Heterogeneous NiCo2O4@polypyrrole core/sheath nanowire arrays on Ni foam for high performance supercapacitors

Hu, Jing1; Li, Minchan1,2; Lv, Fucong1; Yang, Mingyang1,2; Tao, Pengpeng1,2; Tang, Yougen2; Liu, Hongtao2; Lu, Zhouguang1

2015-10-30

10.1016/j.jpowsour.2015.06.049

JOURNAL OF POWER SOURCES   影响因子和分区

0378-7753

1873-2755

A novel heterogeneous NiCo2O4@PPy core/sheath nanowire arrays are directly grown on Ni foam involving three facile steps, hydrothermal synthesis and calcination of NiCo2O4 nanowire arrays and subsequent in-situ oxidative polymerization of polypyrrole (PPy). When investigated as binder- and conductive additive-free electrodes for supercapacitors (SCs) in 6 M KOH, the NiCo2O4@PPy core/sheath nanowire arrays exhibit high areal capacitance of 3.49 F cm(-2) at a discharge current density of 5 mA cm(-2), which is almost 1.5 times as much as the pristine NiCo2O4 (2.30 F cm(-2)). More importantly, it can remain 3.31 F cm(-2) (94.8% retention) after 5000 cycles. The as-obtained electrode also displays excellent rate capability, whose areal capacitance can still remain 2.79 F cm(-2) while the discharge current density is increased to 50 mA cm(-2). The remarkable electrochemical performance is mainly attributed to the unique heterogeneous core/sheath nanowire-array architectures. (C) 2015 Elsevier B.V. All rights reserved.

NiCo2O4 Polypyrrole Heterogeneous nanomaterial Core/sheath nanowire Supercapacitors

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[21001117]

Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000358968400015

ELSEVIER SCIENCE BV

20152500963341

Capacitance ; Electric discharges ; Electrodes ; Hydrothermal synthesis ; Nanowires ; Nickel ; Polypyrroles ; Potassium hydroxide ; Supercapacitor

Nickel:548.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Organic Polymers:815.1.1 ; Solid State Physics:933

MATERIALS SCIENCE

Web of Science

1.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

Hu, Jing,Li, Minchan,Lv, Fucong,et al. Heterogeneous NiCo2O4@polypyrrole core/sheath nanowire arrays on Ni foam for high performance supercapacitors[J]. JOURNAL OF POWER SOURCES,2015,294:120-127.

Hu, Jing.,Li, Minchan.,Lv, Fucong.,Yang, Mingyang.,Tao, Pengpeng.,...&Lu, Zhouguang.(2015).Heterogeneous NiCo2O4@polypyrrole core/sheath nanowire arrays on Ni foam for high performance supercapacitors.JOURNAL OF POWER SOURCES,294,120-127.

Hu, Jing,et al."Heterogeneous NiCo2O4@polypyrrole core/sheath nanowire arrays on Ni foam for high performance supercapacitors".JOURNAL OF POWER SOURCES 294(2015):120-127.