Facile and low-cost fabrication of nanostructured NiCo2O4 spinel with high specific capacitance and excellent cycle stability

被引：105

作者：

Wang, Changhui ^{[1
,2
]}

Zhang, Xiong ^{[1
,2
]}

Zhang, Dacheng ^{[1
,2
]}

Yao, Chao ^{[1
,2
]}

Ma, Yanwei ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2012年 / 63卷

基金：

中国国家自然科学基金;

关键词：

NiCo2O4; Ethylene glycol; Coprecipitation; Calcination time; Electrochemical capacitor; LAYERED DOUBLE HYDROXIDES; OXIDE; PERFORMANCE; NANOPARTICLES; BEHAVIOR; ELECTRODE; SYSTEMS; AREA; NI;

D O I：

10.1016/j.electacta.2011.12.090

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nanostructured NiCo2O4 spinel was fabricated with a facile, low-cost coprecipitation process. The ethylene glycol was applied to serve as a stabilizer to govern over the nucleation, growth, and agglomeration processes. The influence of the calcination time was also studied on the coprecipitation reaction. Both the reaction conditions have statistically significant effects on the size distribution, crystallinity, electronic conductivity and the electrochemical performances of the products. The optimized, 5-10 nm NiCo2O4 spinel, calcinated at 375 degrees C for 8h, had excellent crystallinity and electric conductivity. It showed a superior-specific capacitance of 671 Fg(-1) at a current density of 1 A g(-1). The delay in the specific capacitance was insignificant, after a 7000-cycle test, revealing the high stability of the product. The simplicity and practicability of the modified coprecipitation process may facilitate the successful commercial applications in electrochemical capacitors for nanostructured NiCo2O4 spinel. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：220 / 227

页数：8

共 39 条

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