Electrochemical characteristics of hydrothermally deposited nickel hydroxide on multi-walled carbon nanotube for supercapacitor electrode

Liu, Chenguang; Lee, Yong-Sung; Kim, Young-Ja; Song, In-Chul; Kim, Jong-Huy

doi:10.1016/j.synthmet.2009.07.010

Cited by 39 publications

(13 citation statements)

References 18 publications

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“…In this current paper, 80 scientific papers describing new Ni(OH) 2 or NiO-based electrodes for supercapacitor [12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,…”

Section: Methodsmentioning

confidence: 99%

Ni(OH)2 and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices

et al. 2018

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Nanocomposites of Ni(OH)2 or NiO have successfully been used in electrodes in the last five years, but they have been falsely presented as pseudocapacitive electrodes for electrochemical capacitors and hybrid devices. Indeed, these nickel oxide or hydroxide electrodes are pure battery-type electrodes which store charges through faradaic processes as can be shown by cyclic voltammograms or constant current galvanostatic charge/discharge plots. Despite this misunderstanding, such electrodes can be of interest as positive electrodes in hybrid supercapacitors operating under KOH electrolyte, together with an activated carbon-negative electrode. This study indicates the requirements for the implementation of Ni(OH)2-based electrodes in hybrid designs and the improvements that are necessary in order to increase the energy and power densities of such devices. Mass loading is the key parameter which must be above 10 mg·cm−2 to correctly evaluate the performance of Ni(OH)2 or NiO-based nanocomposite electrodes and provide gravimetric capacity values. With such loadings, rate capability, capacity, cycling ability, energy and power densities can be accurately evaluated. Among the 80 papers analyzed in this study, there are indications that such nanocomposite electrode can successfully improve the performance of standard Ni(OH)2 (+)//6 M KOH//activated carbon (−) hybrid supercapacitor.

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Section: Methodsmentioning

confidence: 99%

Ni(OH)2 and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices

et al. 2018

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“…The temperature-dependent specific capacitance was measured at 3 Ϯ 1 (iceϪwater bath), 27 (room temperature), and 55 Ϯ 2 °C (water bath) using CV. The constant E ) 1 2 C(∆V) 2 (5) current charge/discharge method was employed to test the long-term stability at various temperatures. The measurement was continuously carried out at 3 Ϯ 1 (iceϪwater bath), 27 (room temperature), and finally 55 Ϯ 2 °C (water bath).…”

Section: Synthesis Of Snomentioning

confidence: 99%

“…2 Very recently, Fan et al synthesized a carbon nanotube/MnO 2 composite using a microwave-assisted method, and capacitance as high as 944 F g Ϫ1 (85% of the theoretical value) was achieved at 1 mV s Ϫ1 scan rate for the low-loaded sample (carbon nanotubeϪ15% MnO 2 ). 18 Such investigations intend to balance the cost and the performance of supercapacitors.…”

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confidence: 99%

“…In recent decades, supercapacitors have attracted significant attention due to their high power density, longer cycle life than batteries, and higher energy density than conventional dielectric capacitors. − Such outstanding advantages make them good candidates for hybrid electric vehicles, large industrial equipment, and other renewable energy storage applications. , Depending on the charge storage mechanism, supercapacitors are generally classified into electrical double-layer capacitors (EDLCs) and pseudo-capacitors (or redox supercapacitors). , EDLCs, using carbon-based active materials with high surface area, build up electrical charge at the electrode/electrolyte interface. EDLCs usually have high power density but suffer from low capacitance and low rate capability.…”

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confidence: 99%

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Facile Coating of Manganese Oxide on Tin Oxide Nanowires with High-Performance Capacitive Behavior

et al. 2010

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In this paper, a very simple solution-based method is employed to coat amorphous MnO2 onto crystalline SnO2 nanowires grown on stainless steel substrate, which utilizes the better electronic conductivity of SnO2 nanowires as the supporting backbone to deposit MnO2 for supercapacitor electrodes. Cyclic voltammetry (CV) and galvanostatic charge/discharge methods have been carried out to study the capacitive properties of the SnO2/MnO2 composites. A specific capacitance (based on MnO2) as high as 637 F g(-1) is obtained at a scan rate of 2 mV s(-1) (800 F g(-1) at a current density of 1 A g(-1)) in 1 M Na2SO4 aqueous solution. The energy density and power density measured at 50 A g(-1) are 35.4 W h kg(-1) and 25 kW kg(-1), respectively, demonstrating the good rate capability. In addition, the SnO2/MnO2 composite electrode shows excellent long-term cyclic stability (less than 1.2% decrease of the specific capacitance is observed after 2000 CV cycles). The temperature-dependent capacitive behavior is also discussed. Such high-performance capacitive behavior indicates that the SnO2/MnO2 composite is a very promising electrode material for fabricating supercapacitors.

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“…On the other hand, most of the reports were more concerned about the enhancement of SC values. Insufficient attention was paid to capacitance degradations of metal oxide/hydroxide materials at high current densities[119]. Our group previously reported the utilization of lyotropic liquid crystal (LLC) template in potentiostatic electrodeposition of Co(OH) 2 which led to significant improvement in electrochemical On top of that, titanium was chosen as current collector owing to its wellknown excellent mechanical, chemical and thermal stability as well as abundance in the Earth's crust.…”

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confidence: 99%

Synthesis of nanomaterials and design of nanostructures for energy storage application

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Electrochemical characteristics of hydrothermally deposited nickel hydroxide on multi-walled carbon nanotube for supercapacitor electrode

Cited by 39 publications

References 18 publications

Ni(OH)2 and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices

Ni(OH)2 and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices

Facile Coating of Manganese Oxide on Tin Oxide Nanowires with High-Performance Capacitive Behavior

Synthesis of nanomaterials and design of nanostructures for energy storage application

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