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Research advances on electrode materials for solid oxide electrolysis cells

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Progress in Natural Science:Materials International 2023年第3期33卷 309-319页

作者： Hongyuan Su Duoli Wu Chengxin li changjiu li Chao Zhang College of Mechanical Engineering Yangzhou University State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University

Solid oxide electrolytic cell(SOEC) is an energy conversion device that transfers electrical energy into chemical energy. It has garnered significant attention due to its high efficiency and thick current density. The oxygen evolution reaction(OER) and the hydrogen evolution reaction(HER) are two crucial half-reactions of SOEC, while both require excellent electrochemical performance under high-temperature and high-humidity ***, high catalytic activity and good stability of electrode materials are crucial for the practical application of SOEC. The perovskite structure of the oxygen electrodes has outstanding OER activity, while metal ceramic and metal oxide hydrogen electrodes possess good redox properties. This article firstly demonstrates the influence of the physical and electrochemical properties of electrode materials on the performance of SOEC, then illustrates the optimization strategies for electrode materials to improve electrolysis efficiency and extend service ***, the research priorities for the future development of electrode material are summarized.

关键词： Solid oxide electrolysis cell Oxygen electrode Hydrogen electrode Perovskite oxide

Influence of Atmospheric Plasma-Sprayed Composite Cathode on the Performance of Solid Oxide Fuel Cells

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稀有金属材料与工程 2012年第S1期41卷 448-452页

作者： li Chengxin Yang Guanjun li changjiu Xi An Jiao Tong Univ State Key Lab Mech Behav Mat Xian 710049 Peoples R China

Ni-Al2O3 cermet supported tubular solid oxide fuel cells(SOFCs)with different cathodes were fabricated by thermal *** anode,electrolyte and cathode were deposited by atmospheric plasma spraying(APS)aimed at reducing the manufacturing cost of *** porous composite cathodes of lanthanum strontium manganite(LSM)and yttria-stabilized zirconia(YSZ),lanthanum strontium cobalt oxide(LSC)and YSZ,LSC and scandia-stabilized zirconia(ScSZ)were prepared to investigate influence of cathode constitutions on the cell's *** electrode polarization can be improved through using a composite *** maximum power density of the cell with APS YSZ electrolyte and LSC/ScSZ composite cathode is increased about 12%than pure LSM *** maximum output power density of the cell with APS ScSZ electrolyte and LSC/ScSZ composite cathode reaches 1.0 W/cm 2 at 1000 o *** further optimization of the performance of plasma-sprayed composite cathode can be made through improving the interface contact between YSZ electrolyte and composite cathode.

关键词： solid oxide fuel cell plasma spraying,composite cathode lanthanum strontium manganate lanthanum strontium cobalt oxide

Correlating particle impact condition with microstructure and properties of the cold-sprayed metallic deposits

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Journal of Materials Science & Technology 2020年第5期40卷 185-195页

作者： Yujuan li Yingkang Wei Xiaotao Luo changjiu li Ninshu Ma State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an710049China Joining and Welding Research Institute Osaka UniversityOsaka 567-0047Japan

Inter-particle bonding is an important factor affecting the property of cold sprayed metallic *** the interface bonding between particles in deposit is directly determined by plastic strain of particles during spraying,Cu deposits were made at series of impact velocities of 578 m s^-1 to 745 m s^-1 and 807 m s^-1 to correlate particle impact condition with microstructure and properties of the *** show that as the average particle impact velocity increases from 578 m s^-1 to 745 m s^-1 and 807 m s^-1,the deposition efficiency of feedstock powder increases from 58%to 84%and even to 95%.Although all three deposits reveal dense microstructure due to the high ductility of Cu,the deformation degree of the deposited particles remarkably increases with increasing impact *** enhanced plastic deformation of the deposited particles leads to more dispersed oxide scale and thereby stronger interparticle bonding with the strength of the deposit along the deposition direction increasing from 25.8 MPa to 148.5 *** electrical and thermal conductivities at through-thickness direction of the deposit at particle impact velocity of 807 m s^-1 are 78%IACS,295 W m^-1 K^-1,respectively.

关键词： Cold spray Particle impact velocity Deposition efficiency Electrical conductivity Thermal conductivity Mechanical property

Influence of TiCl_4 treatment on performance of dye-sensitized solar cell assembled with nano-TiO_2 coating deposited by vacuum cold spraying

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Rare Metals 2006年第z1期25卷 163-168页

作者： FAN Shengqiang li changjiu YANG Guanjun ZHANG lingzi State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi''an Jiaotong University Xi''an 710049China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi''an Jiaotong University Xi''an 710049China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi''an Jiaotong University Xi''an 710049China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi''an Jiaotong University Xi''an 710049China

Titanium tetrachloride (TiCl4) treatment was employed to TiO2 coating deposited on fluoride-doped tin oxide (FTO) conducting glass and indium oxide doped tin oxide (ITO) conducting glass, respectively. The nano-crystalline TiO2 coating was deposited using a composite powder composed of polyethylene glycol (PEG) and 25 nm TiO2 particles by vacuum cold spraying (VCS) process. A commercial N-719 dye was used to adsorb on the surface of TiO2 coating to prepare TiO2 electrode, which was applied to assemble dye-sensitized solar cell (DSC). The cell performance was measured under simulated solar light at an intensity of 100 mW·cm-2. Results show that with an FTO substrate the DSC composed of a VCS TiO2 electrode untreated by TiCl4 gives a short-circuit current density of 13.1 mA·cm-2 and an open circuit voltage of 0.60 V corresponding to an overall conversion efficiency of 4.4%. It is found that after TiCl4 treatment to the VCS TiO2 electrode with an FTO substrate, the short circuit current density of the cell increases by 31%, the open-circuit voltage increases by 60 mV and a higher conversion yield of 6.5% was obtained. However, when an ITO substrate is used to deposit TiO2 coating by VCS, after TiCl4 treatment, the conversion efficiency of the assembled cell reduces slightly due to corrosion of the conducting layer on the ITO glass by TiCl4.

关键词： titanium tetrachloride treatment vacuum cold spraying dye-sensitized solar cell nano-crystalline TiO2 coating

Influence of Deposition Temperature on the Splat Bonding and Mechanical Properties of Plasma-Sprayed Tungsten Coatings

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稀有金属材料与工程 2012年第S1期41卷 394-398页

作者： Yang Guanjun Kang Xiaohu li Chengxin li changjiu Xi An Jiao Tong Univ State Key Lab Mech Behav Mat Xian 710049 Peoples R China

The mechanical properties of thermally sprayed metallic coatings are limited by the bonding between *** this study,tungsten coatings were deposited at different deposition temperatures by controlling the substrate temperature through shrouded plasma *** dependence of the splat bonding and mechanical properties of W coatings on deposition temperature was *** results showed that the apparent porosity of the coatings decreased from 3.2%to 0.3%with the increase of the deposition *** Young's modulus of W coating was significantly increased from 128 to 307 GPa as the deposition temperature increased from room temperature to 800°*** microhardness of the coatings was less influenced by the deposition *** was found that splat bonding across lamellae was formed when the deposition temperature was higher than 600°C compared to the obvious lamellae interface in the coatings deposited at temperatures lower than 600°*** results evidently revealed that the mechanical properties of plasma-sprayed W coatings could be controlled through the splat bonding by altering deposition temperature.

关键词： plasma spraying tungsten coatings deposition temperature splats bonding hardness elastic modulus

Formation of Iron-aluminide Coating through Annealing of Shrouded Plasma-sprayed Iron/Aluminum Composite

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稀有金属材料与工程 2012年第S1期41卷 467-471页

作者： Tian lihui li Chengxin Yang Guanjun li changjiu Xi An Jiao Tong Univ State Key Lab Mech Behav Mat Xian 710049 Peoples R China

The formation of iron aluminide coating was attempted through annealing of plasma-sprayed iron/aluminum composite *** plasma spraying with nitrogen as protective gas was employed to prepare iron/aluminum composite coating using mechanically blended iron and aluminum powders with Fe/Al atomic ratio of 65:*** of the as-sprayed coating was carried out in argon atmosphere at 450,500,550,and 600 o C for different *** microstructure of the coatings was characterized by scanning electron microscopy and X-ray *** effect of annealing on the microstructure and phase evolution in the coatings was *** results show that iron/aluminum composite coating with low oxide inclusions and porosity is deposited by shrouded plasma *** is found that Fe2Al5 intermetallics forms as an intermediate phase in the composite coating during *** the annealing duration and temperature increase,iron aluminide intermetallic phases in the coatings increase and the microstructure becomes more *** annealing at 600 o C for 336 h,FeAl and Fe3Al intermetallic phases will present in the coating as the main phases.

关键词： shrouded plasma spraying annealing iron aluminide iron/aluminum composite coating intermetallics microstructure

Micro-nano structured functional coatings deposited by liquid plasma spraying

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Journal of Advanced Ceramics 2020年第5期9卷 517-534页

作者： Yuchun HUAN Kaidi WU changjiu li Hanlin liAO Marc DEBliQUY Chao ZHANG College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China ICB UMR 6303 CNRSUniversite de Bourgogne Franche-ComteUTBM90010 BelfortFrance Service de Science des Materiaux Faculte PolytechniqueUniversite de Mons7000 MonsBelgium

Inspired by the micro-nano structure on the surface of biological materials or living organisms,micro-nano structure has been widely investigated in the field of functional *** to its large specific surface area,porosity,and dual-scale structure,it has recently attracted special *** typical fabrication processes of micro-nano structured coatings include sol-gel,hydrothermal synthesis,chemical vapor deposition,*** paper presents the main features of a recent deposition and synthesis technique,liquid plasma spraying(LPS).LPS is an important technical improvement of atmospheric plasma *** with atmospheric plasma spraying,LPS is more suitable for preparing functional coatings with micro-nano ***-nano structured coatings are mainly classified into hierarchical-structure and *** present study reviews the preparation technology,structural characteristics,functional properties,and potential applications of LPS coatings with a micro-nano *** micro-nano structured coatings obtained through tailoring the structure will present excellent performances.

关键词： liquid plasma spraying(LPS) composite spraying micro-nano structure functional coatings

Preparation of Flexible Pt Counter Electrode on Indium-doped Tin Oxide Coated Polyethylene Naphthalate for Dye-sensitized Solar Cells

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稀有金属材料与工程 2012年第S1期41卷 464-466页

作者： He Xuelong liu Mei Yang Guanjun Fan Shengqiang li changjiu li Chengxin Xi An Jiao Tong Univ State Key Lab Mech Behav Mat Xian 710049 Peoples R China Univ Queensland Brisbane Qld 4072 Australia

Flexible Pt counter electrode(CE)was prepared by a simple and fast electroless deposition on indium-doped tin oxide coated polyethylene naphthalate(ITO-PEN)plastic substrate for dye-sensitized solar cells(DSCs).The obtained Pt CE shows a high electrocatalytic activity for triiodide reduction and a low charge transfer resistance of 0.58Ω.cm *** assembled DSC exhibits an overall energy conversion efficiency of up to 4.53%,which is comparable to that of the DSC with sputtered Pt CE(4.74%).The present results indicate that the electroless deposition is an effective approach to prepare plastic Pt CEs as an alternative of the sputtering technology.

关键词： electroless deposition counter electrode dye-sensitized solar cells electrochemical impedance spectroscopy charge transfer resistance

The Oxidation State of Sulfur Detected in Na_2O-CaO-SiO_2 Float Glass by X-ray Absorption Near Edge Structure Spectra

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Journal of Wuhan University of Technology(Materials Science) 2013年第1期28卷 79-81页

作者：孟政 JIANG Hong HUANG Yourong li changjiu WANG Jinzhen CUI Zhu China Building Materials Academy College of Materials and Chemical Engineering Hainan University

The oxidation state of sulfur is detected in Na20-CaO-SiO2 float glass by synchrotron radiation X-ray absorption near edge structure （XANES） spectra at the sulfur K edge. The measured spectra show the only presence of S^6＋ in the Na20-CaO-SiO2 float glass and the oxidation state of sulfur do not change with the increase of glass depth. It is also found that, after the melt has gone through the molten tin bath, the S^6＋ is the dominant species, but S^2- is also present on both surfaces. It is not certain whether cation bonds to S^2- or not, because there are many cations dissolved in the melted tin which makes the spectrum complicated.

关键词： XANES sulfur K-edge Na20-CaO-SiO2 float glass oxidation state sulfur speciation