2014/01/06 15:31
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双恒电位仪Bistat和旋转盘环电极RRDE最佳配置
进行燃料电池催化剂研究的仪器配置方案,荷兰IVIUM双恒电位仪Vertex.C.EIS和旋转还盘电极装置IVI.RRDE
能源/新能源
2020/06/11
Nanoparticle–Nanorod Core–Shell LiNi0.5Mn1.5O4 Spinel Cathodes with High Energy Density for Li-Ion Batteries
研究领域:锂离子电池电极材料 交流阻抗频率范围:500kHz - 0.01Hz Nanoparticle–nanorod core–shell LiNi0.5Mn1.5O4 spinel cathodes for Li-ion batteries were prepared using a hollow MnO2 precursor. The core and shell parts consisted of nanoparticle 100 nm and nanorod assemblies, respectively. The core–shell cathode exhibited greatly improved discharge capacities compared to nanoparticles prepared by a sol–gel method. The core–shell spinel exhibited discharge capacities of 121 and 100 mAh/g at 0.1C and 7C rates, respectively, whereas a spinel cathode prepared by a sol–gel method exhibited 99 and 80 mAh/g at those respective rates. In addition, the core–shell spinels demonstrated an energy density value that was enhanced by 52% to 1.6 Wh/cm3 compared to an analogous sample prepared by a sol–gel method, which showed a value of 0.9 Wh/cm3.
2014/01/06
Electrochemical Titanium Diboride TiB2 Synthesis from Fluoride Melts
Electrochemical Titanium Diboride TiB2 Synthesis from Fluoride Melts 研究领域:熔盐电解质 测量方法:循环伏安
2014/01/06
Air exposure effect on LiFePO4
研究领域:锂离子电池固体电解质 交流阻抗频率范围:200kHz - 10mHz The impact of ambient air exposure on LiFePO4/C nanocomposites has been investigated. A pristine sample was prepared without any exposure to ambient air through the whole process of synthesis and characterization and compared to the exposed samples. A small amount of lithium deintercalates from the olivine structure during exposure, a majority of which can be electrochemically reintercalated. This phenomenon changes the initial surface and bulk properties and should be taken into account when diminishing the particle size of LiFePO4. Keeping nanocomposites away from oxidative moisture atmosphere could be a solution to minimize these side reactions.
2014/01/06