Ni-doped cobalt hexacyanoferrate microcubes as battery-type electrodes for aqueous electrolyte-based electrochemical supercapacitors

被引：64

作者：

Qiu, Yun ^{[1
]}

Lin, Ying ^{[1
]}

Yang, Haibo ^{[1
]}

Wang, Lei ^{[1
]}

机构：

[1] Shaanxi Univ Sci & Technol, Shaanxi Key Lab Green Preparat & Functionalizat I, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 806卷

基金：

中国国家自然科学基金;

关键词：

Cobalt hexacyanoferrate; Supercapacitor; Nickel ions; Microcubes; PRUSSIAN-BLUE-ANALOG; OXYGEN EVOLUTION REACTION; ENERGY-STORAGE; SUPERIOR PERFORMANCE; CARBON NANOTUBES; NANOCUBES; OXIDE; CO; CAPACITANCE; FABRICATION;

D O I：

10.1016/j.jallcom.2019.07.253

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ni-doped cobalt hexacyanoferrate (NiCoHCF) microcubes were fabricated through co-precipitation method at room temperature. The doping of nickel ions shows positive effect on the nanostructure and electrochemical properties of the cobalt hexacyanoferrate (CoHCF). The results of scanning electron microscopy (SEM) and X-ray diffractometer (XRD) indicate that the doping of nickel ions can reduce the grain size of CoHCF microcubes. The as-synthesized NiCoHCF microcubes are studied as electrode materials for supercapacitor showing a high specific capacitance of 129.4 mAh g(-1) (466 F g(-1)) at a scan rate of 5 mV s(-1) and good cycling stability of retaining 87.9% after 2000 cycles in 1 M Na2SO4 under 0-1 V at 2 A g(-1) when the molar ratio of nickel-cobalt is 1:2 mmol. The enhanced electrochemical performance of NiCoHCF benefits from the strong synergistic utilization of nickel ions and cobalt ions. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：1315 / 1322

页数：8

共 52 条

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