文献类型：期刊文献

英文题名：Bismuth oxide self-standing anodes with concomitant carbon dots welded graphene layer for enhanced performance supercapacitor-battery hybrid devices

作者：Wang, Wenqiang[1];Xiao, Yi[1];Li, Xingwei[1];Cheng, Qilin[1];Wang, Gengchao[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2019

卷号：371

起止页码：327

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20191506768731);WOS:【SCI-EXPANDED(收录号:WOS:000467042200037)】；

基金：We greatly appreciate the financial supports of International Science & Technology Cooperation Program of China (2016YFE0131200), National Natural Science Foundation of China (51673064), and Shanghai Municipality Research Project (15520720500).

语种：英文

外文关键词：Bismuth oxide; Graphene; Self-standing electrode; Nano-weld; Supercapacitor-battery hybrid

摘要：To meet the energy storage demand of developing electronic information technology, the supercapacitor-battery hybrid devices based on Bi2O3 have attracted much attention due to their superior energy storage characteristics. However, the poor cycling stability limits its application. Herein, through the nano-welding technique induced by the microwave thermal effect of graphene, the carbon nanotube film-supported Bi2O3 electrode with a graphene/carbon dots encapsulation structure is fabricated. The as-prepared composite electrode delivers a remarkable capacity of 1.90 mAh cm(-2) at 1 mA cm(-2) as well as high rate performance (1.57 mAh cm(-2) at 100 mA cm-2). Assembled device with above composite electrode as anode and the carbon nanotube loaded nickel cobalt as cathode exhibits a maximum energy density of 589.3 mu Wh cm(-2) (98.2 Wh kg(-1)) at power density of 0.8mWcm(-2) and maintain 288.3 mu Wh cm(-2) (48.1 Wh kg(-1)) at 57.1mWcm(-2). Most notably, by virtue of the flexible confinement of graphene, the device exhibits impressive cycle stability (80.1% capacity retention after 8000 cycles, similar to 4.5 times than that of a device assembled with a raw anode). This work opens a new pathway to the design and fabrication for high energy density and durable cyclic stability energy storage devices.