Preparation of spiro-type quaternary ammonium salt via economical and efficient synthetic route as electrolyte for electric double-layer capacitor  

作　　者：周宏明 孙文佼 李荐 

机构地区：[1]School of Materials Science and Engineering Central South University [2]Hunan Zhengyuan Institute for Energy Storage Materials and Devices

出　　处：《Journal of Central South University》2015年第7期2435-2439,共5页中南大学学报（英文版）

基　　金：Project(51371198)supported by the National Natural Science Foundation of China

摘　　要：A spiro-type quaternary ammonium salt, spiro-(1,1′)-bipyrrolidinium tetrafluoroborate(SBP-BF4) was successfully prepared by an economical and efficient three-step process comprising the cyclization reaction of 1,4-dibromobutane and pyrrolidine, and subsequent ion exchange pathway with KOH followed by neutralization reaction via HBF4 in the system of ethanol solution. 1H NMR, 13 C NMR, FI-IR and XPS analyses showed the structure of SBP-BF4. The as-obtained SBP-BF4 was dissolved in AN and used as the electrolyte for supercapacitor. Electrochemical measurements demonstrate that, compared with commercial electrolyte TEMA-BF4/AN, SBP-BF4/AN exhibits high ionic conductivity, lower resistance and improved cycling performance, which is due to its smaller ion size and stable symmetry structure.A spiro-type quaternary ammonium salt, spiro-（1,1′）-bipyrrolidinium tetrafluoroborate（SBP-BF4） was successfully prepared by an economical and efficient three-step process comprising the cyclization reaction of 1,4-dibromobutane and pyrrolidine, and subsequent ion exchange pathway with KOH followed by neutralization reaction via HBF4 in the system of ethanol solution. 1H NMR, 13 C NMR, FI-IR and XPS analyses showed the structure of SBP-BF4. The as-obtained SBP-BF4 was dissolved in AN and used as the electrolyte for supercapacitor. Electrochemical measurements demonstrate that, compared with commercial electrolyte TEMA-BF4/AN, SBP-BF4/AN exhibits high ionic conductivity, lower resistance and improved cycling performance, which is due to its smaller ion size and stable symmetry structure.

关 键 词：spiro-type quaternary ammonium salt synthesis electrolyte electric double-layer capacitor 

分 类 号：TM53[电气工程—电器] O621.3[理学—有机化学]