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Synthesis of flower-like MnO2 nanostructure with freshly prepared Cu particles and electrochemical performance in supercapacitors
Four types of flowerlike manganese dioxide in nano scale was synthesized via a liquid phase method in KMnO4-H2SO4 solution and Cu particles, wherein the effect of Cu particles was investigated in detail. The obtained manganese dioxide powder was characterized by XRD, SEM and TEM, and the supercapaci...
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Published in: | PloS one 2022-01, Vol.17 (6), p.e0269086-e0269086 |
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description | Four types of flowerlike manganese dioxide in nano scale was synthesized via a liquid phase method in KMnO4-H2SO4 solution and Cu particles, wherein the effect of Cu particles was investigated in detail. The obtained manganese dioxide powder was characterized by XRD, SEM and TEM, and the supercapacity properties of MnO2 electrode materials were measured. The results showed that doping carbon black can benefit to better dispersion of copper particles, resulting in generated smaller size of Cu particles, and the morphology of MnO2 nanoparticles was dominated by that of Cu particles. The study of MnO2 synthesis by different sources of Cu particles showed that the size of MnO2 particles decreased significantly with freshly prepared fine copper powder compared with using commercial Cu powder, and the size of MnO2 particles can be further reduced to 120 nm by prepared Cu particles with smaller size. Therefore, it was suggested that the copper particles served as not only the reductant and but also the nuclei centre for the growth of MnO2 particles in synthesis process MnO2, and that is the reason how copper particles worked on the growth of flower-like MnO2 and electrochemical property. In the part of investigation for electrochemical property, the calculated results of b values indicated that the electrode materials have pseudo capacitance property, and the highest specific capacitance of 197.2 F g-1 at 2 mV s-1 and 148 F/g at 1 A/g were obtained for MCE electrode materials (MnO2 was synthesized with freshly prepared copper particles, where carbon black was used and dispersed in ethanol before preparation of Cu particles). The values of charge transfer resistance in all types of MnO2 materials electrodes were smaller than 0.08 Ω. The cycling retention of MCE material electrode is still kept as 93.8% after 1000 cycles. |
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The obtained manganese dioxide powder was characterized by XRD, SEM and TEM, and the supercapacity properties of MnO2 electrode materials were measured. The results showed that doping carbon black can benefit to better dispersion of copper particles, resulting in generated smaller size of Cu particles, and the morphology of MnO2 nanoparticles was dominated by that of Cu particles. The study of MnO2 synthesis by different sources of Cu particles showed that the size of MnO2 particles decreased significantly with freshly prepared fine copper powder compared with using commercial Cu powder, and the size of MnO2 particles can be further reduced to 120 nm by prepared Cu particles with smaller size. Therefore, it was suggested that the copper particles served as not only the reductant and but also the nuclei centre for the growth of MnO2 particles in synthesis process MnO2, and that is the reason how copper particles worked on the growth of flower-like MnO2 and electrochemical property. In the part of investigation for electrochemical property, the calculated results of b values indicated that the electrode materials have pseudo capacitance property, and the highest specific capacitance of 197.2 F g-1 at 2 mV s-1 and 148 F/g at 1 A/g were obtained for MCE electrode materials (MnO2 was synthesized with freshly prepared copper particles, where carbon black was used and dispersed in ethanol before preparation of Cu particles). The values of charge transfer resistance in all types of MnO2 materials electrodes were smaller than 0.08 Ω. The cycling retention of MCE material electrode is still kept as 93.8% after 1000 cycles.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0269086</identifier><identifier>PMID: 35653411</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Black carbon ; Capacitance ; Carbon ; Carbon black ; Charge transfer ; Copper ; Electrochemical analysis ; Electrochemistry ; Electrode materials ; Electrodes ; Energy storage ; Engineering and Technology ; Ethanol ; Flowers ; Graphene ; Liquid phases ; Manganese ; Manganese dioxide ; Metal oxides ; Morphology ; Nanocomposites ; Nanomaterials ; Nanoparticles ; Particle size ; Physical Sciences ; Potassium permanganate ; Powder ; Reducing agents ; Research and Analysis Methods ; Sulfuric acid ; Synthesis</subject><ispartof>PloS one, 2022-01, Vol.17 (6), p.e0269086-e0269086</ispartof><rights>2022 Shen et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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The obtained manganese dioxide powder was characterized by XRD, SEM and TEM, and the supercapacity properties of MnO2 electrode materials were measured. The results showed that doping carbon black can benefit to better dispersion of copper particles, resulting in generated smaller size of Cu particles, and the morphology of MnO2 nanoparticles was dominated by that of Cu particles. The study of MnO2 synthesis by different sources of Cu particles showed that the size of MnO2 particles decreased significantly with freshly prepared fine copper powder compared with using commercial Cu powder, and the size of MnO2 particles can be further reduced to 120 nm by prepared Cu particles with smaller size. Therefore, it was suggested that the copper particles served as not only the reductant and but also the nuclei centre for the growth of MnO2 particles in synthesis process MnO2, and that is the reason how copper particles worked on the growth of flower-like MnO2 and electrochemical property. In the part of investigation for electrochemical property, the calculated results of b values indicated that the electrode materials have pseudo capacitance property, and the highest specific capacitance of 197.2 F g-1 at 2 mV s-1 and 148 F/g at 1 A/g were obtained for MCE electrode materials (MnO2 was synthesized with freshly prepared copper particles, where carbon black was used and dispersed in ethanol before preparation of Cu particles). The values of charge transfer resistance in all types of MnO2 materials electrodes were smaller than 0.08 Ω. The cycling retention of MCE material electrode is still kept as 93.8% after 1000 cycles.</description><subject>Black carbon</subject><subject>Capacitance</subject><subject>Carbon</subject><subject>Carbon black</subject><subject>Charge transfer</subject><subject>Copper</subject><subject>Electrochemical analysis</subject><subject>Electrochemistry</subject><subject>Electrode materials</subject><subject>Electrodes</subject><subject>Energy storage</subject><subject>Engineering and Technology</subject><subject>Ethanol</subject><subject>Flowers</subject><subject>Graphene</subject><subject>Liquid phases</subject><subject>Manganese</subject><subject>Manganese dioxide</subject><subject>Metal oxides</subject><subject>Morphology</subject><subject>Nanocomposites</subject><subject>Nanomaterials</subject><subject>Nanoparticles</subject><subject>Particle size</subject><subject>Physical Sciences</subject><subject>Potassium permanganate</subject><subject>Powder</subject><subject>Reducing 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of flower-like MnO2 nanostructure with freshly prepared Cu particles and electrochemical performance in supercapacitors</title><author>Shen, Lingling ; Peng, Linghui ; Fu, Runfang ; Liu, Zichuan ; Jiang, Xuchuan ; Wang, Dexi ; Kamali, Ali Reza ; Shi, Zhongning</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c502t-f7dda763c527af83c1f639533ce5661f8181e58b52155dbb861aea04629c585d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Black carbon</topic><topic>Capacitance</topic><topic>Carbon</topic><topic>Carbon black</topic><topic>Charge transfer</topic><topic>Copper</topic><topic>Electrochemical analysis</topic><topic>Electrochemistry</topic><topic>Electrode materials</topic><topic>Electrodes</topic><topic>Energy storage</topic><topic>Engineering and Technology</topic><topic>Ethanol</topic><topic>Flowers</topic><topic>Graphene</topic><topic>Liquid 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One</addtitle><date>2022-01-01</date><risdate>2022</risdate><volume>17</volume><issue>6</issue><spage>e0269086</spage><epage>e0269086</epage><pages>e0269086-e0269086</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>Four types of flowerlike manganese dioxide in nano scale was synthesized via a liquid phase method in KMnO4-H2SO4 solution and Cu particles, wherein the effect of Cu particles was investigated in detail. The obtained manganese dioxide powder was characterized by XRD, SEM and TEM, and the supercapacity properties of MnO2 electrode materials were measured. The results showed that doping carbon black can benefit to better dispersion of copper particles, resulting in generated smaller size of Cu particles, and the morphology of MnO2 nanoparticles was dominated by that of Cu particles. The study of MnO2 synthesis by different sources of Cu particles showed that the size of MnO2 particles decreased significantly with freshly prepared fine copper powder compared with using commercial Cu powder, and the size of MnO2 particles can be further reduced to 120 nm by prepared Cu particles with smaller size. Therefore, it was suggested that the copper particles served as not only the reductant and but also the nuclei centre for the growth of MnO2 particles in synthesis process MnO2, and that is the reason how copper particles worked on the growth of flower-like MnO2 and electrochemical property. In the part of investigation for electrochemical property, the calculated results of b values indicated that the electrode materials have pseudo capacitance property, and the highest specific capacitance of 197.2 F g-1 at 2 mV s-1 and 148 F/g at 1 A/g were obtained for MCE electrode materials (MnO2 was synthesized with freshly prepared copper particles, where carbon black was used and dispersed in ethanol before preparation of Cu particles). The values of charge transfer resistance in all types of MnO2 materials electrodes were smaller than 0.08 Ω. The cycling retention of MCE material electrode is still kept as 93.8% after 1000 cycles.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>35653411</pmid><doi>10.1371/journal.pone.0269086</doi><orcidid>https://orcid.org/0000-0002-7116-0592</orcidid><orcidid>https://orcid.org/0000-0002-2849-8547</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Black carbon Capacitance Carbon Carbon black Charge transfer Copper Electrochemical analysis Electrochemistry Electrode materials Electrodes Energy storage Engineering and Technology Ethanol Flowers Graphene Liquid phases Manganese Manganese dioxide Metal oxides Morphology Nanocomposites Nanomaterials Nanoparticles Particle size Physical Sciences Potassium permanganate Powder Reducing agents Research and Analysis Methods Sulfuric acid Synthesis |
title | Synthesis of flower-like MnO2 nanostructure with freshly prepared Cu particles and electrochemical performance in supercapacitors |
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