zinc oxide decomposition

Genome-Wide Identification of heat shock protein 10/60 Genes in Japanese Flounder (Paralichthys olivaceus) and Their Regulated Expression After Bacterial Infection

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Journal of Ocean University of China 2021年第4期20卷 886-896页

作者： YAN Weijie qiao yingjie LIU Yuxiang LIU Xiumei ZHANG Quanqi WANG Xubo Key Laboratory of Marine Genetics and Breeding Ministry of EducationOcean University of ChinaQingdao 266003China College of Life Sciences Yantai UniversityYantai 264005China

Heat shock proteins 10/60(hsp10/60)are a family of conserved ubiquitously expressed heat shock proteins which are produced by cells in response to exposure to stressful *** the chaperone and housekeeping functions,they are also known to be involved in immune response during bacterial *** this study,we identified and annotated 10 hsp10/60 genes through bioinformatic analysis in Japanese flounder(Paralichthys olivaceus).Among them one member of hsp10(hspe)family and nine members of hsp60(hspd)family were *** and selection pressure analysis showed that the hsp10/60 genes were evolutionarily constrained and their function was ***,hsp10/60 genes were involved in different embryonic and larval stages and acted as the sentinel role in an unchallenged *** addition,we also observed the expression patterns of hsp10/60 genes after Edwardsiella tarda infection,for the first time in Japanese *** out of 10 genes were differentially expressed after bacterial challenges,the significantly regulated expressions of flounder hsp10/60 genes after bacterial infections suggested their involvement in immune response in *** results provide valuable information for clarifying the evolutionary relationship,and early insights of the immune functions of hsp10/60 genes in Japanese flounder.

关键词： heat shock protein Hsp10/60 Japanese flounder Edwardsiella tarda immune response

Enhanced Efficiency of Dye-sensitized Solar Cells Using rGO@TiO2 Nanotube Hybrids

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Chemical Research in Chinese Universities 2018年第2期34卷 269-273页

作者： LIU Rui qiao yingjie SONG Yingjin SONG Kehan LIU Chuan School of Science Harbin University of Commerce Harbin 150076 P. R. China College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 P R. China Department of Chemistry Harbin University Harbin 150050 P. R. China Department of Chemistry Qiqihar University Qiqihar 161006 P. R. China

We established a novel strategy for the synthesis of reduced graphene oxide（rGO）@TiO2 nanotube hybrids using an 18 W UV-assisted photo-catalytic reduction method for utilization as photo-anode of dye-sensitized solar cells（DSSCs）. The photo-conversion efficiency of DSSCs was significantly enhanced after the addition of rGO, and in addition, the photo-anode showed decreased internal resistance. Analysis of rGO@TiO2 hybrids by transmissions scanning electron microscopy（TEM）, X-ray diffraction（XRD）, Raman spectra, N2 adsorption and desorption, atomic force microscopy（AFM） and X-ray photoelectron speetroscopy（XPS） demonstrates that the rGO modified TiO2 nanotubes can increase the short-circuit current and the conversion efficiency of dye-sensitized solar cells. The efficiency is improved by almost two folds as much compared to those of the bare TiO2 nanotubes.

关键词： TiO2 nanotube array, Reduced graphene oxide(rGO) Hybrid Dye-sensitized solar eell(DSSC)

Uncovering the degradation mechanism induced by ion-diffusion kinetics in large-format lithium-ion pouch cells

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Journal of Energy Chemistry 2023年第8期83卷 98-105,I0005页

作者： Shi Zhou Xiaohong Zhang Cong Chen Ming Chen Fanpeng Kong yingjie qiao Jiajun Wang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering University Harbin 150001HeilongjiangChina Chongqing Research Institute of Harbin Institute of Technology Chongqing 401135China

Battery electrochemistry in an actual cell is a complicated behavior influenced by the current density,uniformity,and ion-diffusion distance,*** anisotropism of the lithiation/delithiation degree is usually inevitable,and even worse,due to a trend of big-size cell design,typically such as 4680 and blade cells,which accelerated a battery failure during repeat lithiation and delithiation of *** by that,two big-size pouch cells with big sizes,herein,are selected to reveal the ion-diffusion dependency of the cathodes at different ***,we find that the LiCoO_(2) pouch cell exhibits ~5 A h loss after 120 charge-discharge cycles,but a 15 A h loss is verified in a LiNixMnyCO_(1-x)-yO_(2)(NCM) ***-based imaging analysis indicates that higher ion-diffusion rates in the LiCoO_(2)than that in the LiNixMnyCO_(1-x)-yO_(2)is the determined factor for the anisotropic cathode fading,which is responsible for a severe mechanical issue of particle damage,such as cracks and even pulverization,in the cathode ***,we verify the different locations at the near-tab and bottom of the electrode make it worse due to the ion-diffusion kinetics and temperature,inducing a spatially uneven electrochemistry in the big-size pouch *** findings give an in-depth insight into pouch cell failure and make a guideline for high-energy cell design and development.

关键词： Ah-level lithium-ion pouch cells Cathode materials lon-diffusion kinetics X-ray tomography

Open-cell mullite ceramic foams derived from porous geopolymer precursors with tailored porosity

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Journal of Advanced Ceramics 2023年第2期12卷 279-295页

作者： Jiahuan SHAO Chengying BAI Xinyu LI Kun YANG Ting ZHENG yingjie qiao Lili ZHANG Hongqiang LI Paolo COLOMBO Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China College of Civil Engineering Hunan UniversityChangsha 410082China Department of Industrial Engineering University of Padovavia MarzoloPadova 35131Italy Department of Materials Science and Engineering The Pennsylvania State UniversityState College 16802USA

Porous geopolymer precursors were firstly prepared by the direct foaming method using bauxite,fly ash(FA),and metakaolin(MK)as raw materials,and porous mullite ceramics were prepared after ammonium ion exchange and then high-temperature *** effects of chemical foaming agent concentration,ion-exchange time,and sintering temperature on porous geopolymerderived mullite ceramics were studied,and the optimal preparation parameters were *** have shown that the concentration of blowing agent had great influence on open porosity(q)and porosity and cell size distributions of geopolymer samples,which in turn affected their compressive strength(σ).Duration of the ion exchange had no obvious effect on the sintered samples,and the amount of mullite phase increased with the increase in the sintering *** foams,possessing an open-celled porous structure,closely resembling that of the starting porous geopolymers produced by directly foaming,were obtained by firing at high *** mullite(3Al_(2)O_(3)·2SiO_(2))ceramic foams with total porosity(ε)of 83.52 vol%,high open porosity of 83.23 vol%,and compressive strength of 1.72 MPa were produced after sintering at 1400 for 2 h in℃ air without adding any sintering additives using commercial MK,bauxite,and FA as raw materials.

关键词： porous mullite ceramic porosity porous geopolymer precursor direct foaming nanophase strengthening

Preparation and Mechanical Properties of Micro- and Nano-sized SiC/Fluoroelastomer Composites

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Journal of Wuhan University of Technology(Materials Science) 2013年第4期28卷 658-663页

作者：率志君刘志刚 WANG Donghua ZHOU Pan LI Wanyou qiao yingjie LIU Ruiliang ZHOU Shi College of Power and Energy Engineering Harbin Engineering University College of Materials Science and Chemical Engineering Harbin Engineering University

Microand nano-sized SiC/fluoroelastomer （FKM） composites were prepared by a mechanical mixing method. These composites were first characterized by a rotorless rheometer. Then the effects of micro- and nano-sized SiC on hardness, static and dynamic mechanical properties of the composites were investigated. The increasing amount of the SiC filler increased the curing efficiency of the biphenyl curing system, which was evident from the rheometric properties of the resulting composites. The tensile properties of composite increased with the increasing of micro- and nano-sized SiC content. When the micro- and nano-sized SiC content was higher than 20 phr, the composites showed almost unchanged tensile properties. The increasing of the tensile property was mainly attributed to the well dispersed micro- and nano-sized SiC particles characterized by SEM images. Compared to pure FKM, the composites exhibited a higher glass transition temperature and lower tan peak value.

关键词： fluoroelastomer (FKM) micro- and nano-sized SiC composites mechanical properties

Corrosion protection of AZ31 magnesium alloy treated with La^(3+) modified 3-methacryloxypropyltrimethoxysilane conversion film

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Journal of Rare Earths 2015年第6期33卷 647-654页

作者：乔英杰李文鹏王桂香张晓红 Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University

This study demonstrated the influence of addition concentration of La3＋ on the anti-corrosion behavior of a 3-methacry- loxypropyltrimethoxysilane （MPS） film formed on AZ31 magnesium alloy. The morphology and surface chemistry of the samples were evaluated through scanning electron microscopy （SEM） and Fourier transform infrared spectroscopy （FT-IR）, respectively. The corrosion resistance of the pre-treated AZ31 magnesium alloy was studied during immersion in 0.1 mol/L NaC1 solution, using poten- tiodynamic polarization curves and electrochemical impedance spectra （EIS）. In comparison to MPS film, the low concentration of La3＋ ion modified silane layer exhibited a better anti-corrosion performance, nevertheless, the high concentration of La3＋ ion modified was worse. Results showed that the preferable addition concentration of La3＋ ion in the silane film was 5Х 10-4 mol/L in this experi- ment.

关键词： AZ31 Mg alloy silanes lanthanum corrosion rare earths

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贫油预混预蒸发燃烧室回火现象的大涡模拟

航空学报 2014年第6期35卷 1505-1512页

作者：乔英杰毛荣海中航商用航空发动机有限责任公司上海商用飞机发动机工程技术研究中心上海201108

为研究贫油预混预蒸发(LPP)燃烧室的回火现象及形成机理,基于大涡模拟(LES)及部分预混燃烧模型,对Schneider试验进行数值计算,分别将冷态及燃烧温度场与试验结果进行对比,验证了模型的准确性。将该模型应用于LPP燃烧室,并利用详细的化... 详细信息

为研究贫油预混预蒸发(LPP)燃烧室的回火现象及形成机理,基于大涡模拟(LES)及部分预混燃烧模型,对Schneider试验进行数值计算,分别将冷态及燃烧温度场与试验结果进行对比,验证了模型的准确性。将该模型应用于LPP燃烧室,并利用详细的化学机理对航空煤油火焰传播速度进行修正,成功重现了回火现象的发生并向主燃级上游传递的动态过程,通过流场分析发现局部形成的不规则涡结构在回火现象中扮演着重要角色。进一步从涡量方程的角度对涡结构进行分析,发现燃烧引起的斜压及体积膨胀是诱发回火现象的主要原因。

关键词：贫油预混预蒸发燃烧室回火大涡模拟斜压体积膨胀