Porous NiCo2O4 electrodes for high-energy asymmetric supercapacitor: effect of annealing

被引：5

作者：

Thorat, J. P. ^{[1
]}

Nikam, R. P. ^{[1
]}

Lokhande, V. C. ^{[2
]}

Lokhande, C. D. ^{[1
]}

机构：

[1] DY Patil Educ Soc, Ctr Interdisciplinary Res, Kolhapur 416006, India

[2] Chonnam Natl Univ, Dept Elect & Comp Engn, Gwangju 61186, South Korea

来源：

JOURNAL OF MATERIALS SCIENCE | 2023年 / 58卷 / 23期

关键词：

ELECTROCHEMICAL PERFORMANCE; NICKEL FOAM; THIN-FILMS; BATTERY-TYPE; NANOPARTICLES; OXIDE; DENSITY; CARBON; TEMPERATURE; FABRICATION;

D O I：

10.1007/s10853-023-08602-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nickel-cobalt hydroxide thin films were synthesized using the chemical bath deposition method, and the effect of thermal annealing (373-673 K) on their physicochemical and electrochemical characteristics was explored. The X-ray diffraction study showed a cubic crystalline structure of NiCo2O4 electrode formed above annealing temperature of 573 K. Field emission scanning electron spectroscopy (FE-SEM) study revealed that after annealing, NiCo2O4 electrode showed urchin-like microspheres morphology with superhydrophilic nature. The electrode annealed at 573 K exhibited outstanding electrochemical performance with a specific capacitance of 470 F g(-1) at 0.4 A g(-1) current density. Over 2000 cycles, electrode demonstrated capacitive retention of 75.55%. Finally, NiCo2O4 and Fe2O3 thin films were used to construct the asymmetric supercapacitor (ASC) device. The ASC device manifested energy density of 40 Wh kg(-1) at power density of 1.66 kW kg(-1) and 82% retention after 2000 CV cycles. [Graphics] .

引用

页码：9586 / 9604

页数：19

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