锂电池中水分含量 离子含量 电化学表征检测方案(卡氏水分测定)

Battery research ·Electrochemical characterization of batteries .Determination of water content ·Determination of anions and cations bvion chromatoqraphy Analytical instrumentation for battery research Considerable resources are currently being channeled intobattery research. The focus is on finding new materialsenabling better energy and power density as well as moreefficient energy storage. Electrochemical characterization of batteries，electrode materials and electrolytes The total power output of a battery is determined by theproperties of the electrolytes used and of the anode andcathode materials. Electrochemical methods are suitabletor， e.g.. ·determining current/voltage characteristics ·tests for polarity reversal (charging) of batteries ·characterizing aging effects using impedancespectroscopy ·recording discharge and charge cycles ·determining battery capacity · measuring the electrolyte resistance and charge transferresistance (electrode reaction) ·determining pulse power rating/high-current capability Metrohm Autolab instruments are ideal for the characterization and development of batterymaterials：·anode and cathode materials·separators， electrolytes， boundary layers·determination of iron(II) and iron(III) in lithium ironphosphate Determination ofwater content Lithium-ion battery must be completely free of water(concentration of H，0<20 ppm)， because water reactswith the conducting salt， e.g. LiPF， to form hydrofluoricacid. In general， mixtures of anhydrous， aprotic solventsand lithium salts are chosen as electrolytes. The watercontent can be determined reliably and precisely in， forexample， the samples listed below， using Karl-Fischercoulometry and the oven method： Determination of anions and cations In the development and optimization of lithium-ion bat-teries， one of the items of special interest is the contentof ions such as lithium， fluoride and hexafluorophosphatein the electrolyte or in eluates of different components. Using ion chromatography， it is possible to determine var-ious inorganic and organic anions and cations in parallelover a wide concentration range. Any sample prepara-tion steps that might be required (elution， dilution， filtra-tion) can be automated with the Metrohm Inline SamplePreparation (《MISP》) techniques. The following anionsand cations can be determined： ·fluoride， hexafluorophosphate， tetrafluoroborate andlithium in eluates of individual components such asanodes， cathodes and separator foils ·fluoride， hexafluorophosphate and lithium in electrolyteliquids 850 Professional IC plus 858 Professional Sample Processor：Metrohm offers a unique range of completely automated samplepreparation techniques for ion chromatography. www.metrohm.com ONZwmoo coo 应用介绍：大量的资源被引入电池研究，旨在寻找更好的新材料，具有更高的功率密度，能更有效地储存能量。电池研究的进步需要复杂的仪器，用于电池以及电池材料的生产和表征。瑞士万通为您提供锂电池研究的顶级的分析仪器，以及专业、一流、现场的服务。√电池、电极材料和电解质的电化学表征√电池原材料、隔膜、电解液的水分含量的测定√电解液或不同组件洗脱液中的离子含量