文献类型：期刊文献

英文题名：The perfect matching between the low-cost Fe2O3 nanowire anode and the NiO nanoflake cathode significantly enhances the energy density of asymmetric supercapacitors

作者：Tang, Qianqiu[1];Wang, Wenqiang[1];Wang, Gengchao[1]

机构：[1]E 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：2015

卷号：3

期号：12

起止页码：6662

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20151100639860);WOS:【SCI-EXPANDED(收录号:WOS:000351227300055)】；

基金：This work was supported by the National Natural Science Foundation of China (51173042), the Shanghai Municipal Science and Technology Commission (12nm0504102), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Capacitance - Hematite - Nickel oxide - Supercapacitor - Anodes - Carbon fibers - Nanowires

摘要：The real-world applications of supercapacitors are hindered by their relatively low energy density compared with rechargeable batteries. Even with tremendous efforts in developing cathodes for aqueous asymmetric supercapacitors (AASCs), their supercapacitive performance is still severely restricted by the low specific capacitance of anodes which mostly consist of carbonaceous materials. We developed a novel low-cost anode of homogenous Fe2O3 nanowires grown on carbon fiber paper (CFP) that achieves a high specific capacitance of 908 F g(-1) at 2 A g(-1) and excellent rate performance (90% capacitance retention up to 10 A g(-1)) in a wide negative potential window of 0 to -1.35 V. Such an excellent supercapacitive performance makes it a perfect anode compared with other reported ones. Matching it with the NiO nanoflake cathode (1520 F g(-1) at 2 A g(-1) in 0-0.45 V) on CFP, an extremely high energy density of 105 W h kg(-1) is obtained at a power density of 1400 W kg(-1) and still retains 72.6 W h kg(-1) at 12 700 W kg(-1) for the AASCs, which is much superior to previously reported AASCs and even exceeding those of Ni-MH batteries.