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Worku AK, Asfaw A, Ayele DW. Engineering of Co 3O 4 electrode via Ni and Cu-doping for supercapacitor application. Front Chem 2024; 12:1357127. [PMID: 38698936 PMCID: PMC11063336 DOI: 10.3389/fchem.2024.1357127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 04/02/2024] [Indexed: 05/05/2024] Open
Abstract
Although cobalt oxides show great promise as supercapacitor electrode materials, their slow kinetics and low conductivity make them unsuitable for widespread application. We developed Ni and Cu-doped Co3O4 nanoparticles (NPs) via a simple chemical co-precipitation method without the aid of a surfactant. The samples were analyzed for their composition, function group, band gap, structure/morphology, thermal property, surface area and electrochemical property using X-ray diffraction (XRD), ICP-OES, Fourier transform infrared (FTIR) spectroscopy, Ultraviolet-visible (UV-Vis), Scanning electron microscopy (SEM), Thermogravimetric analysis (TGA) and/or Differential thermal analysis (DTA), Brunauer-Emmett-Teller (BET), and Impedance Spectroscopy (EIS), Cyclic voltammetry (CV), respectively. Notably, for the prepared sample, the addition of Cu to Co3O4 NPs results in a 11.5-fold increase in specific surface area (573.78 m2 g-1) and a decrease in charge transfer resistance. As a result, the Ni doped Co3O4 electrode exhibits a high specific capacitance of 749 F g-1, 1.75 times greater than the pristine Co3O4 electrode's 426 F g-1. The electrode's enhanced surface area and electronic conductivity are credited with the significant improvement in electrochemical performance. The produced Ni doped Co3O4 electrode has the potential to be employed in supercapacitor systems, as the obtained findings amply demonstrated.
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Affiliation(s)
- Ababay Ketema Worku
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, Ethiopia
| | - Alemu Asfaw
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, Ethiopia
| | - Delele Worku Ayele
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, Ethiopia
- Department of Chemistry, College of Science, Bahir Dar University, Bahir Dar, Ethiopia
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Alem AF, Worku AK, Ayele DW, Habtu NG, Ambaw MD, Yemata TA. Enhancing pseudocapacitive properties of cobalt oxide hierarchical nanostructures via iron doping. Heliyon 2023; 9:e13817. [PMID: 36873468 PMCID: PMC9976307 DOI: 10.1016/j.heliyon.2023.e13817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/08/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023] Open
Abstract
Through co-precipitation and post-heat processing, nanostructured Fe-doped Co3O4 nanoparticles (NPs) were developed. Using the SEM, XRD, BET, FTIR, TGA/DTA, UV-Vis, and techniques were examined. The XRD analysis presented that Co3O4 and Co3O4 nanoparticles that had been doped with 0.25 M Fe formed single cubic phase Co3O4 NPs with average crystallite sizes of 19.37 nm and 14.09 nm, respectively. The as prepared NPs have porous architectures via SEM analyses. The BET surface areas of Co3O4 and 0.25 M Fe-doped Co3O4 NPs were 53.06 m2/g and 351.56 m2/g, respectively. Co3O4 NPs have a band gap energy of 2.96 eV and an extra sub-band gap energy of 1.95 eV. Fe-doped Co3O4 NPs were also found to have band gap energies between 2.54 and 1.46 eV. FTIR spectroscopy was used to determine whether M-O bonds (M = Co, Fe) were present. The doping impact of iron results in the doped Co3O4 samples having better thermal characteristics. The highest specific capacitance was achieved using 0.25 M Fe-doped Co3O4 NPs at 5 mV/s, which corresponding to 588.5 F/g via CV analysis. Additionally, 0.25 M Fe-doped Co3O4 NPs had energy and power densities of 9.17 W h/kg and 472.1 W/kg, correspondingly.
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Affiliation(s)
- Asab Fetene Alem
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, P.O. Box 26, Ethiopia
| | - Ababay Ketema Worku
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, P.O. Box 26, Ethiopia
- Corresponding author.
| | - Delele Worku Ayele
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, P.O. Box 26, Ethiopia
- Department of Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
- Corresponding author. Department of Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia.
| | - Nigus Gabbiye Habtu
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, Bahir Dar, P.O. Box 26, Ethiopia
| | - Mehary Dagnew Ambaw
- Department of Industrial Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Temesgen Atnafu Yemata
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, Bahir Dar, P.O. Box 26, Ethiopia
- Corresponding author.
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Alem AF, Worku AK, Ayele DW, Wubieneh TA, Teshager AA, Tadele mihret kndie, Admasu BT, Teshager MA, Asege AA, Ambaw MD, Zeleke MA, Shibesh AK, Yemata TA. Ag doped Co 3O 4 nanoparticles for high-performance supercapacitor application. Heliyon 2023; 9:e13286. [PMID: 36816229 PMCID: PMC9929304 DOI: 10.1016/j.heliyon.2023.e13286] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 02/03/2023] Open
Abstract
Ag doped Co3O4 nanoparticles (NPs) were synthesized via a co-precipitation method changing the concentration of Ag. The crystal structure, morphology, surface area, functional group, optical band gap, and thermal property were investigated by XRD, SEM, BET, FTIR, UV-Vis, and TGA/DTA techniques. The XRD results showed the formation of single-cubic Co3O4 nanostructured materials with an average crystal size of 19.37 nm and 12.98 nm for pristine Co3O4 and 0.25 M Ag-doped Co3O4 NPs. Morphological studies showed that pristine Co3O4 and 0.25 M Ag-doped Co3O4 NPs having a porous structure with small spherical grains, porous structures with sponge-like structures, and loosely packed porous structures, respectively. The pristine and 0.25 M Ag-doped Co3O4 NPs showed BET surface areas of 53.06 m2/g, and 407.33 m2/g, respectively. The band gap energy of Co3O4 NPs were 2.96 eV, with additional sub-bandgap energy of 1.95 eV. Additionally, it was discovered that the band gap energies of 0.25 M Ag-doped Co3O4 NPs ranged from 2.2 to 2.75 eV, with an extra sub-band with energies ranging from 1.43 to 1.94 eV for all as-prepared samples. The Ag-doped Co3O4 as prepared samples show improved thermal properties due to the doping effect of silver. The CV test confirmed that the 0.25 M Ag-doped Co3O4 NPs exhibited the highest specific capacitance value of 992.7 F/g at 5 mV/s in a 0.1 M KOH electrolyte solution. The energy density and power density of 0.25 M Ag-doped Co3O4 NPs were 27.9 W h/kg and 3816.1 W/kg, respectively.
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Affiliation(s)
- Asab Fetene Alem
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Ababay Ketema Worku
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia,Corresponding author.
| | - Delele Worku Ayele
- Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia,Department of Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia,Corresponding author. Bahir Dar Energy Center, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Tessera Alemneh Wubieneh
- School of Materials Science and Engineering, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Alebel abebaw Teshager
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Tadele mihret kndie
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Bimrew Tamrat Admasu
- Faculty of Mechanical Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Minbale Admas Teshager
- Department of Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Addisu Alemayehu Asege
- School of Materials Science and Engineering, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Mehary Dagnew Ambaw
- Department of Industrial Chemistry, College of Science, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Misganaw Alemu Zeleke
- School of Materials Science and Engineering, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
| | - Alemayehu Kifle Shibesh
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
| | - Temesgen Atnafu Yemata
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology-Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia,Corresponding author.
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Gao YP, Huang KJ, Wang FT, Hou YY, Zhao LD, Wang BY, Xu J, Shuai H, Li G. The self-powered electrochemical biosensing platform with multi-amplification strategy for ultrasensitive detection of microRNA-155. Anal Chim Acta 2023; 1239:340702. [PMID: 36628768 DOI: 10.1016/j.aca.2022.340702] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022]
Abstract
A self-powered biosensor (SPB) was constructed for the ultra-sensitive detection of microRNA-155 (miR-155) by combining a capacitor/enzymatic biofuel cell (EBFC), a strategy of rolling circle amplification (RCA) and a digital multimeter (DMM). The experimental results show that the sensitivity of the assembled EBFC-SPB can reach 15.85 μA/pM with the action of matching capacitor, which is 513% of that without capacitor (3.09 μA/pM). This achieves the first signal amplification. Furthermore, when the target miR-155 triggers RCA, electrons are continuous generated and flow to the biocathode through the external circuit to catalyze the reduction of oxygen and release [Ru(NH3)6]3+ electron acceptor. This achieves the second signal amplification. Finally, DMM is used to convert the signal into instantaneous current and amplify it for real-time reading. This achieves the third signal amplification. Therefore, the limit of detection (LOD) of the developed biosensor is as low as 0.17 fM (S/N = 3), and the linear range is between 0.5 fM and 10,000 fM, indicating that the EBFC-SPB has a broad application prospect for cancer marker of miR-155 with ultrasensitive detection.
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Affiliation(s)
- Yong-Ping Gao
- International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan University, Kaifeng, 475004, PR China; School of Science and Engineering, Xinyang University, Xinyang, 464000, PR China
| | - Ke-Jing Huang
- Key Laboratory of Guangxi Colleges and Universities for Food Safety and Pharmaceutical Analytical Chemistry, School of Chemistry and Chemical and Engineering, Guangxi Minzu University, Nanning, 530008, PR China.
| | - Fu-Ting Wang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, PR China
| | - Yang-Yang Hou
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, PR China
| | - Lu-di Zhao
- School of Science and Engineering, Xinyang University, Xinyang, 464000, PR China
| | - Bo-Ya Wang
- School of Science and Engineering, Xinyang University, Xinyang, 464000, PR China
| | - Jing Xu
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, PR China
| | - Honglei Shuai
- School of Science and Engineering, Xinyang University, Xinyang, 464000, PR China
| | - Guoqiang Li
- International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Henan University, Kaifeng, 475004, PR China.
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Ahmad S, Hussain T, Ahmad R, Imranullah M, Shuaib U, Mubarik FE, Yasin A, Qazi UY. Natural sunlight-driven photocatalytic degradation of methyl blue using spinel MgAl2O4-rGO nanocomposite. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02562-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Liu J, Ren L, Luo J, Song J. Microwave synthesis of NiSe/NiTe2 nanocomposite grown in situ on Ni foam for all-solid-state asymmetric supercapacitors. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Fang Q, Sun M, Ren X, Sun Y, Yan Y, Gan Z, Huang J, Cao B, Shen W, Li Z, Fu Y. MnCo 2O 4/Ni 3S 4 nanocomposite for hybrid supercapacitor with superior energy density and long-term cycling stability. J Colloid Interface Sci 2021; 611:503-512. [PMID: 34971961 DOI: 10.1016/j.jcis.2021.12.122] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 12/19/2021] [Accepted: 12/20/2021] [Indexed: 12/15/2022]
Abstract
MnCo2O4 is regarded as a good electrode material for supercapacitor due to its high specific capacity and good structural stability. However, its poor electrical conductivity limits its wide-range applications. To solve this issue, we integrated the MnCo2O4 with Ni3S4, which has a good electrical conductivity, and synthesized a MnCo2O4/Ni3S4 nanocomposite using a two-step hydrothermal process. Comparing with individual MnCo2O4 and Ni3S4, the MnCo2O4/Ni3S4 nanocomposite showed a higher specific capacity and a better cycling stability as the electrode for the supercapacitor. The specific capacity value of the MnCo2O4/Ni3S4 electrode was 904.7 C g-1 at 1 A g-1 with a potential window of 0-0.55 V. A hybrid supercapacitor (HSC), assembled using MnCo2O4/Ni3S4 and active carbon as the cathode and anode, respectively, showed a capacitance of 116.4 F g-1 at 1 A g-1, and a high energy density of 50.7 Wh kg-1 at 405.8 W kg-1. Long-term electrochemical stability tests showed an obvious increase of the HSC's capacitance after 5500 charge/discharge cycles, reached a maximum value of ∼162.7% of its initial value after 25,000 cycles, and then remained a stable value up to 64,000 cycles. Simultaneously, its energy density was increased to 54.2 Wh kg-1 at 380.3 W kg-1 after 64,000 cycles.
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Affiliation(s)
- Qisheng Fang
- School of Physics, University of Electronic Science and Technology of China, Chengdu 6111731, PR China
| | - Mengxuan Sun
- School of Physics, University of Electronic Science and Technology of China, Chengdu 6111731, PR China
| | - Xiaohe Ren
- School of Physics, University of Electronic Science and Technology of China, Chengdu 6111731, PR China
| | - Yongxiu Sun
- School of Physics, University of Electronic Science and Technology of China, Chengdu 6111731, PR China
| | - Yijun Yan
- School of Physics, University of Electronic Science and Technology of China, Chengdu 6111731, PR China
| | - Ziwei Gan
- School of Physics, University of Electronic Science and Technology of China, Chengdu 6111731, PR China
| | - Jianan Huang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Baobao Cao
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Wenzhong Shen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan 030001, PR China
| | - Zhijie Li
- School of Physics, University of Electronic Science and Technology of China, Chengdu 6111731, PR China.
| | - YongQing Fu
- Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne NE1 8ST, UK.
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Askari MB, Salarizadeh P, Di Bartolomeo A, Şen F. Enhanced electrochemical performance of MnNi 2O 4/rGO nanocomposite as pseudocapacitor electrode material and methanol electro-oxidation catalyst. NANOTECHNOLOGY 2021; 32:325707. [PMID: 33946059 DOI: 10.1088/1361-6528/abfded] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
Binary transition metal oxides with encouraging electrocatalyst properties have been suggested as electrode materials for supercapacitors and methanol oxidation. Hence, in this work, a binary mixed metal oxide based on nickel and manganese (MnNi2O4) and its hybrid with reduced graphene oxide were synthesized by a one-step hydrothermal method. After physical and morphological characterization, the potential of these nanostructures was investigated for use as supercapacitor electrodes and methanol electro-oxidation. The results of the electrochemical analysis showed a substantial effect of adding rGO to the MnNi2O4. The MnNi2O4/rGO hybrid electrode supercapacitor exhibited good stability of 93% after 2000 consecutive CV cycles and a specific capacitance of 575 F g-1at the current density of 0.5 A g-1. Furthermore, the application of this hybrid nanomaterial in the methanol electro-oxidation reaction (MOR) indicated its appropriate electrochemical efficiency and stability in methanol oxidation. Our results show that MnNi2O4/rGO can be considered as a promising electrode material for energy applications.
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Affiliation(s)
- Mohammad Bagher Askari
- Department of Physics, Faculty of Science, University of Guilan, PO Box 41335-1914, Rasht, Iran
| | - Parisa Salarizadeh
- High-Temperature Fuel Cell Research Department, Vali-e-Asr University of Rafsanjan, Rafsanjan 1599637111, Iran
| | - Antonio Di Bartolomeo
- Department of Physics 'E. R. Caianiello' and 'Interdepartmental center NANOMATES', University of Salerno, I-84084, Fisciano, Salerno, Italy
| | - Fatih Şen
- Sen Research Group, Department of Biochemistry, University of Dumlupınar, 43000 Kütahya, Turkey
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Transition Metal Oxide Electrode Materials for Supercapacitors: A Review of Recent Developments. NANOMATERIALS 2021; 11:nano11051248. [PMID: 34068548 PMCID: PMC8151924 DOI: 10.3390/nano11051248] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/29/2021] [Accepted: 05/04/2021] [Indexed: 01/21/2023]
Abstract
In the past decades, the energy consumption of nonrenewable fossil fuels has been increasing, which severely threatens human life. Thus, it is very urgent to develop renewable and reliable energy storage devices with features of environmental harmlessness and low cost. High power density, excellent cycle stability, and a fast charge/discharge process make supercapacitors a promising energy device. However, the energy density of supercapacitors is still less than that of ordinary batteries. As is known to all, the electrochemical performance of supercapacitors is largely dependent on electrode materials. In this review, we firstly introduced six typical transition metal oxides (TMOs) for supercapacitor electrodes, including RuO2, Co3O4, MnO2, ZnO, XCo2O4 (X = Mn, Cu, Ni), and AMoO4 (A = Co, Mn, Ni, Zn). Secondly, the problems of these TMOs in practical application are presented and the corresponding feasible solutions are clarified. Then, we summarize the latest developments of the six TMOs for supercapacitor electrodes. Finally, we discuss the developing trend of supercapacitors and give some recommendations for the future of supercapacitors.
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Gao YP, Xu J, Huang KJ, Lu H, Pang YX, Li GQ. An overview of the current status and prospects of cathode materials based on transition metal sulfides for magnesium-ion batteries. CrystEngComm 2021. [DOI: 10.1039/d1ce01029h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
TMSs as cathode materials used in MIBs.
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Affiliation(s)
- Yong-Ping Gao
- School of Physics and Electronics, Henan University, Kaifeng 475004, China
- College of Science and Technology, Xinyang College, Xinyang 464000, China
| | - Jing Xu
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Ke-Jing Huang
- School of Chemistry and Chemical and Engineering, Guangxi University for Nationalities, Nanning 530008, China
| | - Hui Lu
- College of Science and Technology, Xinyang College, Xinyang 464000, China
| | - Ya-Xi Pang
- College of Science and Technology, Xinyang College, Xinyang 464000, China
| | - Guo-qiang Li
- School of Physics and Electronics, Henan University, Kaifeng 475004, China
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Kim Y, Yun D, Jeon J. Performance improvement of aqueous zinc-iron flow batteries through organic ligand complexation of Fe(II)/Fe(III). Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136691] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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13
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Efficient aqueous processing and utilization of high-quality graphene for high performance supercapacitor electrode. J Colloid Interface Sci 2020; 561:668-677. [DOI: 10.1016/j.jcis.2019.11.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 11/08/2019] [Accepted: 11/11/2019] [Indexed: 01/21/2023]
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14
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Eivazzadeh-Keihan R, Taheri-Ledari R, Khosropour N, Dalvand S, Maleki A, Mousavi-Khoshdel SM, Sohrabi H. Fe O4/GO@melamine-ZnO nanocomposite: A promising versatile tool for organic catalysis and electrical capacitance. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124335] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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15
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Gao Y, Wei Z, Xu J. High-performance asymmetric supercapacitor based on 1T-MoS2 and MgAl-Layered double hydroxides. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2019.135195] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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16
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Sagadevan S, Marlinda AR, Johan MR, Umar A, Fouad H, Alothman OY, Khaled U, Akhtar MS, Shahid MM. Reduced graphene/nanostructured cobalt oxide nanocomposite for enhanced electrochemical performance of supercapacitor applications. J Colloid Interface Sci 2019; 558:68-77. [PMID: 31585223 DOI: 10.1016/j.jcis.2019.09.081] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/19/2019] [Accepted: 09/21/2019] [Indexed: 01/25/2023]
Abstract
We demonstrate the preparation of nanostructures cobalt oxide/reduced graphene oxide (Co3O4/rGO) nanocomposites by a simple one-step cost-effective hydrothermal technique for possible electrode materials in supercapacitor application. The X-ray diffraction patterns were employed to confirm the nanocomposite crystal system of Co3O4/rGO by demonstrating the existence of normal cubic spinel structure of Co3O4 in the matrix of Co3O4/rGO nanocomposite. FTIR and FT-Raman studies manifested the structural behaviour and quality of prepared Co3O4/rGO nanocomposite. The optical properties of the nanocomposite Co3O4/rGO have been investigated by UV absorption spectra. The SEM/TEM images showed that the Co3O4 nanoparticles in the Co3O4/rGO nanocomposites were covered over the surface of the rGO sheets. The electrical properties were analyzed in terms of real and imaginary permittivity, dielectric loss and AC conductivity. The electrocatalytic activities of synthesized Co3O4/rGO nanocomposites were determined by cyclic voltammetry and charge-discharge cycle to evaluate the supercapacitive performance. The specific capacitance of 754 Fg-1 was recorded for Co3O4/rGO nanocomposite based electrode in three electrode cell system. The electrode material exhibited an acceptable capability and excellent long-term cyclic stability by maintaining 96% after 1000 continuous cycles. These results showed that the prepared sample could be an ideal candidate for high-energy application as electrode materials. The synthesized Co3O4/rGO nanocomposite is a versatile material and can be used in various application such as fuel cells, electrochemical sensors, gas sensors, solar cells, and photocatalysis.
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Affiliation(s)
- Suresh Sagadevan
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia.
| | - A R Marlinda
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia
| | - Mohd Rafie Johan
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia
| | - Ahmad Umar
- Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices, Najran University, Najran 11001, Saudi Arabia.
| | - H Fouad
- Applied Medical Science Dept., Community College, King Saud University, Riyadh, Saudi Arabia; Department of Biomedical Engineering, Faculty of Engineering, Helwan University, Egypt
| | - Othman Y Alothman
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Usama Khaled
- Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia; Department of Electrical Engineering, Faculty of Energy Engineering, Aswan University, Aswan 81528, Egypt
| | - M S Akhtar
- New and Renewable Energy Materials Development Center (NewREC), Chonbuk National University, Jeonbuk 56332, Republic of Korea.
| | - M M Shahid
- Higher Institution Centre of Excellence (HICoE), UM Power Energy Dedicated Advanced Centre (UMPEDAC), 59990 Kuala Lumpur, Malaysia
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