共查询到19条相似文献,搜索用时 62 毫秒
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世界超级电容器发展动态 总被引:2,自引:0,他引:2
超级电容器又称超大容量电容器、金电容、黄金电容、储能电容、法拉电容、电化学电容器或双电层电容器(英文名称为EDLc,即Electric DoubleLayer Capacitors),是靠极化电解液来存储电能的新型电化学装置。它是近十几年随着材料科学的突破而出现的新型功率型储能元件,其批量生产不过几年时间。 相似文献
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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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双电层电容器及其应用 总被引:1,自引:0,他引:1
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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大容量高储能密度电化学电容器的研究进展 总被引:9,自引:5,他引:4
综述了大容量、高储能密度的新型电容器——电化学电容器的原理、结构、特点及国内外的研究进展。目前 ,已有电化学电容器用于计算机备用电源、信号灯电源及需要大电流充放电的电源系统。 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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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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聚苯胺混杂型电化学电容器研究 总被引:4,自引:1,他引:3
采用聚苯胺在改性活性炭表面原位聚合方法,制备了聚苯胺活性炭复合物。研究了活性炭与苯胺在不同配比下制得的复合物的比容量,结果表明:当活性炭占复合材料的质量比为14.9%时,复合物的比容量为191.8F/g,比相同条件下制得聚苯胺的比容量提高了56%。以该复合物为电化学电容器的正极材料,以改性活性炭为其负极材料,电解液为6mol/L的氢氧化钠水溶液,组装了原型电化学电容器。该电容器的比能量可达8.7Wh/kg,比功率可达878W/kg。 相似文献
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