超级电容器电池正极铝合金箔及其连铸连轧工艺研究

超级电容器即电化学电容器，是近年来发展起来的一种新型储能元件，通过离子吸附（双电层电容）或氧化还原法拉第反应导致电荷在电极中的储存。本文主要介绍了一种新型的超级电容器电池用正极铝合金箔材料及其加工工艺。     

铝箔刻蚀与导电剂对双电层电容器性能的影响

以浓度为1 mol/L的Et4NBF4/AN作电解液,研究铝箔刻蚀时间与2种导电剂(石墨、导电炭黑)对双电层电容器等效串联电阻与电容性能的影响。结果表明,以石墨为导电剂,随刻蚀时间的增加,活性材料与铝箔的接触电阻减小,可使双层电容器的等效串联电阻减小,电极比电容增大。采用刻蚀80 s的铝箔为集流体,导电炭黑为导电剂可获得较小的等效串联电阻与较大的电极比电容,以此优化组合制得的双电层电容器的等效串联电阻为1.4Ω、比电容达到168.3 F/g。     

石墨烯基电极材料在超级电容器中的应用

随着能源消耗的日渐增长,寻找低成本、环保、寿命长的储能设备迫在眉睫。在超级电容器领域,石墨烯电极材料以其高比电容、优异倍率性能、良好导电性等优势而受到广泛关注。对石墨烯材料的制备方法、电化学性能及相关机制做了总结,目的是研究不同结构的石墨烯材料对超级电容器性能的影响,并找到性能较为优异的石墨烯基材料。最后分析了石墨烯基电极材料发展中存在的问题,并对其研究前景进行了展望。     

相关行业

动力型电容电池关键材料实现量产近日,科技部在北京连续组织召开了"十一五"国家科技支撑计划——"动力型超级电容电池系统的关键材料及器件研发及应用"和"超级电容器电极用多孔炭材料制备技术及设备研发"两项重点项目验收会。最终,专家组同意两项目通过验收。"动力型超级电容电池系统的关键材料及器件研发及应用"项目由湖南省科技厅负责组织实施,针对超级电容电池器件开发了磷酸铁锂符合纳米晶颗粒的正极材料、热解沥青包覆中间相炭微球负极材料和双功能电解液等关键材料,技术参数达到任务要求并实现了量产。项目建成了年产能1000万安时的生产线,开发了新型动力型超级电容电池,经组装电池组系统试车,已完成5.1万公里混合动力大巴和4.2万公里纯电动车试运行。"超级电容器电极用多孔炭材料制备     

镍基电极材料在超级电容器中的制备与应用

Ni因其价格低廉和对环境友好,被视为具有发展潜力的超级电容器电极材料之一;且它与其他电极材料复合可以有效阻止团聚反应的发生,能大大改善材料的电化学性能。近年来Ni的(氢)氧化物与碳材料、聚合物等复合制备新的电极材料已经成为储能领域研究的热点。介绍了Ni的化合物作为电极材料储能的机制以及在复合电极材料中的应用,综述了近年来国内外报道的各类镍基复合电极材料的研究进展,并对其今后的发展趋势进行了展望。     

动力型电容电池关键材料实现量产

近日，科技部在北京连续组织召开了“十一五”国家科技支撑计划——“动力型超级电容电池系统的关键材料及器件研发及应用”和“超级电容器电极用多孔炭材料制备技术及设备研发”两项重点项目验收会。最终，专家组同意两项目通过验收。“动力型超级电容电池系统的关键材料及器件研发及应用”项目由湖南省科技厅负责组织实施，针对超级电容电池器件开发了磷酸铁锂符合纳米晶颗粒的正极材料、热解沥青包覆中间相炭微球负极材料和双功能电解液等关键材料，     

石墨烯基电极材料应用于超级电容器的研究进展

石墨烯基电极材料因其优异的物理、化学性能在超级电容器中有着广泛的应用前景。文章综述了石墨烯基超级电容器材料的最新研究进展,包括三维石墨烯材料、石墨烯-导电聚合物材料、石墨烯-过渡金属氧化物材料、其它石墨烯基材料等。并对石墨烯基电极材料应用到超级电容器中存在的问题进行了探讨。     

恒压对万法级MnO2/C超级电容器性能影响研究

采用固相法制备了纳米棒状MnO2,用XRD和TEM对其结构与形貌进行了表征.以所制备的MnO2和活性碳为电极活性物质,组装成混合型超级电容器,并就恒压时间对其电容性能的影响进行了研究.结果表明,恒压时间越长,超级电容器的放电电容越大,自放电速率越低.16 A恒流充放电时,最佳恒压时间为10 min,此时超级电容器的电容为11006.1 F;50 A恒流充放电时,最佳恒压时间为5 min,此时超级电容器的电容为10 083.3 F.     

α-MnO2的机械化学法合成及其电容性质

以高锰酸钾与乙酸锰为原料,采用机械化学法制备MnO2.利用SEM、BET、XRD、交流阻抗法、循环伏安以及恒电流充放电对电极材料结构与性能表征,对充放电曲线求斜率分析.结果表明产物为弱结晶型α-MnO2,其比表面积为385.5 m2,平均孔径为3.4 nm.α-MnO2电化学电容器表现出法拉第电容与双电层电容的双重特征;随着循环次数增加,Mn3O4生成,交换电流密度从177 mA/g减少到69.8 mA/g,微分电容从2.40×10-1 F减少到1.91×10-3 F;电极过程主要受电极电位状态变量影响;电极最大比容量达到416 F/g,经过近500次循环后,比容量为220 F/g.     

石墨烯突破性应用之超级电容器

石墨烯具有特殊的二维碳原子结构,因此具有比表面积大、电导率高等特点,在超级电容器中可作为电极材料。本文主要综述了石墨烯超级电容器研究进展,包括超级电容器的原理、石墨烯的制备技术、石墨烯电极材料及复合、石墨烯超级电容器的生产及应用等。结合石墨烯的研发及产业化进展和现阶段新能源产业的发展和背景,阐述了石墨烯超级电容器有望成为石墨烯最具突破性的应用。     

铝电解陶瓷类惰性阳极材料的发展

对了铝电解对惰性阳极材料的要求进行了说明。介绍了多种对金属氧化物陶瓷材料和金属陶瓷材料为基体惰性阳极的实验室研究及工业试验情况，并阐述了对添加剂对阳极性能的影响。     

提高烧结系统处理二次物料能力的生产实践

讨论了冶炼厂提高二次物料处理能力的途径.通过加强烧结工艺的控制和提高ISP工艺,使二次物料的配入量提高至总精矿比例的30.97%左右,从而改善环境,降低成本.     

多孔材料孔径及孔径分布的测定方法

孔径及其分布显著影响着多孔体的透过性、渗透速率、过滤性等一系列性能。本文介绍多孔材料孔径及其分布的常用测定方法，包括断面直接观测法、气泡法、透过法、压汞法、气体吸附法、液．液法、悬浮液过滤法、X射线小角度散射法等，并对几种测量方法进行了比较。     

Application of Nanocrystalline LaNi5-type Hydrogen Absorbing Alloys in Ni-MHx Batteries

Duringlastyears ,interestinthestudyofnanos tructuredmaterialshasbeenincreasing .Thisisduetorecentadvancesinmaterials′synthesesandcharacteri zationtechniquesandtherealizationthatthesemateri alsexhibitmanyinterestingandunexpectedphysicalaswellaschemicalpropertieswithanumberofpoten tialtechnologicalapplications .Forexample ,hydrogenstoragenanomaterialsarethekeytothefutureofthestorageandbatteries/cellsindustries[1,2 ] .TheTiFe ,ZrV2 andLaNi5phasesarefamiliarmaterialswhichabsorblargequantitiesof…     

块体纳米软磁材料的研究现状

介绍了国内外块体纳米软磁材料的发展和应用情况。对块体纳米软磁材料的制备方法、纳米晶的形成机理、优异软磁性能的根源进行了探讨。阐述了未来块体纳米软磁材料的研究方向。     

Production of Welding Materials from Minerals of North-West Russia

Abstract

Potential welding materials from minerals of the Kola peninsula including mining byproducts, mineral concentrates and products of their processing, among them refractory and non-ferrous metals, ferroalloys (Fe-Nb, Fe-Ti, Fe-V, Fe-Cr, Fe-Ni, Fe-Si), titanium slag, titanium dioxide, sphene and many others are shown. A specific programme for creating the production of new welding materials has been drawn up. In order to achieve the highest degree of mineral and technogenic resources recovery in the region it is suggested that they be actively included into the welding materials production by developing original electrode coatings and welding fluxes. Such products may be of interest for both domestic and international markets.     

Overview of Potential and Existing Applications of Shape Memory Alloys in Bridges

Bridges are the backbones of transportation lines for modern cities. Damage to bridges could disrupt the flow of traffic and be disastrous for the communities they serve, especially when reconstruction and recovery activities are needed, such as after strong earthquakes and hurricanes. Recent earthquake and hurricane damage has exposed the vulnerability of existing bridges under strong ground motions and unexpected wave loads. In recent decades, several kinds of smart materials have been investigated to improve the performance of bridge structures during extreme events such as earthquakes and strong winds. Among these materials, shape memory alloys (SMAs) have exhibited great potential in enhancing the performance of bridge structures because of their unique properties, such as the shape memory effect and superelasticity effect. This paper, for the first time, systematically reviews and summarizes the applications of SMAs in bridge structures. The unique properties of SMAs are presented first, and several simplified one-dimensional constitutive material models of superelastic SMAs are introduced. Finally, applications of SMAs in five areas of bridge engineering are discussed.     

Bio-Based Composite Roof for Residential Construction

Bio-based composites are an innovative new class of materials that offer many advantages over traditional fiber reinforced composite materials, and may be suitable for use in light duty construction. A study was conducted to develop a bio-based composite roof structure, suitable for residential construction. First, to develop basic information about the flexural performance of the bio-composite, seven different beams were fabricated using a soybean oil-based resin and natural reinforcement (flax or recycled paper). The beams were tested in four-point bending to failure. Results showed that the beams made with recycled paper wrapped around the foam cores were the strongest and the stiffest of the beams tested. Using this composite design, a monolithic composite roof system was designed for residential construction. A scale model unit width beam from the roof was fabricated and tested. Tests included three- and four-point bending, a quasi-distributed load test, and test to failure. The model beam was shown to satisfy the design deflection criteria and had an ultimate strength 11 times greater than the design load. As this was a true scale model specimen, the results demonstrate that the prototype roof would also satisfy the design criteria for strength and stiffness, with similar factors of safety.     

计算机在材料科学中的应用

文章介绍了计算机网络技术在材料科学研究中的应用,阐述了材料科学研究领域中应用计算机的思路、方法、和原理.分析了计算机相关软件在新材料的设计、科学研究中的计算机模拟、材料的加工工艺及自动化控制等方面的广泛应用,探讨了计算机在材料科学研究领域中的具体应用,可供从事材料研究、开发和应用的工程技术人员参考.     

国外粉末冶金减摩材料的现状

概述了国外烧结减摩材料的研究现状,介绍了铜、铁和铝、轻金属钛以及易熔、高温、难熔金属基烧结减摩材料的性能与应用,简述了烧结减摩材料的新动向。