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混合导体

混合导体的相关文献在1989年到2022年内共计242篇,主要集中在化学、化学工业、一般工业技术 等领域,其中期刊论文85篇、会议论文12篇、专利文献414209篇;相关期刊49种,包括中国科学技术大学学报、东北大学学报(自然科学版)、南昌航空大学学报(自然科学版)等; 相关会议8种,包括第六届全国膜与膜过程学术报告会、第十二届中国固态离子学学术会议、第二十六届全国化学与物理电源学术年会等;混合导体的相关文献由424位作者贡献,包括杨维慎、王海辉、丛铀等。

混合导体—发文量

期刊论文>

论文:85 占比:0.02%

会议论文>

论文:12 占比:0.00%

专利文献>

论文:414209 占比:99.98%

总计:414306篇

混合导体—发文趋势图

混合导体

-研究学者

  • 杨维慎
  • 王海辉
  • 丛铀
  • 薛健
  • 金万勤
  • 熊国兴
  • 邵宗平
  • 陈初升
  • 丁伟中
  • 朱雪峰
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 刘永光; 袁小龙; 戴磊; 王岭
    • 摘要: 钙钛矿型质子-电子混合导体致密膜是一种很有应用前景的氢分离膜材料,有望在氢气分离和纯化以及膜反应器中得到实际应用。阐述了钙钛矿型质子-电子混合导体透氢膜的透氢原理,并对单相、双相和外部短路法构成的透氢膜体系进行了归纳总结,介绍了其未来的发展方向。
    • 刘永光; 袁小龙; 戴磊; 王岭
    • 摘要: 钙钛矿型质子-电子混合导体致密膜是一种很有应用前景的氢分离膜材料,有望在氢气分离和纯化以及膜反应器中得到实际应用.阐述了钙钛矿型质子-电子混合导体透氢膜的透氢原理,并对单相、双相和外部短路法构成的透氢膜体系进行了归纳总结,介绍了其未来的发展方向.
    • 余觉知; 胡勇胜; 李泓; 黄学杰; 陈立泉
    • 摘要: 将碱金属溶于含有芳香化合物的醚类溶剂,碱金属的一个电子转移给芳香化合物形成一个碱金属离子和一个阴离子自由基,同时溶于醚类溶剂得到一类具有儈电子电导率和离子电导率的蓝黑色液体.当碱金属为钠、芳香化合物为联苯、醚类溶剂为乙二醇二甲醚时,其电子电导率和离子电导率分别为8.4×10?3 S·cm?1和3.6×10?3 S·cm?1,电极电位为0.09 V vs.Na/Na+,适合作为负极材料,具有原材料低廉、易于制备等优点.我们将该液体作为负极,分别以苯醌和蒽醌(AQ)溶液作为正极构建了一种新型二次电池,结果表明以AQ溶液作为正极的电池具有长循环寿命、低成本的优势.该阴离子自由基液态负极材料的提出为开发新型的储能电池提供了新思路.%Electrochemical batteries for wind and solar renewable energy storage have attracted world-wide attention, due to their merits of flexibility, modularity and being environmental friendly. Nowadays, new rechargeable battery systems are highly desired for large-scale electrical energy storage. Here in this paper, we report that alkali metal can be dissolved into aromatic compound-ether solvent to obtain a dark blue solution with high conductivity. This solution consists of alkali metal cation and radical anion generated by electron transfer reaction between alkali metal and aromatic compounds. For instance, sodium and biphenyl can be dissolved into 1,2-dimethoxyethane to obtain a dark blue solution which exhibits high electronic conductivity (8.4 × 10?3 S·cm?1), high ionic conductivity (3.6 × 10?3 S·cm?1), low potential 0.09 V vs. Na/Na+ and low cost. Using this solution as the anode, we demonstrate a new rechargeable battery with quinone liquid cathode. It is found that the battery with anthraquinone (AQ) liquid cathode displays long cycle ability, low cost properties. This work proposes a new strategy for designing the electrode materials and rechargeable battery systems. Furthermore, this kind of liquid may possess other unique physical properties and might be used in other devices, like thermoelectric battery.
    • 张小芳; 刘涛; 于景坤; 高翔
    • 摘要: 采用固相合成法制备了La0.8Sr0.2(Ga0.8Mg0.2)1-xFexO3-δ(LSGMF)混合导体,利用SEM和TGA对LSGMF的性能进行了研究,考察了不同Fe掺杂量对LSGMF的热失重过程及其动力学的影响规律,并采用Coats-Redfem法求解其失重过程的表观活化能.结果表明:LSGMF热失重过程包括三个阶段,低温区域的热失重主要是由于试样表面吸附的H2 O和CO2加热脱附所致,表观活化能为0.154~0.227 eV,中温区域和高温区域的热失重主要归因于晶格位置上的氧离子转变为氧分子并进入气相,表观活化能为0.280~0.350 eV.x=0.9时,LSGMF的失重速率峰值最小(0.0137/s),表观活化能E2+3最大,说明失重速率最慢,材料稳定性最高.%The mixed conductor La0.8 Sr0.2 (Ga0.8 Mg0.2 )1-x FexO3-δ(LSGMF)samples were prepared by solid-state reaction. The performances were researched by scanning electron microscopy (SEM)and thermogravimetric analysis (TGA). The influence of doped Fe content on the thermal weight loss process and kinetics of LSGMF was investigated,and the apparent activation energy for the process was calculated with the Coats-Redfem method. The results showed that the thermal weight loss process of LSGMF can be divided into three stages. In the low-temperature region,the thermal weight loss is mainly caused by desorption of H2 O and CO2 adsorbed on the surface of LSGMF,and the apparent activation energy is 0. 154~0. 227 eV. In the medium and high temperature region,it mainly attributes to some of the lattice oxygen atoms becoming O2 ,and the apparent activation energy is 0. 280 ~0. 350 eV. When the doped Fe content x is 0. 9,the peak value of weight loss rate is the smallest (0. 0137/s),and the apparent activation energy E2+3 is the highest. It indicates that the weight loss rate is the slowest and the stability of LSGMF is the highest.
    • 陈婷; 谢志翔; 胡晓博; 张筱君; 江伟辉; 江莞
    • 摘要: 采用共沉淀法和柠檬酸络合法分别制备了Ce_(0.8)Sm_(0.2)O_(2-δ)-Ca_3Co_2O_(6-δ)粉体,随后通过固相烧结法获得了致密Ce_(0.8)Sm_(0.2)O_(2-δ)-Ca_3Co_2O_(6-δ)双相透氧膜材料。分别通过X射线衍射(XRD)和场发射扫描电子显微镜(FESEM)对样品的晶体结构和形貌进行了表征。系统研究了双相比例对样品的热膨胀系数、电子电导率和透氧率的影响。实验结果表明该双相材料具有优异的化学稳定性,1150°C烧结6 h可以获得致密双相膜。双相膜具有较低的热膨胀系数,为13.47×10^(-6)~14.23×10^(-6)K^(-1),接近电解质的热膨胀系数值。当离子导电相添加量由40wt%增加到80wt%,双相膜的电导率随之降低,而透氧率随之增大,950°C时,质量比为8∶2的Ce_(0.8)Sm_(0.2)O_(2-δ)-Ca_3Co_2O_(6-δ)双相膜的透氧率达到了2.80×10^(-7)mol·cm^(-2)·s^(-1),表明该材料可以作为一种新型双相透氧膜材料用于氧分离。
    • Tai-he Wang; Wei-jia Song; Rong Li; Qiang Zhen
    • 摘要: Fluorite Ce_(0.8)Sm_(0.2)O_(2-δ)(SDC) nanopowder with a crystallite size of 15 nm was synthesized by a co-precipitation method. An SDC porous layer was coated onto a BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ)(BCFN) mixed conductor to improve its oxygen transport behavior. The results show that the SDC-coated BCFN membrane exhibits a remarkably higher oxygen permeation flux(J_(O_2)) than the uncoated BCFN in the partial oxidation of coke oven gas(COG). The maximum J_(O_2) value of the SDC-coated BCFN is 18.28 mL ·min^(-1)·cm^(-2) under a COG/air flux of 177 mL ·min^(-1)/353 mL ·min^(-1) at 875°C when the thickness of the BCFN membrane is 1 mm; this J_(O_2) value is 23% higher than that of the uncoated BCFN membrane. This enhancement is likely because of the higher oxygen ionic conductivity of SDC, which supplies oxygen vacancies and accelerates oxygen exchange on the membrane/coating layer/gas three-phase boundary.
    • 陈婷; 江莞; 江伟辉; 刘健敏; 张筱君; 谢志翔
    • 摘要: 双相混合导体膜在高温下能够同时传导氧离子和电子,具有稳定性好、膨胀系数低、机械强度高和成分可调等优点,可以作为反应器应用于甲烷部分氧化制合成气(POM).但双相混合导体膜的透氧率较低,成为亟待解决的问题.本文从透氧机理入手详细阐述了氧渗透过程的影响因素.在此基础上综述了目前提高双相混合导体膜透氧率的措施,包括了采用混合导体作为电子导电相、降低电子导电相形成连续渗流网络的体积比阀值和减小双相晶粒尺寸,以及宏观上制备出不对称膜、管状膜和中空纤维膜进一步降低膜厚、增大表面积以提高透氧率.最后指出双相混合导体膜在未来需要重点解决的一些问题.
    • 张恒; 王婷婷; 聂毅; 张香平; 林维明
    • 摘要: 采用 SrFe0.6Cu0.3Ti0.1O3-δ混合导体透氧膜组装成膜催化反应器,进行甲烷部分氧化制合成气反应,考察了反应温度、空速、催化剂粒径等条件的影响,并分析了反应气氛引起的透氧膜结构变化情况。结果表明,在膜反应器内,催化反应与透氧过程存在相互制约和相互促进的关系。在膜反应器内进行甲烷部分氧化反应后,透氧膜的两侧表面均发生蚀刻现象,结晶度显著降低,反应侧蚀刻现象较为严重,膜表面形成了疏松的多孔层,反应气氛使膜表面晶体结构发生了较大改变,Sr容易从钙钛矿结构中析出并与CO2结合形成SrCO3,Sr的析出导致组成不平衡,促进了钙钛矿结构分解及其他物相的产生。%SrFe0.6Cu0.3Ti0.1O3-δ membrane was used to install a membrane reactor for partial oxidation of methane to syngas. The influences of temperature, space velocity and catalyst particle size on the reaction were studied, and the change of the phase structure of the membrane was analyzed. The interaction between the oxygen permeating process and the partial oxidation reaction caused different reaction performance in membrane reactor compared with fixed bed reactor. The crystallinity of both sides of the SrFe0.6Cu0.3Ti0.1O3-δ membrane declined significantly after the catalytic reaction. The decomposition of the perovskite structure and the formation of SrCO3 and other phases were found in the reaction-side surface of the membrane, along with the emergence of loose porous morphology.
    • 陈婷; 赵海雷; 谢志翔; 江伟辉
    • 摘要: The electrically conductive phase PrBaCo2O5+δ was coated on the surface of the ion conductive phase Ce0.8Sm0.2O2-δby a liquid coating strategy. After sintering, a novel Ce0.8Sm0.2O2-δ–PrBaCo2O5+δ (SDC–PBCO) dual-phase oxygen permeation membrane was achieved. The phase composition, the microstructure, the electrical conductivity and the oxygen permeability of the dual-phase membrane were studied by XRD, SEM, four-terminal DC method and vertical high-temperature gas permeation cell, respectively. The results indicate that the two phases have homogeneous distribution. On the premise of forming percolative network, compared with the conventional ceramic route, its electronic phase threshold volume percentage is decreased from 40 wt.% to 30 wt.%, resulting in the high permeability. The SDC–PBCO (60/40) and SDC–PBCO (70/30) membranes with 1 mm thickness exhibit very high oxygen permeation lfux, 2.22×10-7 and 2.46×10-7 mol•cm-2 min-1 at 945°C, respectively, which are 6% and 17% higher than the SDC–PBCO (60/40) prepared by the conventional ceramic route.%采用液相包覆法将电子导电相PrBaCo2O5+δ包覆在离子导电相Ce0.8Sm0.2O2-δ表面,烧结后得到Ce0.8Sm0.2O2-δ-PrBaCo2O5+δ(SDC-PBCO)双相透氧膜。通过XRD、SEM、四端引线法和透氧测试等手段分别考察了膜的相组成、显微形貌、电子电导率和氧渗透能力。实验结果表明,包覆法制备的膜材料双相分布均匀,电子相形成连续导通的阈值较直接固相混合法由40 wt.%降低至30 wt.%,因而提高了双相膜的透氧率。945°C时膜厚为1 mm的 SDC-PBCO (60/40)和SDC-PBCO (70/30)双相膜的透氧率分别为2.22×10-7 mol·cm-2·min-1和2.46×10-7 mol·cm-2·min-1,比固相混合法制备的SDC-PBCO (60/40)双相膜提高了6%和17%。
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