双电层电容具体是怎么算的？请大神帮忙说明一下

杨柱仙 2017-09-02 15:49:23 412 浏览

参与评论

登录后参与评论

全部评论(1条)

endlesszjj 2017-09-03 00:00:00

超级电容器的类型比较多，按不同方式可以分为多种产品，以下作简单介绍。按原理分为双电层型超级电容器和赝电容型超级电容器：双电层型超级电容器，包括1.活性碳电极材料，采用了高比表面积的活性炭材料经过成型制备电极。2.碳纤维电极材料。

赞(15)

回复(0)

评论

评论
登录后参与评论

热门问答

双电层电容具体是怎么算的？请大神帮忙说明一下:

双电层电容具体是怎么算的:

双电层电容的分类:

双电层电容的物料:

现在的超级电容一般是电解电容还是双电层电容？:

请帮忙翻译一下，拜托: A new kind of TiO2 nanotube array/Ni(OH)2 (TiO2/Ni(OH)2) composite electrode with the storage ability of light energy was prepared by the deposition of Ni(OH)2 on the TiO2 nanotube array， which was synthesized by anodizing Ti foils in an HF... A new kind of TiO2 nanotube array/Ni(OH)2 (TiO2/Ni(OH)2) composite electrode with the storage ability of light energy was prepared by the deposition of Ni(OH)2 on the TiO2 nanotube array， which was synthesized by anodizing Ti foils in an HF aqueous solution. SEM and XRD results showed that Ni(OH)2 particles were well distributed on high density， well-ordered and uniform TiO2 nanotube arrays. The photoelectrochemical properties of the TiO2/Ni(OH)2 electrode were investigated in NaHCO3/NaOH buffer solution (pH 10) by means of UV–vis absorption spectra， cyclic voltammogram (CV) and photocurrent measurements. It was found that the TiO2/Ni(OH)2 electrode was highly sensitive to light and exhibited excellent photoelectrochromic properties. Upon UV irradiation， the photogenerated holes by TiO2 nanotube arrays can oxidize Ni(OH)2 to NiOOH， and thus the TiO2/Ni(OH)2 electrode can be photo-charged by light。1. Introduction Among many visible light photocatalysts， TiO2nanostructures have attracted much attention due to high photocatalytic activ-ity， nontoxicity， chemical stability and huge potential applications [1–6]. The TiO2 nanotube array is one of most attention-getting TiO2nanostructures because of large surface area and outstanding charge transport properties. TiO2nanotube arrays can be utilized in dye-sensitized solar cells[7–9]， photocatalysis and hydrogen gas sensing [10]. So far， a variety of methods have been attempted to prepare TiO2 nanotube arrays， such as hydrothermal synthe-sis[11]， Langmuir–Blodgett technique [12]， solution casting [13] and anodization technique[10，14]， etc. Among these methods， the anodization technique has many advantages of low cost， low tem-perature and easy to be scaled up to large-area preparation. Recently， anewkindof photo-functional systemwith theenergy storage ability has been developed by coupling TiO2 photosen-sitive electrode with energy storage materials. In Takahashi and Tatsuma’swork[15]，aTiO2/Ni(OH)2bilayer thinfilmwas suggested for the oxidative energy storage. In this case， a redox-activep-type semiconductor Ni(OH)2is coupled withn-type TiO2photocatalyst to formap–njunction，WhenTiO2is illuminatedby light， holesgen-erated at the junction are separated from excited electrons， trans-ported into the bulk of Ni(OH)2and oxidized Ni(OH)2to NiOOH. Therefore， the oxidative energy storage system was constructed 展开

石英石台面加工具体流程是什么？请网友帮忙了解一下:

请说明一下如何自制密度计:

请各位大虾帮忙翻译一下：: Withmorethan6millionnewmeasurementchannelssoldlastyear，NationalInstrumentsisaworldwideleaderinvirtualinstrumentation.Engineershaveusedvirtualinstrumentationformorethan25y... With more than 6 million new measurement channels sold last year， National Instruments is a worldwide leader in virtual instrumentation. Engineers have used virtual instrumentation for more than 25 years to bring the power of flexible software and PC technology to test， control， and design applications making accurate analog and digital measurements from DC to 2.7 GHz. This document provides an excellent introduction to virtual instrumentation as well as additional resources for continued research. What is virtual instrumentation? With virtual instrumentation， software based on user requirements defines general-purpose measurement and control hardware functionality. Virtual instrumentation combines mainstream commercial technologies， such as the PC， with flexible software and a wide variety of measurement and control hardware， so engineers and scientists can create user-defined systems that meet their exact application needs. With virtual instrumentation， engineers and scientists reduce development time， design higher quality products， and lower their design costs. 展开

请高手帮忙翻译一下 3: 2.2.1. Physical and physicochemical characterization The particle size distribution of the Ch-zeolite was determined using a laser diffraction equipment (CILASk 1064) and standard wet sieving (Mesh Tylerk series). Scanning electron mic... 2.2.1. Physical and physicochemical characterization The particle size distribution of the Ch-zeolite was determined using a laser diffraction equipment (CILASk 1064) and standard wet sieving (Mesh Tylerk series). Scanning electron microscopy (SEM-PHILIPSk XL20) was used for photomicrographs as well as to analyse the Ch-zeolite composition (Energy Dispersion X-ray， EDX). The sample was initially placed in a vacuum chamber for coating with a thin layer (few nanometers) of gold (Au). The specific surface area of the material was measured by the methylene blue technique and by nitrogen gas adsorption methods， with the latter also providing information about particle porosity. In the methylene blue adsorption method， aqueous solutions (50 ml) of methylene blue (100 mg l 1) were agitated using an orbital shaker (Marconik) for an hour at room temperature in the presence of different quantities of the Ch-zeolite (0.05–0.3 g). The suspensions were then allowed to settle for 23 h and the resulting supernatants were centrifuged at 5000 rpm before the analysis of the residual methylene blue concentration. Results obtained correspond to averaged values of three different experiments. The specific surface area was evaluated by the Langmuir model， assuming the formation， at high concentrations， of a dye monolayer and 1.08 nm2 molecule 1， for the cross-sectional area (Van den Hul and Lyklema， 1968). The Ch-zeolite specific surface area was evaluated by the nitrogen gas adsorption method， using automated equipment (Autosorb 1-Quantachrome Instrumentsk)， employing multipoint BET isotherm adsorption data fitting. Also from these data， the porosity of the material was evaluated through parameters such as volume of total pores (d < 206 nm)， surface area and volume of micropores (d < 2 nm; Micropore Analysis Method). Zeta potential measurements for the natural and ammonia loaded zeolite， as a function of medium pH， were determined using a Zeta Plusk equipment (Brookhaven Instruments). Suspensions (0.01% v/v) of the Ch-zeolite， previously sieved below 37 Am (400 Mesh Tylerk)， in a 10 3 mol l 1 solution of KNO3 were used and the medium pH was controlled with the addition of HNO3 (pH< 7) and KOH (pH>7)， separately. For the Ch-zeolite saturated with ammonia， suspensions of the material were prepared by the same procedure， except that the sample was loaded with 100 mg NH3–N l 1 of ammonia. 展开

请专家帮忙翻译一下，谢谢！: 粒度检测方法与优缺点比较粉末粒度分布的测量方法经过百余年的发展，据统计至少已经发展了上百种，但随着科技的发展，有些方法被逐步淘汰，有些方法得到了改进和发展（如激光散射法、动态光散射等），并在生产、科研中得到了广泛的应用，现在普遍使用的测量... 粒度检测方法与优缺点比较粉末粒度分布的测量方法经过百余年的发展，据统计至少已经发展了上百种，但随着科技的发展，有些方法被逐步淘汰，有些方法得到了改进和发展（如激光散射法、动态光散射等），并在生产、科研中得到了广泛的应用，现在普遍使用的测量方法有筛分法、显微图像法、光透沉降法、激光散射（衍射）法等几种，下面简单介绍几种常用的粒度测量方法。 ▲ 筛分法是一种具有很长历史的粒度测定方法，筛分法粒度测量是利用一组筛孔大小不同的标准筛将粉末进行筛分，然后对每个筛上样品分别进行称重，进而得到以质量为量纲的粒度分布数据，并可由分布结果计算出如Dv50等其它参数。筛分滶要特点是测量成本低廉，操作简单，但存在着如重复性差，测量时间较长，不能对5um以下的颗粒进行测量等缺点。 ▲显微图像分析法利用光学或电子显微镜及计算机图像识别技术对颗粒粒度及粒度分布，颗粒形貌进行测量，分析的方法。这种方法不仅能够测量粒度分布而且能够直接观察到颗粒的形状，是目前唯yi的一种可目视的直观测试方法，这种特点也是其它粒度测量仪器所不具备。这种方法的优点是直观、简便、费用低，缺点是由于取样量很少，为使测量结果代表性，必须增加待测颗粒的个数（一般认为测量颗粒的个数应在1000个以上），这就相应啬了测量时间，及测试人员的工作强度，但由于能够对颗粒形貌（如长径比等）进行测量，目前也有广泛应用。 ▲光透沉降法沉降法粒度测试的理论基础是斯托克司定律和比尔定律。前者给出颗粒沉降速度与粒径的关系，后者阐明光透过率与粒径重量的关系。可简单的描述为：在沉降液中，有若干相同比重的颗粒，如果同一时刻，从同一位置开始下降，则不同直径的颗粒到达测量区的时间是不同的，根据颗粒到达测量区的时间，及光强的强弱，就可以计算出颗粒的粒径，及相应粒径的颗粒在颗粒群中占有的比例。采用此种原理的测量仪器有比较长的使用历史，但随着科技的发展和测量手段的进步，此方法的缺点也日益突出，如测量时间长，重复性误差大等。 ▲ 激光散射法颗粒测量仪器是以富朗和菲衍射（Fraunhofer diffraction）和米氏散射（Mie scattering）为理论基础。此理论可以简单理解为沿直线传播的平行激光束，在传播过程中遇到颗粒的遮挡后，传播方向发生了改变（即发生了衍射和散射现象），并且大颗粒使激光改变的角度小，小颗粒改变大。（实际上是由于颗粒的遮挡在无限远处形成了一个爱里斑，爱里斑87%的能量集中在ZX亮环，且颗粒直径越大，ZX环越小，颗粒直径越小ZX亮环越大）。如果能在不同角度上接收光能，对于相应的的角度，其光能是对应直径的颗粒集合发生衍射（散射）造成的，相应其他角度上光能的强弱也就反应了对应直径颗粒在整个颗粒集合中占有的比例。 ▲ 采用激光粒度测量仪器相对于光透沉降粒度测量仪器具有很多优点： 1. 原理先进，并且由于测试过程中没有需要预先设定的参数（如样品比重、介质黏度、环境温度等），及在测量过程中随时改变的条件，因此测量结果准确、可靠。 2. 测量速度快，测试时间与样品粒度分布无关，典型测试过程一般小于一分钟； 3. 每次测试，多次对样品进行扫描，测试结果重复性好； 4. 进样方式种类多，可适用于各种类样品。展开

请专家帮忙分析一下尿常规: 患者信息：女 50岁天津南开区病情描述(发病时间、主要症状等)：白细胞 97.5↑ 红细胞36.7↑ 上皮细胞 28.2 管型 0.53 白细胞(高倍视野) 17.6↑ 红细胞(高倍视野)6.6↑ 上皮细胞 (高倍视野)5.1 管型 (低倍视野) 0.53 病理管型0.53 结晶数量0 小圆... 患者信息：女 50岁天津南开区病情描述(发病时间、主要症状等)：白细胞 97.5↑ 红细胞36.7↑ 上皮细胞 28.2 管型 0.53 白细胞(高倍视野) 17.6↑ 红细胞(高倍视野)6.6↑ 上皮细胞 (高倍视野)5.1 管型 (低倍视野) 0.53 病理管型0.53 结晶数量0 小圆上皮细胞数量 1.7 类酵母细胞数量0 尿胆原 Normal 胆红素 NEG 酮体NEG 隐血NEG 蛋白质NEG 亚硝酸盐NEG 白细胞酯酶+- Ca15 葡萄糖NEG 比重1.020 PH酸碱度 6.5 维生素C 0 微白蛋白NEG 展开

为什么有的电机要装双电容:

求大神给个，红外测温方面的计算公式！希望具体点，能说明一下:

请帮忙分析一下这个开关电源的原理。

请帮忙分析一下原理图电源部分: 电源部分有VBTN（12V转5V芯片的输出，5V/1.）和VUSB（USB供电，5V/500mA）两种电源，如果两种电源同时存在的话，会不会因为其中一个电源内阻小，电流倒灌导致电源烧坏？如果不会烧坏电源的话，麻烦讲解一下为什么。另外，两个5V电源叠加后输出的电源还是5V吗... 电源部分有VBTN（12V转5V芯片的输出，5V/1.）和VUSB（USB供电，5V/500mA）两种电源，如果两种电源同时存在的话，会不会因为其中一个电源内阻小，电流倒灌导致电源烧坏？如果不会烧坏电源的话，麻烦讲解一下为什么。另外，两个5V电源叠加后输出的电源还是5V吗？电流是两个电源的输出电流之和吗？展开

超级电容器的电压由什么决定（双电层:

跪求物理化学的问题，请大神帮忙，急需，物理化学: 马上要考试了，各位大神赶紧帮忙吧，物理化学的，希望回答可以很专业，然后如果回答好的话我会把分追加到一百五，急呀～很急～一、降低反应温度有利于提高合成氨反应的平衡转化率，但工业中常用723-K823K的较高温度，为什么？二、用热力学原理说明在零下十度... 马上要考试了，各位大神赶紧帮忙吧，物理化学的，希望回答可以很专业，然后如果回答好的话我会把分追加到一百五，急呀～很急～一、降低反应温度有利于提高合成氨反应的平衡转化率，但工业中常用723-K823K的较高温度，为什么？二、用热力学原理说明在零下十度标准压力下，冰比水稳定三、强、弱电解质在稀释时候电导率和摩尔电导率分别有什么变化？四、在相图上，体系在哪个点时候只有一相？为什么五、为什么警示灯用红色，用物理化学知识解释六、多孔性物质如碳酸钙，常用来做干燥剂，适用物理化学知识解释七、为什么气泡、液滴、肥皂泡呈球形，本质是什么？八、为什么说在恒温、恒压下，气体在固体表面上的吸附过程为当热过程九、将放有油和水的容器剧烈震荡使完全混合后静置，会有什么现象？为什么？将一盆水放在室内或将同体积的水在室内雾化，哪一种情况人觉得更凉爽，为什么？十、能不能简单叙述一下恒沸物是怎么回事，还有蒸馏精溜的我也不懂展开

大神帮忙:

加急~！请帮忙分析一下我的血细胞报告: 女16岁希望能帮忙逐项分析一下，谢谢啦。。WBC14.8x109/LRBC4.92x1012/LHCB157g/LPTL299x109/LS0.57L0.27M0.05异L0.12... 女 16岁希望能帮忙逐项分析一下，谢谢啦。。 WBC 14.8x10 9/L RBC 4.92x10 12/L HCB 157g/L PTL 299x10 9/L S 0.57 L 0.27 M 0.05 异L 0.12 展开

5月突出贡献榜

推荐主页

双电层电容具体是怎么算的？请大神帮忙说明一下

联系我们

关注我们