Hierarchical porous NiCo2O4 nanomaterials with excellent cycling behavior for electrochemical capacitors via a hard-templating route

被引：26

作者：

Ding, Rui ^{[1
,2
,3
]}

Qi, Li ^{[1
]}

Jia, Mingjun ^{[3
]}

Wang, Hongyu ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

[3] Jilin Univ, Coll Chem, State Key Lab Theoret & Computat Chem, Changchun 130023, Peoples R China

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2012年 / 42卷 / 12期

关键词：

Nickel cobaltite (NiCo2O4); Electrochemical capacitors; Cycling behavior; Hierarchical porous; Hard-templating; MESOPOROUS NICKEL-OXIDE; RAY PHOTOELECTRON-SPECTROSCOPY; HYDROUS-RUTHENIUM-OXIDE; HYDROTHERMAL SYNTHESIS; CONTROLLABLE SYNTHESIS; CARBON NANOTUBES; ENERGY-STORAGE; SUPERCAPACITORS; SPINEL; NANOSTRUCTURES;

D O I：

10.1007/s10800-012-0494-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Hierarchical porous nickel cobaltite (NiCo2O4) nanomaterials were synthesized via a hard-templating route. The obtained materials consist of nanostructured cubic NiCo2O4 spinels and a spot of cubic NiO nanoparticles, and the materials display a typical hierarchical porous structure. The NiCo2O4 electrode displays quasireversible dynamics characteristics, mainly Faradaic capacitance behavior and capacitance relaxation feature. The NiCo2O4 electrode exhibits an excellent long cycling behavior with no capacitance decays during 5,000 cycles at a current density of 2 A g(-1) in 1 M KOH electrolytes, and the NiCo2O4 electrode exhibits both high power and energy performances even after 5,000 cycles with respective value of 1,758 W kg(-1) and 8.3 W h kg(-1) in 1 M KOH electrolytes, indicating that the NiCo2O4 nanomaterials are promising candidates for electrochemical capacitors.

引用

页码：1033 / 1043

页数：11

共 56 条

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