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Promote the conductivity of solid polymer electrolyte at room temperature by constructing a dual range ionic conduction path

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Journal of Energy Chemistry 2022年第1期31卷 395-403,I0011页

作者： Ruiyang Li Haiming Hua Yuejing Zeng Jin Yang Zhiqiang Chen Peng Zhang Jinbao Zhao College of Chemistry and Chemical Engineering State-Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleState Key Laboratory of Physical Chemistry of Solid SurfacesEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollaborative Innovation Center of Chemistry for Energy MaterialsXiamen UniversityXiamen 361005FujianChina College of Energy Xiamen UniversityXiamen 361102FujianChina

Poly(ethylene oxide)(PEO)is a classic matrix model for solid polymer electrolyte which can not only dissociate lithium-ions(Li^(+)),but also can conduct Li^(+) through segmental motion in ***,the crystal aggregation state of PEO restricts the conduction of Li^(+) especially at room *** this work,an amorphous polymer electrolyte with ethylene oxide(EO)and propylene oxide(PO)block structure(B-PEG@DMC)synthesized by the transesterification is firstly obtained,showing an ionic conductivity value of 1.1×10^(5) S/cm at room temperature(25℃).According to the molecular dynamics(MD)simulation,the PO segments would lead to an inconsecutive and hampered conduction of Li^(+),which is not beneficial to the short range conduction of Li^(+).Thus the effect of transformation of aggregation state on the improveme nt of ionic conductivity is not eno ugh,it is n ecessary to further consider the differe nt coupled behaviours of EO and PO segments with Li^(+).In this way,we blend this amorphous polymer(B-PEG@DMC)with PEO to obtain a dual range ionic conductive solid polymer electrolyte(D-SPE)with further improved ionic conductivity promoted by constructing a dual range fast ionic conduction,which eventually shows a further improved ionic conductivity value of 2.3×10^(5) S/cm at room temperature.

关键词： Solid polymer electrolyte Amorphous polymer Ionic conductivity room temperature Arrhenius equation

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Tungsten Doped Indium Oxide Thin Films Deposited at room temperature by Radio Frequency Magnetron Sputtering

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Journal of Materials Science & Technology 2014年第7期30卷 644-648页

作者： Jiaojiao Pan Wenwen Wang Dongqi Wu Qiang Fu Ding Ma Department of Physics Beihang University

Tungsten doped indium oxide （IWO） thin films were deposited on glass substrate at room temperature by radio frequency reactive magnetron sputtering. Chemical states analysis was carried out, indicating that valence states of element W in the films were W4＋ and W6＋. The effects of sputtering power and film thickness on the surface morphology, optical and electrical properties of IWO thin films were investigated. The IWO thin films had high transmittance in near infrared （NIR） spectral range. The resistivity, carrier mobility and carrier concentration owned their respective optimum values as sputtering power and thickness changed. The asdeposited IWO film with the minimum resistivity of 3.23 × 10^-4 Ω cm was obtained at a sputtering power of 50 W, with carrier mobility of 27.1 cm2 V-1 s-1, carrier concentration of 7.15 × 10^20 cm-3, average transmittance about 80% in visible region and above 75% in NIR region. It may meet the application requirement of high conductivity and transparency in NIR wavelength region.

关键词： In2O3: W thin film Radio frequency magnetron sputtering room temperature Optical and electrical properties

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Fabrication of Silver Nanowire Transparent Electrodes at room temperature

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Nano Research 2011年第12期4卷 1215-1222页

作者： Takehiro Tokuno Masaya Nogi Makoto Karakawa Jinting Jiu Thi Thi Nge Yoshio Aso Katsuaki Suganuma The Institute of Scientific and Industrial Research （ISIR） Osaka University 8-1 Mihogaoka Ibaraki Osaka 567-0047 Japan

Silver nanowires （AgNWs） surrounded by insulating poly（vinylpyrrolidone） have been synthesized by a polyol process and employed as transparent electrodes. The AgNW transparent electrodes can be fabricated by heattreatment at about 200 ℃ which forms connecting junctions between AgNWs. Such a heating process is, however, one of the drawbacks of the fabrication of AgNW electrodes on heat-sensitive substrates. Here it has been demonstrated that the electrical conductivity of AgNW electrodes can be improved by mechanical pressing at 25 MPa for 5 s at room temperature. This simple process results in a low sheet resistance of 8.6 Ω/square and a transparency of 80.0%, equivalent to the properties of the AgNW electrodes heated at 200 ℃. This technique makes it possible to fabricate AgNW transparent electrodes on heat-sensitive substrates. The AgNW electrodes on poly（ethylene terephthalate） films exhibited high stability of their electrical conductivities against the repeated bending test. In addition, the surface roughness of the pressed AgNW electrodes is one-third of that of the heat-treated electrode because the AgNW junctions are mechanically compressed. As a result, an organic solar cell fabricated on the pressed AgNW electrodes exhibited a power conversion as much as those fabricated on indium tin oxide electrodes. These findings enable continuous roll-to-roll processing at room temperature, resulting in relatively simple, inexpensive, and scalable processing that is suitable for forthcoming technologies such as organic solar cells, flexible displays, and touch screens.

关键词： Silver nanowire transparent electrode room temperature flexibility organic solar cell

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Development of permanent magnetic refrigerator at room temperature

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Rare Metals 2006年第Z1期25卷 641-644页

作者： HUANG Jiaohong LIU Jinrong JIN Peiyu YAN Hongwei QIU Jufeng XU Laizi ZHANG Jiuxing Key Lab of Advanced Functional Materials the Ministry of Education Beijing University of Technology Beijing 100022 China Baotou Research Institute of Rare Earths Baotou 014030 China Baotou Research Institute of Rare Earths Baotou 014030 China Baotou Research Institute of Rare Earths Baotou 014030 China Baotou Research Institute of Rare Earths Baotou 014030 China Baotou Research Institute of Rare Earths Baotou 014030 China Baotou Research Institute of Rare Earths Baotou 014030 China Key Lab of Advanced Functional Materials the Ministry of Education Beijing University of Technology Beijing 100022 China

A reciprocating magnetic refrigerator was developed based on the active magnetic regeneration technology. Rare earth metal Gd and intermetallic compound LaFe11.2Co0.7Si1.1 were used as the magnetic operating materials in the machine. The particles of the magnetic operating materials, with diameter of 0.5-2 mm and total mass of 950 g, were mounted in the cooling bed. A magnetic field was assembled using NdFeB rare earth permanent magnets. It had the magnetic field space of Φ 34×200 and the magnetic induction of 1.5 T. The water at pH=10 is used as a heat transfer fluid. When the ambient temperature is 296 K, a temperature span of 18 K was achieved after operation of 45 min at a frequency of 0.178 Hz. The temperature span and the output power increase significantly with the increasing velocity of heat transfer.

关键词： room temperature magnetic refrigerator NdFeB permanent magnet rare earth metal

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Recent advances on “ordered water monolayer that does not completely wet water” at room temperature

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Science China(Physics,Mechanics & Astronomy) 2014年第5期57卷 802-809页

作者： WANG ChunLei YANG YiZhou FANG HaiPing Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences

The molecular scales behavior of interracial water at the solid/liquid interfaces is of a fundamental significance in a diverse set of technical and scientific contexts, ranging from the efficiency of oil mining to the activity of biological molecules. Recently, it has become recognized that, both the physical interactions and the surface morphology have significant impact on the behavior of inter- facial water, including the water structures as well as the wetting properties of the surface. In this review, we summarize some of recent advances in the atom-level pictures of the interfacial water, which exhibits the ordered character on various solid surfaces at room or cryogenic temperature. Special focus has been devoted to the wetting phenomenon of ＂ordered water monolayer that does not completely wet water＂ and the underlying mechanism on model and some real solid surfaces at room temperature. The possible applications of this phenomenon are also discussed.

关键词： ordered water monolayer hydrophobicity/hydrophilicity molecular dynamics simulation hydrogen bond room temperature

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First-principles investigation of the significant anisotropy and ultrahigh thermoelectric efficiency of a novel two-dimensional Ga_(2)I_(2)S_(2) at room temperature

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International Journal of Extreme Manufacturing 2022年第2期4卷 100-112页

作者： Zheng Chang Ke Liu Zhehao Sun Kunpeng Yuan Shuwen Cheng Yufei Gao Xiaoliang Zhang Chen Shen Hongbin Zhang Ning Wang Dawei Tang Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education School of Energy and Power EngineeringDalian University of TechnologyDalian 116024People’s Republic of China Research Office of Propulsion Technology Expace Technology Corporation LimitedBeijing 100176People’s Republic of China Research School of Chemistry Australian National UniversityCanberraACT 2601Australia School of Metallurgy Northeastern UniversityShenyang 100819People’s Republic of China Institut fur Materialwissenschaft Technische Universitat DarmstadtDarmstadt 64283Germany School of Physics University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China

Two-dimensional(2D)thermoelectric(TE)materials have been widely developed;however,some 2D materials exhibit isotropic phonon,electron transport properties,and poor TE performance,which limit their application ***,exploring excellent anisotropic and ultrahigh-performance TE materials are very ***,we first investigate the phonon thermal and TE properties of a novel 2D-connectivity ternary compound named *** paper comprehensively studies the phonon dispersion,phonon anharmonicity,lattice thermal conductivity,electronic structure,carrier mobility,Seebeck coefficient,electrical conductivity,and the dimensionless figure of merit(ZT)versus carrier concentration for 2D Ga_(2)I_(2)S_(2).We conclude that the in-plane lattice thermal conductivities of Ga_(2)I_(2)S_(2) at room temperature(300 K)are found to be 1.55 W mK^(−1) in the X-axis direction(xx-direction)and 3.82 W mK^(−1)in the Y-axis direction(yy-direction),which means its anisotropy ratio reaches ***,the TE performance of p-type and n-type doping 2D Ga2I2S2 also shows significant anisotropy,giving rise to the ZT peak values of p-type doping in xx-and yy-directions being 0.81 and 1.99,respectively,and those of n-type doping reach ultrahigh values of 7.12 and 2.89 at 300 K,which are obviously higher than the reported values for p-type and n-type doping ternary compound Sn2BiX(ZT∼1.70 and∼2.45 at 300 K)(2020 Nano Energy 67104283).This work demonstrates that 2D Ga_(2)I_(2)S_(2) has high anisotropic TE conversion efficiency and can also be used as a new potential room-temperature TE material.

关键词： thermoelectricity strong anisotropy two-dimensional materials room temperature first-principles calculation

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Synthesis of CeO2 nanosheets with a room temperature ionic liquid assisted method

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Journal of Advanced Ceramics 2016年第2期5卷 111-116页

作者： Ting CHEN Zhixiang XIE Weihui JIANG Wan JIANG Xiaojun ZHANG Jianmin LIU School of Material Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science & Engineering Donghua University Shanghai 201620 China

CeO2 nanosheets were directly synthesized by a precipitation process with the aid of 1-butyl-3-methyl-imidazolium ionic liquids at room temperature. The anion species and the concentration of the room temperature ionic liquids (RTILs) have a great influence on the morphology of the resulting products. The as-prepared CeO2 is irregular and agglomerated seriously in the absence of RTILs, while it changes from nanocube to nanosheet with increasing the RTIL concentration or decreasing the polarity and hydrophilicity in the orders [Bmim] Cl > [Bmim] Br > [Bmim] BF4 > [Bmim] PF6. The CeO2 nanocubes have relatively uniform grain size distribution with size of 4.5-6.4 nm, and the nanosheets are assembled by a great deal of nanocrystalline whose length and width extend to hundreds of nanometers. The as-synthesized CeO2 exhibits an excellent removal capacity for the organic pollutant Congo red dye, indicating its potential use in practical wastewater treatment.

关键词： ceria nanocrystalline ionic liquid room temperature catalysis

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The Crystallization Behavior and Stability of Chromite Synthesized in Chromium-Containing Wastewater at room temperature

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Engineering 2022年第2期8卷 67-76页

作者： Jin-Fang Lv Ying-Cong Quan Xiong Tong Yongjun Peng Yong-Xing Zheng Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China School of Chemical Engineering The University of QueenslandBrisbaneQLD 4072Australia

The ferrite process can not only purify wastewater containing heavy metal ions but also recycle valuable metals from wastewater. Therefore, it is considered a promising technology to treat chromiumcontaining wastewater. However, the process has not been extensively applied in industry due to its high synthesis temperature. In this paper, the feasibility of chromite synthesis at room temperature was comprehensively studied. The effects of critical factors on the effluent quality and the crystallization behavior and stability of the synthetic products were investigated. Results showed that the removal ratio of chromium from wastewater was over 99.0%, and the chromium concentration in the supernatant reached the sewage discharge standard after undergoing the ferrite process at room temperature. Increases in the aeration rate, stirring rate, and reaction time were favorable for the formation of stable chromite. The particles obtained by the ferrite process at room temperature were characterized by a compact structure, and the maximum size of the particles reached 52 μm. Chromium gradually entered the spinel crystal structure during the synthesis process, and the molecular formula of the synthetic chromite might be Fe3-xCrxO4, in which x was approximately 0.30. The path of the microscopic reaction was proposed to illuminate the synthesis mechanism of chromite under room temperature conditions. The present study has laid the foundation for the industrial application of the ferrite process in the purification and utilization of chromium-containing wastewater.

关键词： Chromium-containing wastewater Synthesis of chromite room temperature Crystallization behavior Stability

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High ammonia sensitive ability of novel Cu12Sb4S13 quantum dots@reduced graphene oxide nanosheet composites at room temperature

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Chinese Chemical Letters 2020年第8期31卷 2109-2114页

作者： Yueli Liu Binghua Sang Haoran Wang Zijing Wu Yuxuan Wang Ziwei Wang Zhuoyin Peng Wen Chen State Key Laboratory of Silicate Materials for Architectures School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China The Key Laboratory of Efficient&Clean Energy Utilization School of Energy and Power EngineeringChangsha University of Science and TechnologyChangsha 410111China

In the work,rGO nanosheet is synthesized using the typical Hummer’s method,then Cu12Sb4 S13 quantum dots@rGO composites are prepared by solvent thermal method,and Cu12Sb4 S13 quantum dots with the average size of 5 nm are densely distributed on the surface of rGO ***3 gas response of Cu12Sb4 S13quantum dots@rGO nanosheet composites at room te mperature of 25℃is enhanced compared with the pure Cu12Sb4 S13 quantum dots and rGO nanosheet,and the composites possess an excellent stability during the humidity range of 45%-80%with a low detection limit of 1 ppm,which is related with the intrinsic hydrophobicity characteristic of Cu12Sb4 S13 quantum *** also proves that Cu12Sb4 S13quantum dots@rGO nanosheet composites have a quite high selectivity towards ammonia compared with ethanol,methanol,acetone,toluene,hydrogen sulfide and nitrogen dioxide at room *** gas sensing mechanism of the composites is discussed primarily.

关键词： Cu12Sb4S13 quantum dots@rGO nanosheet Composites NH3 room temperature Gas response

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Greener approach towards the facile synthesis of 1,4-dihydropyrano[2,3-c]pyrazol-5-y1 cyanide derivatives at room temperature

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Chinese Chemical Letters 2010年第10期21卷 1175-1179页

作者： Ravi S.Balaskar Sandip N.Gavade Madhav S.Mane Bapurao B.Shingate Murlidhar S.Shingare Dhananjay V.Mane Organic Research Laboratory Department of Chemistry Dr.Babasaheb Ambedkar Marathwada University

This report describes triethylammonium acetate （TEAA） ionic liquid catalyzed one pot synthesis of 6-amino-4-aryl-5-cyano-3- methyl-1-phenyl-1,4-dihydropyrano [2,3-c]pyrazoles by the reaction of aromatic aldehyde, malononitrile and 3-methyl-1-phenyl-2- pyrazolin-5-one at room temperature. TEAA plays dual role as reaction media and catalyst. It can also be easily recovered and reused in several runs. TEAA provides greener reaction protocol to present methodology which obviates the need of organic solvents, expensive and toxic catalyst.

关键词： Triethylammonium acetate (TEAA) 1,4-Dihydropyrano[2,3-c]pyrazol-5-yl cyanides room temperature

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