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离子液体以其高稳定性、高导电性等特有的优点成为众多领域的研究热点。本文综述了离子液体聚合物电解质在染料敏化太阳能电池中的应用,详细讨论了离子液体聚合物电解质的复合方法,并比较了复合前后电解质的电导率情况;评论了复合离子液体聚合物电解质在多方面的应用,并对其发展方向进行了展望。 相似文献
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离子液体以其高稳定性、高导电性等特有的优点成为众多领域的研究热点。本文综述了离子液体聚合物电解质在染料敏化太阳能电池中的应用,详细讨论了离子液体聚合物电解质的复合方法,并比较了复合前后电解质的电导率情况;评论了复合离子液体聚合物电解质在多方面的应用,并对其发展方向进行了展望。 相似文献
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以四甲基乙二胺、五甲基二乙烯三胺、1,3-丙烷磺内酯、Keggin型杂多酸磷钨酸、硅钨酸为原料,经季铵化、酸化两步原子经济反应,合成了两种多磺酸基、多杂多酸阴离子官能化杂多酸离子杂化体8S3Si IH和6S2PIH。8S3Si IH、6S2PIH作为非均相催化剂,研究了柠檬酸与正丁醇的Fischer酯化反应,确定了最佳反应条件:n(酸)∶n(醇)∶n(杂化体)=1∶4∶0.001 5,无溶剂回流分水反应4 h,柠檬酸三丁酯产率分别为97.8%和95.7%。杂化体经过滤、乙醚洗涤、真空干燥即可再生循环使用,循环使用5次的催化活性保持不变。 相似文献
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现有工业上应用的Hall-Héroult法电解铝工艺存在高能耗和大气污染等问题。为此,文中分析评述了离子液体作为电解质解决上述问题的可行性。从离子液体电解铝技术的特点、研究现状与应用前景等方面,具体讨论了离子液体作为电解质在电解铝技术中应用存在的问题以及其未来发展方向。现有的离子液体电解铝技术可以实现低温下电解铝反应,反应能耗接近理论最低值,没有温室气体CO_2或有毒有害气体CO和HF等的排放,称得上是一种理想的绿色环保电解铝技术。但是,氯铝酸型离子液体对水和空气较为敏感,导致电解铝系统较为复杂;而非氯铝酸型离子液体的高黏度和对电解原料氯化铝/氧化铝的低溶解度,使得其应用受到限制。因此,未来应继续开展对离子液体电解液体系的深入研究,特别是开发适用于工业电解铝应用的离子液体电解质。 相似文献
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通过研究[C4mim]Br、[C7mim]Br、[C8mim]Br、[BPy]Br共4种离子液体对白炭黑、膨润土、高岭土、硅藻土、珍珠岩(深、浅色)共6种不同无机材料进行改性,并对改性前后的无机材料进行了FT-IR、TG和氮气吸附-脱附比表面积分析。应用改性后的无机材料与橡胶混炼制胶,测定其导热系数。结果表明,无机材料经离子液体改性后均比未改性的导热系数有所提高,其中,[C4mim]Br改性无机材料的导热系数提高幅度最大,[C4mim]Br改性的高岭土的导热系数高达0.389W/(m?K),与改性前的导热系数相比提高了89.76%。 相似文献
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邓友全 《精细化工原料及中间体》2007,(10):3-4
离子液体,简单的说就是全部由有机阳离子和有机或无机阴离子组成的有机液体盐。其中,高温融盐融熔氯化钠熔点>800℃,需高温,有强腐蚀,难于操作和应用;室温离子液体熔点<100℃,弱腐蚀性,无污染,易操作。 相似文献
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《Ceramics International》2022,48(13):18949-18955
The application of solid-state electrolytes endows the distinctive features of high safety and high energy density for lithium (Li) metal batteries. Among all kinds of solid-state electrolytes, garnet-type Li7La3Zr2O12 (LLZO) with high Young's modulus is a promising candidate. Nevertheless, Li metal can still grow inside LLZO and lead to short circuit. But it is difficult to determine the failure mechanism caused by Li dendrite due to the opacity of the common LLZO. Herein, a transparent Li6.4La3Zr1.4Ta0.6O12 (LLZTO) electrolyte is fabricated for the observation of Li growth inside the electrolyte directly. The factor that influences the transparency of LLZTO is investigated thoroughly, which is crucial for studying the behavior of Li metal during the plating process inside LLZTO. Results demonstrate that the amount of residual Li-containing compound at grain boundaries is the dominant factor influencing the transparency of LLZTO. The formation of Li filament and its growth process inside transparent LLZTO are also observed directly. 相似文献
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Naoko Fujiwara Kazuaki YasudaTsutomu Ioroi Zyun SiromaYoshinori Miyazaki 《Electrochimica acta》2002,47(25):4079-4084
The ‘impregnation-reduction method’ has been investigated as a tool for the preparation of a direct methanol fuel cell (DMFC) anode. In this method, PtRu electrocatalysts were directly bonded onto a polymer electrolyte membrane by the chemical reduction of a mixture of Pt and Ru complexes impregnated in the membrane. The deposited PtRu particles were embedded in the 3-4 μm region of the membrane surface to form a porous and hydrophilic layer. The PtRu layers turned out to be applicable to the DMFC anode, despite their small active surface areas compared to PtRu nanoparticles used in the conventional method. Approximately, 3 mg cm−2 of the PtRu layer exhibited better catalyst utilization and facilitated the release of evolving CO2. This preparation technique is attractive for the application of various solid polymer electrolyte materials with low heat-resistance or various shapes, etc. 相似文献
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摘要:以聚己二酸-1,4-丁二醇酯二醇( PBA) 、六亚甲基二异氰酸酯( HDI)和阻燃剂N,N阻双(2(羟乙基)胺基亚甲基磷酸二乙酯( FCR-6)为主要原料合成阻燃聚氨酯(TPUP),将阻燃聚氨酯与锂盐复合得到阻燃聚氨酯基固态聚合物电解质。采用红外光谱、热重分析、锥形量热、力学测试、电化学窗口、电导率和电池的充放电性能测试等对阻燃聚氨酯基固态聚合物电解质进行了表征和性能测试。研究表明,TPUP具有良好阻燃性能,制备的阻燃电解质TPUP25%Li综合性能最佳,且拉伸强度达到2.09MPa,80℃时离子电导率为3.09M10-4 S/cm,以阻燃电解质组装的全固态锂电池,在80℃时0.2C电流密度下放电容量达到159mA?h/g。 相似文献
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电解质NRTL模型的研究进展及应用 总被引:1,自引:0,他引:1
电解质NRTL模型是重要的热力学局部组成模型。本文阐述了电解质NRTL模型的研究进展过程,包括模型的提出、修正、改进和扩展,同时指出了不同模型的适用范围。介绍了模型在各种复杂电解质溶液体系关联计算中的应用,可以为一些工业生产过程的模拟、设计和优化提供理论指导。电解质NRTL模型的主要优势是适用的温度和浓度范围宽,不需二元以上高阶参数;但模型自身也存在缺陷,如参数的回归工作量大、在溶液体系临界点处的预测精度较差等,故模型仍需进一步完善。 相似文献
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Shi Chen Zhi Liang Huang Chang Lian Chen Mian Lu Chang Sheng Wu Yuan Jiang 《International Journal of Applied Ceramic Technology》2021,18(3):605-614
Vanadium doped La9.33Si6−xVxO26+0.5x (x = 0.5, 1.0, 1.5) (LSVO) electrolyte powder was prepared by combustion method at 600°C for 5-7 min. The powder was sintered at 1500°C for 3 hours to prepare LSVO ceramics. XPS, IR, XRD, and EIS analysis show that V5+ doping replaces Si4+ in [SiO4] to form [Si(V)O4] tetrahedron. With the increase in x, the lattice volume increase. When x = 2.0, the LaVO4 phase was formed, indicating that the limit doping amount of V5+ replacing Si4+ is x ≤ 1.5. The conductivity of LSVO increases significantly with the increase in x (x ≤ 1.0), which attributed to the defect reaction caused by V5+ doping. The addition of the interstitial oxygen Oi* in 63 channels and the increase of lattice volume leads to increased conductivity. When x = 1.0, the highest conductivity is 1.46 × 10−2 S·cm−1 (800°C). The doping enhancement conductivity mechanism is the Interstitial oxygen defect-Lattice volume composite enhancement mechanism. 相似文献
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Manjeet Singh Vivek K. Singh Karan Surana B. Bhattacharya Pramod K. Singh Hee-Woo Rhee 《Journal of Industrial and Engineering Chemistry》2013,19(3):819-822
A solid polymer electrolyte consisting of poly vinylpyrrolidone (PVP) and potassium iodide (KI) were developed, characterized for possible application in dye sensitized solar cell (DSSC) as an electrolyte. Complex impedance spectroscopy revealed the enhancement in electrical conductivity (σ) by salt doping and a conductivity maximum was obtained at 30 wt% KI concentration. Dielectric phenomena also support the σ data. Fourier transform infrared spectroscopy (FTIR) confirmed the composite nature of polymer electrolyte film. Using maximum electrical conductivity film we have fabricated a DSSC which shows 0.14% efficiency at 1 sun condition. 相似文献
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分析了有机电解液在锂离子电池中的作用以及锂离子电池对有机电解液的要求,介绍了有机电解液的制备方法以及制备过程中的控制技术,根据锂离子电池的发展方向,提出了提高有机电解液质量及应用性能的途径。 相似文献
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以聚碳酸酯二元醇(PCDL)和六亚甲基二异氰酸酯(HDI)为主要原料,1,4-丁二醇(BDO)和荧光小分子二元醇N,N-二羟乙基苯胺-β-三联吡啶(TPPDA)为扩链剂,制备了一种热塑性荧光聚氨酯,其与双三氟甲烷磺酰亚胺锂(LiTFSI)共混制备了荧光聚氨酯电解质(FPU)。采用傅里叶变换红外光谱仪、荧光光谱仪、拉伸测试仪、同步热分析仪、电化学工作站和电池测试仪对制备的电解质进行了结构、光学性能、力学性能、热稳定性能和电化学性能的测试与分析。结果表明,随着膜内LiTFSI质量分数的增加,荧光强度增大;LiTFSI质量分数为30%制备的荧光聚氨酯电解质膜(FPU-3)拉伸强度达到4.5 MPa,电导率达到1.03×10~(–4) S/cm;采用LiTFSI质量分数为30%的荧光聚氨酯电解质膜与磷酸铁锂正极和锂金属负极组装的全固态电池表现出良好的倍率与循环性能,在80℃、0.2 C和1.0 C倍率下首次放电比容量分别达到164和112 mA·h/g。 相似文献