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Journal of Materiomics 2023年第1期9卷 174-182页

作者： Gajula Prasad Xiongwei Lin Junwei Liang yingbang yao Tao Tao Bo Liang Sheng-Guo Lu Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices Guangdong Provincial Key Laboratory on the Functional Soft Condensed MatterSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou510006China Dongguan South China Design Innovation Institute Building D-1University Innovation City AreaSongshan LakeDongguan523808China

Intra porous fibrous membranes have enhanced metal ionic adsorption and oil separation abilities than those of intra nonporous fibrous *** this paper,we prepared highly intra porous fibrous poly(vinylidene fluoride)(PVDF)membranes using an innovated water-mediated electrospinning ***-ATR and XRD techniques confirmed the conversion of non-polarα-phase to polarβ-phase in electrospun *** porous fibrous membrane M–16 had adsorbed oil almost 120%and metal adsorption around 15%,12%,5%,13%respectively for Pb^(2+),Cd^(2+),Cu^(2+)and Zn^(2+),which are larger than the counterpart of nonporous M–*** nonporous fibrous membranes have better peak to peak output voltage(Vp-Vp)2 to 3 times than the porous fibrous membranes(M–16).The results show apparent potential applications in wastewater/oil spill treatment as well as piezoelectric sensors.

关键词： poly(vinylidene fluoride) Porous fibrous membrane Metal removal Oil absorption and peak to peak output voltage

Enhanced electrocaloric effect at room temperature in Mn^(2+) doped lead-free(BaSr)TiO_(3) ceramics via a direct measurement

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Journal of Advanced Ceramics 2021年第3期10卷 482-492页

作者： Xiang NIU Xiaodong JIAN Xianyi CHEN Haoxuan LI Wei LIANG yingbang yao Tao TAO Bo LIANG Sheng-Guo LU Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices Guangdong Provincial Key Laboratory of Functional Soft Condensed MatterSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Dongguan South China Design Innovation Institute Dongguan 523808China

(Ba_(1-x)Sr_(x))(MnyTi1-y)O_(3)(BSMT)ceramics with x=35,40 mol%and y=0,0.1,0.2,0.3,0.4,0.5 mol%were prepared using a conventional solid-state reaction *** dielectric and ferroelectric properties were characterized using impedance analysis and polarization-electric field(P-E)hysteresis loop measurements,*** adiabatic temperature drop was directly measured using a thermocouple when the applied electric field was *** results indicate that high permittivity and low dielectric losses were obtained by doping 0.1-0.4 mol%of manganese ions in(BaSr)TiO_(3)(BST)specimens.A maximum electrocaloric effect(ECE)of 2.75 K in temperature change with electrocaloric strength of 0.55 K·(MV/m)^(-1)was directly obtained at~21℃and 50 kV/cm in Ba_(0.6)Sr_(0.4)Mn_(0.001)Ti_(0.999)O_(3) sample,offering a promising ECE material for practical refrigeration devices working at room temperature.

关键词： barium strontium titanate ceramics permittivity dielectric loss electrocaloric effect electrocaloric strength

Enhancement of solvent uptake in porous PVDF nanofibers derived by a water-mediated electrospinning technique

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Journal of Materiomics 2021年第2期7卷 244-253页

作者： Gajula Prasad Jun-Wei Liang Wei Zhao yingbang yao Tao Tao Bo Liang Sheng-Guo Lu Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices Guangzhou510006China Guangdong Provincial Key Laboratory on the Functional Soft Condensed Matter Guangzhou510006China School of Materials and Energy Guangdong University of TechnologyGuangzhou510006China Dongguan South China Design Innovation Institute Building D-1University Innovation City AreaSongshan LakeDongguan523808China

The effect of a N,N-dimethylformamide(DMF)/acetone solvent system(3:7,4:6,5:5,6:4,7:3)and spinning medium(air and water)on the membrane morphology and the structure-property relationship were investigated.A facile method was optimized to generate a porous,polymer-fiber membrane via the combinative effect of electrospinning and thermally inducing phase separation of the DMF/acetone(4:6)solvent system in a water *** attenuated total reflection(ATR)-Fourier transform infrared(FTIR)results showed an increased b-phase compared to the pristine poly(vinylidene fluoride)(PVDF).The XRD and DSC results further confirmed that the co-existing a-and b-phases in the pristine PVDF were converted into a unique b-phase in the electrospun *** addition,the solvent uptake percentage of the DMF/acetone(4:6)solvent system in a water medium(540)is much greater than that in an air medium(320),and over two times better than that of commercial polyethylene(PE)membranes(190).Similarly,the discharge capacity of the PVDF membrane separator prepared with the DMF/acetone(4:6)solvent system in a water medium is higher than that of the air *** enhancement of solvent uptake might be due to the interconnected porous morphology present in the water medium.

关键词： Polyvinylidene fluoride Electrospinning Thermally induced phase separation Viscosity Porous fibers Discharge capacity Solvent uptake

Field-driven merging of polarizations and enhanced electrocaloric effect in BaTiO_(3)-based lead-free ceramics

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Journal of Advanced Ceramics 2022年第11期11卷 1777-1788页

作者： Xiang NIU Xiaodong JIAN Weiping GONG Wei LIANG Xuetian GONG Guangzu ZHANG Shenglin JIANG Kun YU Xiaobo ZHAO yingbang yao Tao TAO Bo LIANG Sheng-Guo LU Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices Huizhou UniversityHuizhou 516007China Science and Technology on Reliability Physics and Application of Electronic Component Laboratory The 5th Electronics Research Institute of the Ministry of Industry and Information TechnologyGuangzhou 510610China Dongguan South China Design Innovation Institute Dongguan 523808China School of Optical and Electronic Information Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China

Solid-state cooling technology based on electrocaloric effect(ECE)has been advanced as an alternative to replace the vapour-compression approach to overcome the releasing of the global warming ***,the development in high ECE materials is still a *** this work,polarization merging strategy was proposed to achieve a large ECE in xBa(Sn_(0.07)Ti_(0.93))O_(3)–(1−x)Ba(Hf_(0.1)Ti_(0.9))O_(3) ferroelectric ceramics,where x=0,0.2,0.4,0.6,0.8,and ***(Sn_(0.07)Ti_(0.93))O_(3) with an orthorhombic phase and Ba(Hf_(0.1)Ti_(0.9))O_(3) with a rhombohedral phase at room temperature were prepared beforehand as precursors,and phase-coexisted xBSnT–(1−x)BHfT ceramics were formed via a solid-state reaction *** coexisting structures were confirmed using the X-ray *** merged polarization was confirmed by the dielectric and ferroelectric *** ECEs were obtained for 0.2BSnT–0.8BHfT ceramics,i.e.,adiabatic temperature change DT=2.16±0.08 K at 80℃and 5 MV/m,and DT=3.35±0.09 K at 80℃and 7 MV/m.

关键词： lead-free ferroelectric microstructure permittivity polarization electrocaloric effect(ECE)

Efficient Ni_(2)V_(2)O_(7) catalyst for high-performance Li–S batteries

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ChemPhysMater

ChemPhysMater 2024年第4期3卷 481-489页

作者： Hengxue Zhou Jialiang Wang Yeba Yan Yue Fang Yi Long Bo Liang yingbang yao Shengguo Lu Tao Tao School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China

Although Li–S batteries have a high theoretical capacity,their application are significantly hindered by the complex shuttle effect of *** address the issues,in this paper,Ni_(2)V_(2)O_(7) prepared by a simple method is proposed as an efficient catalyst for S ***_(2)V_(2)O_(7) composed of Ni–O octahedra and V–O tetrahedra has a specific electronic *** Ni and V atoms interacted,enabling a fast kinetics of polysulfide ***,Ni_(2)V_(2)O_(7) contains metal sites(Ni and V)and oxygen vacancies,providing a high adsorption capacity and abundant active sites for polysulfide ***,Li–S batteries consisting of Ni_(2)V_(2)O_(7)-based cathodes exhibit an excellent cycling stability with a capacity of 1061 mAh g^(−1) and capacity retention of 87.6%after 150 cycles at 0.2 ***,at 1 C rate,the batteries exhibit a capacity of 706 mAh g^(−1) after 300 cycles with a minimal capacity decay of only 0.08%per cycle.

关键词： Ni_(2)V_(2)O_(7) Li-S batteries Catalyst Adsorption

锡钛酸钡BaSnxTi1–xO3厚膜陶瓷的大电卡效应

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硅酸盐学报 2018年第9期46卷 1183-1190页

作者：李江路标李丹丹姚英邦梁波陶涛鲁圣国广东省功能软凝聚态物质重点实验室广东工业大学材料与能源学院

对无铅铁电材料锡钛酸钡（BaSnxTi1-xO3（BSnT））（x=5%,10%,15%,20%,摩尔比）陶瓷进行了研究,利用流延法得到锡钛酸钡膜带,采用X射线衍射技术对烧结后的厚膜陶瓷进行结构分析,利用扫描电子显微镜分析了样品形貌,测量了样品介温关系和... 详细信息

对无铅铁电材料锡钛酸钡（BaSnxTi1-xO3（BSnT））（x=5%,10%,15%,20%,摩尔比）陶瓷进行了研究,利用流延法得到锡钛酸钡膜带,采用X射线衍射技术对烧结后的厚膜陶瓷进行结构分析,利用扫描电子显微镜分析了样品形貌,测量了样品介温关系和电滞回线,并利用Maxwell关系对电卡效应进行了计算。结果表明：厚膜陶瓷BSnT在不同的Sn4＋掺杂量下的电卡效应有明显的差异,在x=0.05及外加电场10 MV/m时,绝热温变（△T）可达到2.1 K,且x=0.05的样品在5 MV/m的电卡效率最高达到0.24×10^6 K·m·V–1。无铅铁电陶瓷拥有大的电卡效应可望在制冷器件上作为制冷剂使用。

关键词：电卡效应流延法厚膜陶瓷锡钛酸钡

固相反应法制备高储能密度及高储能效率的驰豫型反铁电PLZT陶瓷

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硅酸盐学报 2019年第6期47卷 764-770页

作者：钟米昌路标邹艺轩姚英邦梁波陶涛鲁圣国广东省智能材料和能量转化器件工程技术研究中心广东省功能软凝聚态物质重点实验室广东工业大学材料与能源学院

通过固相反应法制备了锆钛酸铅镧(PLZT)陶瓷并研究了其储能特性。根据室温下PLZT相图制备了反铁电相和弛豫型铁电体相相界附近的PLZT陶瓷,并选择储能密度和储能效率相对较高的组分通过流延法制备了陶瓷厚膜,并通过电滞回线计算样品的储... 详细信息

通过固相反应法制备了锆钛酸铅镧(PLZT)陶瓷并研究了其储能特性。根据室温下PLZT相图制备了反铁电相和弛豫型铁电体相相界附近的PLZT陶瓷,并选择储能密度和储能效率相对较高的组分通过流延法制备了陶瓷厚膜,并通过电滞回线计算样品的储能密度和储能效率。结果表明:所制备的样品同时表现出反铁电特性和弛豫型铁电体特性,样品室温下的储能密度能达到0.61 J/cm^3,同组分厚膜陶瓷室温下储能密度能达到1.414 J/cm^3;样品储能效率能达到94.4%;且样品的储能密度和储能效率随温度的变化表现出不同的变化趋势。

关键词：锆钛酸镧铅陶瓷弛豫型反铁电体固相反应储能密度储能效率

BaZr_(0.2)Ti_(0.8)O_3无铅厚膜陶瓷的电卡效应

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硅酸盐学报 2017年第3期45卷 333-338页

作者：简晓东路标李丹丹姚英邦梁波陶涛鲁圣国广东省功能软凝聚态物质重点实验室广东工业大学材料与能源学院广州510006

通过流延法与常压空气气氛固相烧结工艺制备锆钛酸钡(Ba(Zr_(0.2)Ti_(0.8))O_3)无铅厚膜陶瓷,用X射线衍射仪、扫描电子显微镜、Agilent 4284A阻抗分析仪和RADIANT RT–66A铁电分析仪对其晶体结构、微观形貌、电学性能进行了表征,用Maxw... 详细信息

通过流延法与常压空气气氛固相烧结工艺制备锆钛酸钡(Ba(Zr_(0.2)Ti_(0.8))O_3)无铅厚膜陶瓷,用X射线衍射仪、扫描电子显微镜、Agilent 4284A阻抗分析仪和RADIANT RT–66A铁电分析仪对其晶体结构、微观形貌、电学性能进行了表征,用Maxwell关系估算了材料的电卡效应,即等温熵变和绝热温变。结果表明:Ba(Zr_(0.2)Ti_(0.8))O_3厚膜陶瓷钙钛矿相纯且结构完整,微观结构致密;Ba(Zr_(0.2)Ti_(0.8))O_3厚膜陶瓷呈现弛豫型铁电体特征;材料具有良好的极化特性,耐击穿电压达20 MV/m。材料的绝热温变ΔT在电场20 MV/m及温度100℃时达1.2 K。

关键词：锆钛酸钡厚膜陶瓷电滞回线电卡效应

基于水热合成粉末的Ba0.6Sr0.4TiO3厚膜陶瓷及其大电卡效应

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硅酸盐学报 2019年第12期47卷 1698-1703页

作者：邹艺轩黄咏安钟米昌姚英邦陶涛梁波鲁圣国广东省智能材料和能量转化器件工程技术研究中心广东省功能软凝聚态物质重点实验室广东工业大学材料与能源学院

通过两步水热法制备了纳米钛酸锶钡(Ba0.6Sr0.4 TiO3)粉体,利用流延成型法得到钛酸锶钡厚膜生坯,通过叠压、静水压、排胶及烧结后得到厚膜陶瓷。使用X射线衍射仪、扫描电子显微镜、精密阻抗分析仪和铁电测试平台对其晶体结构、形貌、介... 详细信息

通过两步水热法制备了纳米钛酸锶钡(Ba0.6Sr0.4 TiO3)粉体,利用流延成型法得到钛酸锶钡厚膜生坯,通过叠压、静水压、排胶及烧结后得到厚膜陶瓷。使用X射线衍射仪、扫描电子显微镜、精密阻抗分析仪和铁电测试平台对其晶体结构、形貌、介电性能以及铁电性能进行了表征。结果表明:两步水热法得到的钛酸锶钡纳米粉体形貌为均匀的准立方体,平均颗粒尺寸为50nm。烧结成厚膜陶瓷后平均晶粒尺寸达到2.2μm。通过电滞回线分析得到不同温度和电场下的极化强度,利用Maxwell关系得到电卡效应的绝热温变在温度253K以及电场5MV/m下达到0.62K。

关键词：钛酸锶钡两步水热法电卡效应多层陶瓷电容器

钛酸锶钡(Ba0.7Sr0.3TiO3)厚膜陶瓷的大电卡效应和储能密度

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硅酸盐学报 2018年第6期46卷 801-806页

作者：代广周路标李丹丹姚英邦陶涛梁波鲁圣国广东省智能材料和能量转化器件工程技术中心广东省功能软凝聚态物质重点实验室广东工业大学材料与能源学院

采用固相反应法制备了钛酸锶钡（Ba0.7Sr0.3TiO33）精细粉体,通过流延法制备出厚度约55μm的厚膜陶瓷。利用X射线衍射和扫描电子显微镜分析了样品的物相组成和微观形貌。利用阻抗分析仪和铁电电滞回线测试仪测量了厚膜陶瓷样品的介电性... 详细信息

采用固相反应法制备了钛酸锶钡（Ba0.7Sr0.3TiO33）精细粉体,通过流延法制备出厚度约55μm的厚膜陶瓷。利用X射线衍射和扫描电子显微镜分析了样品的物相组成和微观形貌。利用阻抗分析仪和铁电电滞回线测试仪测量了厚膜陶瓷样品的介电性能和铁电性能。根据Maxwell关系估算了电卡效应,并根据电滞回线计算了储能密度和储能效率。结果表明：钛酸锶钡（Ba0.7Sr0.3TiO33）厚膜在330 K（57℃）Curie温度附近、30 MV/m电场下绝热温变达到3.43 K,同时在30 MV/m电场时储能密度达到1.43 J/cm^3,显示出良好的电卡性能和储能特性。

关键词：钛酸锶钡厚膜陶瓷电卡效应储能性能