Supercapacitor-battery hybrid energy storage devices from an aqueous nitroxide radical active material  

作　　者：GUO Wei XIN Sen JI MengBo GUO YuGuo WAN LiJun 

机构地区：[1]Key Laboratory of Molecular Nanostructure and Nanotechnology,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]Beijing National Laboratory for Molecular Sciences,Beijing 100190,China [3]Graduate University of Chinese Academy of Sciences,Beijing 100064,China

出　　处：《Chinese Science Bulletin》2011年第23期2433-2436,共4页

基　　金：supported by the National Natural Science Foundation of China (50730005 and 20821003);the National Key Project on Basic Research (2011CB935700 and 2009CB930400);the Knowledge Innovation Program of the Chinese Academy of Sciences (KJCX2-YW-W26)

摘　　要：A hybrid electrochemical energy storage device was fabricated in aqueous NaOH with the 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) nitroxide radical as the active material, hydroquinone as the counter electrode active material, and an OH -selective separating membrane. The working principle of this device was investigated and it can be considered as a supercapacitor-battery hybrid energy storage system. Device performance was characterized by cyclic voltammetry and galvanostatic charge-discharge testing. When using multi-walled carbon nanotubes (MWCNTs) as electrode support materials, a high pseudo-capacitance of 1280 F g -1 was obtained with the TEMPO nitroxide radical as the active material at a 1 mV s -1 scan rate. This was ~33 times larger than the inherent double layer capacitance of MWCNTs. The electrode material and active material dissolved in solution could potentially be substituted with similar materials. This simple design provides a new approach for fabricating high performance supercapacitor-battery hybrid energy storage devices.A hybrid electrochemical energy storage device was fabricated in aqueous NaOH with the 2,2,6,6-tetramethyl-l-piperidinyloxy (TEMPO) nitroxide radical as the active material, hydroquinone as the counter electrode active material, and an OH--selective separating membrane. The working principle of this device was investigated and it can be considered as a supercapacitor-battery hybrid energy storage system. Device performance was characterized by cyclic voltammetry and galvanostatic charge-discharge testing. When using multi-walled carbon nanotubes (MWCNTs) as electrode support materials, a high pseudo-capacitance of 1280 Fg-1 was obtained with the TEMPO nitroxide radical as the active material at a 1 mV s-1 scan rate. This was -33 times larg- er than the inherent double layer capacitance of MWCNTs. The electrode material and active material dissolved in solution could potentially be substituted with similar materials. This simple design provides a new approach for fabricating high performance supercapacitor-battery hybrid energy storage devices.

关 键 词：氢氧化钠水溶液 电极活性物质 超级电容器 氮氧自由基 混合动力 存储设备 蓄电池 多壁碳纳米管 

分 类 号：TM53[电气工程—电器] TM912