Carambola-shaped VO2 nanostructures: a binder-free air electrode for an aqueous Na-air battery
Binder-free and bifunctional electrocatalysts have vital roles in the development of high-performance metal-air batteries. Herein, we synthesized a vanadium oxide (VO2) nanostructure as a novel binder-free and bifunctional electrocatalyst for a rechargeable aqueous sodium-air (Na-air) battery. VO2 n...
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| Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2017, Vol.5 (5), p.2037-2044 |
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| container_issue | 5 |
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| container_title | Journal of materials chemistry. A, Materials for energy and sustainability |
| container_volume | 5 |
| creator | Khan, Ziyauddin Senthilkumar, Baskar Park, Sung O Park, Seungyoung Yang, Juchan Lee, Jeong Hyeon Song, Hyun-Kon Kim, Youngsik Kwak, Sang Kyu Ko, Hyunhyub |
| description | Binder-free and bifunctional electrocatalysts have vital roles in the development of high-performance metal-air batteries. Herein, we synthesized a vanadium oxide (VO2) nanostructure as a novel binder-free and bifunctional electrocatalyst for a rechargeable aqueous sodium-air (Na-air) battery. VO2 nanostructures were grown on reduced graphene oxide coated on carbon paper, which had a carambola morphology. We confirmed the bifunctional nature of VO2 nanostructures by analyzing their electrocatalytic activity associated with the oxygen reduction reaction and oxygen evolution reaction. The reaction pathway associated with electrocatalytic activity was also affirmed by computational modeling and simulation studies. Thereafter, an aqueous Na-air cell was built using novel binder-free VO2 nanostructures as the air electrode. The fabricated cell displayed a 0.64 V overpotential gap, 104 mW g-1 power density at 80 mA g-1 current density, 81% round trip efficiency and good cyclic stability up to 50 cycles. |
| doi_str_mv | 10.1039/c6ta09375b |
| format | Article |
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Herein, we synthesized a vanadium oxide (VO2) nanostructure as a novel binder-free and bifunctional electrocatalyst for a rechargeable aqueous sodium-air (Na-air) battery. VO2 nanostructures were grown on reduced graphene oxide coated on carbon paper, which had a carambola morphology. We confirmed the bifunctional nature of VO2 nanostructures by analyzing their electrocatalytic activity associated with the oxygen reduction reaction and oxygen evolution reaction. The reaction pathway associated with electrocatalytic activity was also affirmed by computational modeling and simulation studies. Thereafter, an aqueous Na-air cell was built using novel binder-free VO2 nanostructures as the air electrode. 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The fabricated cell displayed a 0.64 V overpotential gap, 104 mW g-1 power density at 80 mA g-1 current density, 81% round trip efficiency and good cyclic stability up to 50 cycles.</description><subject>Carbon</subject><subject>Current density</subject><subject>Electrocatalysts</subject><subject>Electrodes</subject><subject>Graphene</subject><subject>Nanostructure</subject><subject>Oxygen</subject><subject>Vanadium oxides</subject><issn>2050-7488</issn><issn>2050-7496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNjj1LA0EYhBdRMMQ0_oItbU73-8NOghohmEYtDe_uvqeRy13c3Sv89yYo1k4zAzMMDyHnnF1yJv1VNBWYl1aHIzIRTLPGKm-O_7Jzp2RWygfbyzFmvJ-Q1zlk2Iahg6a8ww4TfVkJ2kM_lJrHWMeM5ZoCDZs-YW7ajEhhkyl2GGseEtJ2yBR6Cp8jDmOhj9Ac-gC1Yv46IyctdAVnvz4lz3e3T_NFs1zdP8xvls2b1Kw2iTnJOYoIrbFKK4fahuC8iy4m1MjQYfA8eSFUVCIYljBYbzBZFZQBOSUXP7-7POxBSl1vNyVi10F_oFpz5xQX1lnxj6lxUjKmufwGc59l-g</recordid><startdate>2017</startdate><enddate>2017</enddate><creator>Khan, Ziyauddin</creator><creator>Senthilkumar, Baskar</creator><creator>Park, Sung O</creator><creator>Park, Seungyoung</creator><creator>Yang, Juchan</creator><creator>Lee, Jeong Hyeon</creator><creator>Song, Hyun-Kon</creator><creator>Kim, Youngsik</creator><creator>Kwak, Sang Kyu</creator><creator>Ko, Hyunhyub</creator><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7SP</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>2017</creationdate><title>Carambola-shaped VO2 nanostructures: a binder-free air electrode for an aqueous Na-air battery</title><author>Khan, Ziyauddin ; Senthilkumar, Baskar ; Park, Sung O ; Park, Seungyoung ; Yang, Juchan ; Lee, Jeong Hyeon ; Song, Hyun-Kon ; Kim, Youngsik ; Kwak, Sang Kyu ; Ko, Hyunhyub</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-g350t-d08311e2caf674548e57bb898c8cde5e0e8eb91d9224c42b60deb796ed74b46a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Carbon</topic><topic>Current density</topic><topic>Electrocatalysts</topic><topic>Electrodes</topic><topic>Graphene</topic><topic>Nanostructure</topic><topic>Oxygen</topic><topic>Vanadium oxides</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Khan, Ziyauddin</creatorcontrib><creatorcontrib>Senthilkumar, Baskar</creatorcontrib><creatorcontrib>Park, Sung O</creatorcontrib><creatorcontrib>Park, Seungyoung</creatorcontrib><creatorcontrib>Yang, Juchan</creatorcontrib><creatorcontrib>Lee, Jeong Hyeon</creatorcontrib><creatorcontrib>Song, Hyun-Kon</creatorcontrib><creatorcontrib>Kim, Youngsik</creatorcontrib><creatorcontrib>Kwak, Sang Kyu</creatorcontrib><creatorcontrib>Ko, Hyunhyub</creatorcontrib><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of materials chemistry. 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| identifier | ISSN: 2050-7488 |
| ispartof | Journal of materials chemistry. A, Materials for energy and sustainability, 2017, Vol.5 (5), p.2037-2044 |
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| language | eng |
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| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Carbon Current density Electrocatalysts Electrodes Graphene Nanostructure Oxygen Vanadium oxides |
| title | Carambola-shaped VO2 nanostructures: a binder-free air electrode for an aqueous Na-air battery |
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