Preparation and electrochemical performance of the layered cobalt oxide (Co3O4) as supercapacitor electrode material

Xie, Lingling; Li, Kaixi; Sun, Guohua; Hu, Zhongai; Lv, Chunxiang; Wang, Jianlong; Zhang, Changming

doi:10.1007/s10008-012-1856-7

Cited by 101 publications

(29 citation statements)

References 45 publications

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“…GO spectrum reveals the presence of various oxygen containing functional groups attached to the graphite lattice on oxidation. Band at 3417 and 1628 cm -1 was attributed to the stretching vibrations and deformation vibrations of hydroxyl groups, respectively [28]. C=O stretching vibration of sp 2 carbon belonging to carboxyl COOH groups situated at the edges of graphite oxide sheets was observed at 1729 cm -1 .…”

Section: Ftir Studiesmentioning

confidence: 98%

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Naveen

Manimaran

Selvasekarapandian

2015

J Mater Sci: Mater Electron

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Cobalt oxide (Co 3 O 4 )-graphene nanosheets (GNS) composite was prepared using a novel route. Room temperature prepared graphite oxide was exfoliated at low temperature and subsequently reduced to GNS by chemical method. Successful compound formation was confirmed and structural details were obtained from XRD studies. Cobalt oxide was found to crystallize in spinel fcc structure with average crystallite size of 9 nm in the composite. FTIR and XPS study confirms the removal of oxygen containing functional group in reduced graphene and spinel formation of cobalt oxide in the composite. Raman spectra depict the reestablishment of sp 2 conjugated network of carbon atoms, on reduction to graphene. FESEM images reveal the nanosheet like morphology of the graphene being retained in the composite and promoting ion diffusion channels. Electrochemical characterization discloses the pseudocapacitive behaviour of the composite material. Higher specific capacitance of 650 F/g was exhibited by GNS-Co 3 O 4 at 5 mV/s scan rate. Symmetrical supercapacitor fabricated using GNS-Co 3 O 4 demonstrated superior power characteristics. Graphene in the composite has substantially increased the electron and ion transport in the electrode material leading to enhanced performance.

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Section: Ftir Studiesmentioning

confidence: 98%

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Naveen

Manimaran

Selvasekarapandian

2015

J Mater Sci: Mater Electron

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“…When use HMT as a weak base hydrolyzing agent, Co 2+ and Ni 2+ ions reacted with hydroxides to form layered double hydroxide nanosheets [36]. However, replacing the hexamethylenetetramine with urea, upon the introduction of CO 3 2− anions, the Co 2+ and Ni 2+ ions coordinate with CO 3 2− and OH − to form NiCo 2 (OH) 2x (CO 3 ) (2 − x) ·nH 2 O nanowires [11,37].…”

Section: Resultsmentioning

confidence: 97%

“…CO 3 2− plays a key role in controlling the morphology to nanowires. When use HMT as a weak base hydrolyzing agent, Co 2+ and Ni 2+ ions reacted with hydroxides to form layered double hydroxide nanosheets [36].…”

Section: Resultsmentioning

confidence: 99%

“…Electrochemical energy storage device will become more and more important in future societies because of the limited availability of fossil fuels, and the increasing environmental pollution [1][2][3]. Among the electrochemical energy storage device available currently, supercapacitors (SCs), also known as electrochemical capacitors, have attracted significant research attention because they can provide a high-power/energy density, long lifespan, fast charge and discharge process, and excellent reversibility [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Controlled synthesis of NiCo2O4 nanowires and nanosheets on reduced graphene oxide nanosheets for supercapacitors

Wang

Zhang

Luo

et al. 2015

J Solid State Electrochem

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Two types of homogeneous NiCo 2 O 4 -NW/rGO composite and NiCo 2 O 4 -NS/rGO composite are synthesized via a facile and effective low-solution approach coupled with a simple post-annealing treatment. Importantly, the morphologies of NiCo 2 O 4 can be easily controlled to be nanowires or nanosheets by using different hydrolyzing agents without using of templates, surfactant and stabilizer. These two different morphologies of composite are evaluated as electrodes for supercapacitors, and the NiCo 2 O 4 -NS/rGO exhibits good electrochemical performance. Compared with NiCo 2 O 4 -NW/rGO (i.e., 1,137.8 F g −1 at 1 A g −1 and 683.3 F g −1 at 15 A g −1 ), NiCo 2 O 4 -NS/rGO achieves much higher capacitance (i.e., 1,217.4 F g −1 at 1 A g −1 and 760 F g −1 at 15 A g −1 ) with excellent cycling stability of 94 % retention of specific capacitance after 1,000 cycles. The results show that these NiCo 2 O 4 /rGO composites are promising for high-performance supercapacitors.

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“…There are hydrothermal method [2,[7][8][9], the thermal decomposition method [10][11], solid-phase precipitation [12], sol-gel method [3,[13][14] and chemical vapor deposition method [15][16] for preparing Co 3 O 4 in laboratory. Generally using the thermal decomposition of cobalt salts to get Co 3 O 4 is easy to operate in industry.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electrochemical Characterization of La Doping Co3O4 Super Capacitor Electrode Materials

Chen¹,

Zhan²

2015

Proceedings of the International Conference on Chemical, Material and Food Engineering

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Abstract-An aqueous solution containing deionized water, cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), ethylene glycol (EG) and urea (NH 2 CONH 2 ) were reacted in an autoclave with hydrothermal reaction method at 180 o C for 20 h to generate precursors with 0.1%, 0.2%, 0.3%, 0.4% and 0.5% of La (NO3)3. Then the precursor was decomposed to cobalt oxide powders at 300-500 oC for 2h. The morphology and electrochemical properties of samples were characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM) and electrochemical analyzer. The results suggested that the average crystallite size and fine crystallinity of Co3O4 crystal lattices increased with the mass percentage of La (NO3)3. Ethylene glycol as a shaping agent may be the possible reasons of decrease in particle size at higher temperatures in the process of the formation of Co3O4 microspheres. The specific capacitance and the current density of the best sample are 5 ma/s, 372.7 F/g and 10 ma/s, 310.56 F/g respectively.

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Preparation and electrochemical performance of the layered cobalt oxide (Co3O4) as supercapacitor electrode material

Cited by 101 publications

References 45 publications

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Controlled synthesis of NiCo2O4 nanowires and nanosheets on reduced graphene oxide nanosheets for supercapacitors

Preparation and Electrochemical Characterization of La Doping Co3O4 Super Capacitor Electrode Materials

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