共查询到18条相似文献,搜索用时 125 毫秒
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电化学双电层电容器的研制 总被引:5,自引:1,他引:4
通过催化裂解法制备了碳纳米管并进一步制备了碳纳米管薄膜电极。基于该种材料的超电容器电极比容量达到36 F/g并表现出良好的功率特性。本文采用多种研究方法对基于该种材料的双电层电容器进行了详细的研究。 相似文献
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双电层电容器是具有电池和电容双重特性的新型电子元件,主要用于存储器备用电源、停机及关机备用电源、瞬间断电备用电源以及汽车能源再生系统。文中介绍了双电层电容器的设计原理以及它和电池及铝电解电容器的比较,并以哈尔滨大容电子有限公司生产的三种系列双电层电容器为例,对该产品及其应用作了介绍,最后给出了使用双电层电容器的注意事项。 相似文献
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双电层电容器的技术性能及其测量 总被引:1,自引:0,他引:1
《电子元件与材料》1990,(5)
本文概述了双电层电容器的主要技术性能。列出了无极性卷绕式双电层电容器和无极性电池式双电层电容器的性能指标。详细介绍了双电层电容器的静电容量、内阻(或ESR)和漏电流的测量方法。 相似文献
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锂离子电容器是新型的储能电源,它是双电层电容器(超级电容器)的衍生品,与双电层电容器相比,在许多性能上具有无可比拟的优点。文中简要介绍了锂离子电容器的结构和工作原理.性能,着重给出了它的应羽.市场前景和发展趋势, 相似文献
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微波加热法制备电极材料活性炭 总被引:2,自引:0,他引:2
以煤为原料,KOH为活化剂,采用微波辐射加热法和电阻炉加热法制备出双电层电容器用活性炭。对比研究了两种工艺下KOH用量、活化时间对活性炭比电容量的影响,考察了活性炭双电层电容器的充放电特性。结果显示:微波活化时,ζ(KOH∶煤)为3∶1,起电弧时间5min,比电容为283.67F/g;电阻炉活化时,ζ(KOH∶煤)为4∶1,保温时间为1h,比电容为235.55F/g。经过100次循环充放电后,微波法和电阻炉法所得的活性炭的比电容分别保持在98.10%和91.04%。 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2009,97(11):1837-1847
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Cheng‐Wei Huang Ching‐An Wu Sheng‐Shu Hou Ping‐Lin Kuo Chien‐Te Hsieh Hsisheng Teng 《Advanced functional materials》2012,22(22):4677-4685
The synthesis of a gelled polymer electrolyte (GPE) using poly(ethylene glycol) blending poly(acrylonitrile) (i.e., PAN‐b‐PEG‐b‐PAN) as a host, dimethyl formamide (DMF) as a plasticizer and LiClO4 as an electrolytic salt for electric double layer capacitors (EDLCs) is reported. The PAN‐b‐PEG‐b‐PAN copolymer in the GPE has a linear configuration for high ionic conductivity and excellent compatibility with carbon electrodes. When assembling the GPE in a carbon‐based symmetric EDLC, the copolymer network facilitates ion motion by reducing the equivalent series resistance and Warburg resistance of the capacitor. This symmetric cell has a capacitance value of 101 F g?1 at 0.125 A g?1 and can deliver an energy level of 11.5 Wh kg?1 at a high power of 10 000 W kg?1 over a voltage window of 2.1 V. This cell shows superior stability, with little decay of specific capacitance after 30 000 galvanostatic charge‐discharge cycles. The distinctive merit of the GPE film is its adjustable mechanical integrity, which makes the roll‐to‐roll assembly of GPE‐based EDLCs readily scalable to industrial levels. 相似文献
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Lu Wei Marta Sevilla Antonio B. Fuertes Robert Mokaya Gleb Yushin 《Advanced functional materials》2012,22(4):827-834
As electrical energy storage and delivery devices, carbon‐based electrical double‐layer capacitors (EDLCs) have attracted much attention for advancing the energy‐efficient economy. Conventional methods for activated carbon (AC) synthesis offer limited control of their surface area and porosity, which results in a typical specific capacitance of 70–120 F g?1 in commercial EDLCs based on organic electrolytes and ionic liquids (ILs). Additionally, typical ACs produced from natural precursors suffer from the significant variation of their properties, which is detrimental for EDLC use in automotive applications. A novel method for AC synthesis for EDLCs is proposed. This method is based on direct activation of synthetic polymers. The proposed procedure allowed us to produce ACs with ultrahigh specific surface area of up to 3432 m2 g?1 and volume of 0.5–4 nm pores up to 2.39 cm3 g?1. The application of the produced carbons in EDLCs based on IL electrolyte showed specific capacitance approaching 300 F g?1, which is unprecedented for carbon materials, and 5–8% performance improvement after 10 000 charge–discharge cycles at the very high current density of 10 A g?1. The remarkable characteristics of the produced materials and the capability of the fabricated EDLCs to operate safely in a wide electrochemical window at elevated temperatures, suggest that the proposed synthesis route offers excellent potential for large‐scale material production for EDLC use in electric vehicles and industrial applications. 相似文献
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Graphite oxide (GO) is shown to be an efficient heterogeneous catalyst for the polymerization of various olefin monomers, including n‐butyl vinyl ether, N‐vinylcarbazole, styrene, and sodium 4‐styrenesulfonate. The GO‐catalyzed polymerization of n‐butyl vinyl ether (0.1–5.0 wt% GO relative to monomer) proceeds rapidly under solvent‐free conditions and affords polymers with moderate number average molecular weights and broad polydispersities. Analysis of the carbon recovered at the conclusion of the polymerization reactions reveals that the material's catalytic activity is retained and multiple polymerization cycles can be performed without regenerating the catalyst. GO also catalyzes the polymerization of N‐vinylcarbazole and styrene, although only low molecular weight polymers are obtained. Sodium 4‐styrenesulfonate polymerizes in the presence of GO to afford poly(sodium 4‐styrenesulfonate) (PSS) composites. After thermal treatment, the composites can be fabricated into electrodes for use in electrochemical double layer capacitors (EDLCs). The devices display high specific capacitances (25–120 F g?1) and low equivalent series resistances (14–27 Ω). 相似文献
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《Power Electronics, IEEE Transactions on》2008,23(6):2755-2765