采用水介质由巯基丙酸与顺丁烯二酸酐反应得到羧乙基硫代丁二酸(CETSA),并采用IR、1 HNMR及13 C NMR进行了结构表征。探讨了阴离子交换树脂、阳离子交换树脂及硫酸对反应的催化作用,结果表明三种催化剂催化效果相近。测定了CETSA钙螯合...采用水介质由巯基丙酸与顺丁烯二酸酐反应得到羧乙基硫代丁二酸(CETSA),并采用IR、1 HNMR及13 C NMR进行了结构表征。探讨了阴离子交换树脂、阳离子交换树脂及硫酸对反应的催化作用,结果表明三种催化剂催化效果相近。测定了CETSA钙螯合值为3119mg/g,阻垢性能及缓蚀性能测试表明,当CETSA质量浓度大于1.0×10-5时,阻垢率大于99%,CETSA对金属镁、锌有明显的缓蚀作用。展开更多
The Li3V2（PO4）3/C composite cathode material was synthesized via sol-gel method using three different chelating agents （citric acid, salicylic acid and polyacrylic acid） at pH value of 3 or 7. The crystal structur...The Li3V2（PO4）3/C composite cathode material was synthesized via sol-gel method using three different chelating agents （citric acid, salicylic acid and polyacrylic acid） at pH value of 3 or 7. The crystal structure, morphology, specific surface area and electrochemical performance of the prepared samples were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, cyclic voltammetry （CV）, electrochemical impedance spectroscopy （EIS） and galvanostatic charge/discharge test. The results show that the effects of pH value on the performance of the prepared materials are greatly related to the chelating agents. With salicylic acid or polyacrylic acid as the chelating reagent, the structure, morphology and electrochemical performance of the samples are greatly influenced by the pH values. However, the structure of the materials with citric acid as the chelating agent does not change as pH value changes, and the materials own uniform particle size distribution and good electrochemical performance. It delivers an initial discharge capacity of 113.58 mA·h/g at 10C, remaining as high as 108.48 mA·h/g after 900 cycles, with a capacity retention of 95.51%.展开更多
文摘采用水介质由巯基丙酸与顺丁烯二酸酐反应得到羧乙基硫代丁二酸(CETSA),并采用IR、1 HNMR及13 C NMR进行了结构表征。探讨了阴离子交换树脂、阳离子交换树脂及硫酸对反应的催化作用,结果表明三种催化剂催化效果相近。测定了CETSA钙螯合值为3119mg/g,阻垢性能及缓蚀性能测试表明,当CETSA质量浓度大于1.0×10-5时,阻垢率大于99%,CETSA对金属镁、锌有明显的缓蚀作用。
基金Project(2007BAQ01055)supported by the National Key Technology R&D Program of ChinaProject(2011SCU11081)supported by the Sichuan University Funds for Young Scientists,ChinaProject(20120181120103)supported by Ph.D.Programs Foundation of the Ministry of Education of China
文摘The Li3V2（PO4）3/C composite cathode material was synthesized via sol-gel method using three different chelating agents （citric acid, salicylic acid and polyacrylic acid） at pH value of 3 or 7. The crystal structure, morphology, specific surface area and electrochemical performance of the prepared samples were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, cyclic voltammetry （CV）, electrochemical impedance spectroscopy （EIS） and galvanostatic charge/discharge test. The results show that the effects of pH value on the performance of the prepared materials are greatly related to the chelating agents. With salicylic acid or polyacrylic acid as the chelating reagent, the structure, morphology and electrochemical performance of the samples are greatly influenced by the pH values. However, the structure of the materials with citric acid as the chelating agent does not change as pH value changes, and the materials own uniform particle size distribution and good electrochemical performance. It delivers an initial discharge capacity of 113.58 mA·h/g at 10C, remaining as high as 108.48 mA·h/g after 900 cycles, with a capacity retention of 95.51%.
