Cobalt hydroxide [Co(OH)<sub>2</sub>] loaded carbon fiber flexible electrode for high performance supercapacitor

Jagadale, Ajay D.; Guan, Guoqing; Du, Xiaoze; Hao, Xiaogang; Li, Xiumin; Abudula, Abuliti

doi:10.1039/c5ra11366k

Cited by 44 publications

(13 citation statements)

References 38 publications

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“…6 (a,b). Figure 6(a) indicates that, the GCF-based Co(OH) 2 electrode possesses moderate specific energy and power compared with previous literature values reported for aqueous electrolyte based Co(OH) 2 on different substrate 14 17 51 52 . The obtained maximum specific capacitance is higher than that reported for Co(OH) 2 with various nanostructures on different substrate and graphene-Co(OH) 2 composites 17 40 53 54 55 56 57 58 , as shown in Fig.…”

Section: Resultssupporting

confidence: 54%

PolyHIPE Derived Freestanding 3D Carbon Foam for Cobalt Hydroxide Nanorods Based High Performance Supercapacitor

Patil

Ghorpade

Nam

et al. 2016

Sci Rep

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The current paper describes enhanced electrochemical capacitive performance of chemically grown Cobalt hydroxide (Co(OH)2) nanorods (NRs) decorated porous three dimensional graphitic carbon foam (Co(OH)2/3D GCF) as a supercapacitor electrode. Freestanding 3D porous GCF is prepared by carbonizing, high internal phase emulsion (HIPE) polymerized styrene and divinylbenzene. The PolyHIPE was sulfonated and carbonized at temperature up to 850 °C to obtain graphitic 3D carbon foam with high surface area (389 m2 g−1) having open voids (14 μm) interconnected by windows (4 μm) in monolithic form. Moreover, entangled Co(OH)2 NRs are anchored on 3D GCF electrodes by using a facile chemical bath deposition (CBD) method. The wide porous structure with high specific surface area (520 m2 g−1) access offered by the interconnected 3D GCF along with Co(OH)2 NRs morphology, displays ultrahigh specific capacitance, specific energy and power. The Co(OH)2/3D GCF electrode exhibits maximum specific capacitance about ~1235 F g−1 at ~1 A g−1 charge-discharge current density, in 1 M aqueous KOH solution. These results endorse potential applicability of Co(OH)2/3D GCF electrode in supercapacitors and signifies that, the porous GCF is a proficient 3D freestanding framework for loading pseudocapacitive nanostructured materials.

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Section: Resultssupporting

confidence: 54%

PolyHIPE Derived Freestanding 3D Carbon Foam for Cobalt Hydroxide Nanorods Based High Performance Supercapacitor

Patil

Ghorpade

Nam

et al. 2016

Sci Rep

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“…The charge‐transfer resistance is due to the Faradic redox reaction of the NiCo LDH electrode material along with the exchange of OH − ions. This shows that the Ni 0.76 Co 0.24 LDH electrode had a highly conducting nature and a high charge‐transfer rate between the electrolyte and the active material . The short straight line at low frequency is due to a diffusion process and is not useful for charge storage.…”

Section: Resultsmentioning

confidence: 99%

Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Wang

et al. 2017

Electroanalysis

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107

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A unipolar pulse electrodeposition method was employed to controllably synthesize nanosheet type NiCo LDH. The effect of concentration rate of Ni(NO3)2/Co(NO3)2 preparation solution on crystalline structure, morphology and supercapacitive performance was investigated systematically. Experimental found that the morphology and composition of NiCo LDH was highly depend on the Ni2+/Co2+ molar ratios of preparation solution; and the obtained Ni0.76Co0.24 LDH materials showed small nanosheet size and uniform distribution on carbon fiber electrode. Ni0.76Co0.24 LDH electrode was evaluated for supercapacitor application, which revealed a high specific capacitances of 2189.8 and 1908.8 F g−1 at the current density of 1 and 30 A g−1 respectively and a good cycle stability, retaining 70.3 % of the initial capacitance after 20000 charge and discharge cycles at 50 A g−1. Moreover, the Ni0.76Co0.24 LDH electrode exhibits a high energy density of 76 Wh Kg−1 at a power density of 250 W Kg−1 and a high power density of 7500 W Kg−1 at energy density of 66 Wh Kg−1. The as‐prepared Ni0.76Co0.24 LDH as positive electrode for asymmetric supercapacitor exhibits excellent energy density of 4.1 Wh Kg‐1 at a power density of 4000 W Kg‐1

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“…In fact, this strategy also eliminates the limitation due to the poor electrical conductivity and low cycle stability of the TMC, as carbon materials provide the desired conducting pathways for charge transport as well as the chemical and physical stability for a large number of charge–discharge cycles. Consequently, numerous studies are found in the literature combining various CNSs with transition-metal oxides/hydroxides/sulfides, confirming the positive influence of the various CNSs on these transition-metal compounds (TMCs). − However, to our surprise, we could not find a single study in which the influence of different CNSs on a particular TMC (oxide/hydroxide/sulfide) has been compared in a systematic manner. Previous reports have only focused on the influence of a particular CNS on a given TMC, making it difficult for one to understand and predict which CNS will be the most effective in improving the electrode properties of a given TMC.…”

Section: Introductionmentioning

confidence: 88%

Nickel-Hydroxide-Nanohexagon-Based High-Performance Electrodes for Supercapacitors: A Systematic Investigation on the Influence of Six Different Carbon Nanostructures

2019

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Transition-metal compounds (TMCs) such as oxides, hydroxides, and sulfides are well-known pseudocapacitive materials whose capacitance has been shown to improve by combining them with different carbon nanostructures (CNSs). Here, we report a systematic investigation on the influence of six different CNSs: single-walled carbon nanotubes (SWCNTs), functionalized and multiwalled carbon nanotubes, graphene oxide (GO), reduced GO (rGO), and graphene nanoplatelets on Ni(OH)2 nanostructures, focusing on their electrochemical properties for potential use as electrode materials in supercapacitors. Uniformly distributed Ni(OH)2 nanohexagons (approximately 30–35 nm in size) were found to be well attached to the surfaces of these CNSs. Among the studied CNSs, rGO appeared to be the best as its composite with Ni(OH)2 exhibited the highest specific capacitance of 2306 F/g at 3 A/g along with 81.4% capacity retention after 5000 cycles. The SWCNT/Ni(OH)2 composite showed the second best performance, with all other composites showing much lower performances. The lower charge transfer resistance and higher ion diffusion coefficient of the rGO/Ni(OH)2 composite, compared to those of all other composites of Ni(OH)2, have been identified as the reason for its improved performance. These results may find far-fetching significance in designing TMC-nanostructure-based electrodes modified with CNSs for supercapacitors.

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Cobalt hydroxide [Co(OH)₂] loaded carbon fiber flexible electrode for high performance supercapacitor

Cited by 44 publications

References 38 publications

PolyHIPE Derived Freestanding 3D Carbon Foam for Cobalt Hydroxide Nanorods Based High Performance Supercapacitor

PolyHIPE Derived Freestanding 3D Carbon Foam for Cobalt Hydroxide Nanorods Based High Performance Supercapacitor

Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Nickel-Hydroxide-Nanohexagon-Based High-Performance Electrodes for Supercapacitors: A Systematic Investigation on the Influence of Six Different Carbon Nanostructures

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Cobalt hydroxide [Co(OH)2] loaded carbon fiber flexible electrode for high performance supercapacitor

Cited by 44 publications

References 38 publications

PolyHIPE Derived Freestanding 3D Carbon Foam for Cobalt Hydroxide Nanorods Based High Performance Supercapacitor

PolyHIPE Derived Freestanding 3D Carbon Foam for Cobalt Hydroxide Nanorods Based High Performance Supercapacitor

Controllable Synthesis of NiCo LDH Nanosheets for Fabrication of High‐Performance Supercapacitor Electrodes

Nickel-Hydroxide-Nanohexagon-Based High-Performance Electrodes for Supercapacitors: A Systematic Investigation on the Influence of Six Different Carbon Nanostructures

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Cobalt hydroxide [Co(OH)₂] loaded carbon fiber flexible electrode for high performance supercapacitor