文献类型：期刊文献

英文题名：Hybrid Supercapacitors Based on Interwoven CoO-NiO-ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

作者：Sun, Mingze[1];Wang, Jingmin[1];Xu, Mingsheng[1];Fang, Zhenbin[1];Jiang, Lei[2];Han, Qiang[2];Liu, Jichang[2];Yan, Manqing[1];Wang, Qiyang[1];Bi, Hong[1]

机构：[1]Anhui Univ, Sch Chem & Chem Engn, Hefei 230601, Anhui, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：5

期号：12

外文期刊名：ADVANCED ELECTRONIC MATERIALS

收录：;EI(收录号：20193707416998);WOS:【SCI-EXPANDED(收录号:WOS:000486794900001)】；

基金：This work was financed by the National Natural Science Foundation of China (Grant No. 51772001), the Anhui Provincial Key Scientific and Technological Project (No. 1604a0902178). All the co-authors thank the Key Laboratory of Environment-Friendly Polymer Materials of Anhui Province, Anhui University.

语种：英文

外文关键词：energy density; hybrid supercapacitors; nano-networks; porous graphene hydrogels; ternary metal oxides

摘要：Metal oxides-based supercapacitors have attracted much attention due to their easy fabrication and ultra-high theoretical specific capacitance. Here, a novel ternary metal oxide (CoO-NiO-ZnO, CNZO) in situ grown on Ni foam (CNZO@Ni foam) is prepared by one-pot hydrothermal synthesis and a subsequent annealing method. Compared with the corresponding binary and single metal oxides of CoO-ZnO, NiO-ZnO, CoO-NiO, CoO, NiO, and ZnO, this ternary metal oxide shows an ultra-high specific capacitance (areal capacitance) of 2115.5 F g(-1) (4.23 F cm(-2)) at a current density of 1 A g(-1) (2 mA cm(-2)). Further, a hybrid supercapacitor (HSC) is assembled by the CNZO@Ni foam//porous graphene hydrogel (PGH), which exhibits a wide potential window of 1.6 V, and a high energy density 53.67 Wh kg(-1) at a power density of 800 W kg(-1). Moreover, it also shows good cycling stability of 87.9% after 5000 charge/discharge cycles. This work provides an efficient and facile way to fabricate HSCs based on ternary metal oxide nano-networks and PGH with an aqueous electrolyte for safe and high-energy-density supercapacitors.