电容去离子法海水淡化单元内多物理场模拟及特性分析

针对电容去离子(CDI)海水淡化单元,建立了单元内吸、脱附过程的多物理场耦合模型,通过模拟分析了吸附及两种脱附方式(电压断开和电压反接)下,操作参数(工作电压、入口流速)和几何参数(电极厚度、流道间距)对CDI单元吸附脱盐及脱附再生过程的影响规律。结果表明,吸附效率随入口流速及流道间距的增大而减小,随多孔电极厚度及极板电压的增大而增大；吸附过程中,最小出口浓度随入口速度和流道间距的增大而增大,随工作电压增加而减小,与电极厚度无关；与脱附方式为电压断开相比,脱附方式为电压反接时,脱附完成所需时间较小。     

An ionic liquid supported CeO2 nanoparticles-carbon nanotubes composite-enhanced electrochemical DNA-based sensor for the detection of Pb2＋

An electrochemical sensor incorporating a signal enhancement for the determination of lead （II） ions （Pb2＋） was designed on the basis of the thrombin-binding aptamer （TBA） as a molecular recog- nition ...     

基于离子电流法的点火检测技术

<正>近年来,一些高级轿车发动机纷纷采用一种新的技术,即离子电流检测技术,如2005年款"奔驰"S600型的发动机、2006年款"宝马"M3、M5型的发动机及"绅宝"9000系列的B235型发动机等,均开始应用离子电流技术监测发动机失火与爆震现象,对点火系统     

Electrocatalytic oxidation and determination of dopamine at a carbon ionic liquid electrode modified with nafion-L-aspartic acid composite film

The electrocatalytic oxidation of dopamine (DA) was studied by electrochemical approaches at a carbon ionic liquid electrode (CILE) modified with the composite film of nafion and L-aspartic acid (NL-CILE). The CILE was fabricated by replacing non-conductive organic binders with a room-temperature hydrophobic ionic liquid, 1-butyl-3-methyl-imidazolium hexafluorophosphate. The composite film of NL was used as matrix to adsorb DA and catalyze the oxidation of DA in phosphate buffer solution (PBS). The electrochemical response of DA was investigated at the NL-CILE, the traditional carbon paste electrode (TCPE), CILE and the nafion modified CILE (N-CILE) in 0.1M PBS (pH 7.4), respectively. The results showed the superiority of NL-CILE to N-CILE, CILE and TCPE in terms of provision of higher sensitivity, faster electron transfer and better reversibility. Under optimum condition, the oxidation peak current was rectilinear with DA concentration range from 0.1μM to 0.1mM, with a detection limit of 0.03μM (S/N=3) by differential pulse voltammetry. The proposed method was applied to determine DA in samples successfully.     

日本新一代车用动力蓄电池的研发

日本新一代车用动力蓄电池包括全固体电解质二次电池、金属空气电池、多元阳离子蓄电池。日本大学和科研机构正在积极开发新一代车用蓄电池。     

大功率柴油机缸套减摩抗划伤技术研究

针对大功率柴油机缸套的划伤失效问题,研究了可以有效地提高缸套减摩抗划伤性能的新技术—离子氮碳共渗-离子渗硫复合处理技术.对用该技术制备的离子氮碳共渗-离子渗硫复合层在含硫添加剂润滑下进行的摩擦学性能研究结果表明,离子氮碳共渗-离子渗硫复合层与含硫添加剂产生协同作用,使复合渗表面的摩擦系数和体积磨损量都明显降低.柴油机台架试验及舰船实航试验表明,该技术可有效地避免柴油机缸套因发生划伤、磨损而失效,延长柴油机的使用寿命.     

锂聚合物电池PVdF电解质膜的研究

本文采用萃取-活化方法制备了由PVdF2801聚合物电解质膜,研究了聚合物电解质膜的机械强度、在 1M LiPF6-EC/DMC(质量比2:1)电解液中的吸液率、离子电导率、电化学稳定电位窗口等。结果表明30％ PVdF2801-20％发烟硅-50％DBP膜的吸液率、机械强度、离子电导率明显优于50％PVdF2801-50％DBP膜, 经过萃取浸电解液后30℃时其电导率为1．8×10-3S/cm,以不锈钢为工作电极时的电化学稳定电位窗口高达 5．1V,与高压阴极之间是相容的,能够满足实际应用的要求。     

聚合物电解质燃料电池中Nafion离子复合膜特性研究

研究了在ePTFE基材上吸附Nafion离子溶液制成的复合聚合物电解质膜的单电池特性,透气性,水合作用和水的迁移性能.复合膜的透气性比Nafion112高,但是并朱因此降低电池性能,同时可以看到电池性能在膜厚度降低时得到提高.复合膜的水合作用和水的迁移性能与基材上Nafion的担量及膜的厚度有关,随担量的增加而提高,随温度的变化速率大于Nafion112.