Hierarchical Hollow Co/N-C@NiCo2O4 Microsphere as an Efficient Bi-functional Electrocatalyst for Rechargeable Zn–Air Battery
Zn–air batteries (ZABs) have drawn extensive attention for portable and wearable electronic devices owing to their high theoretical specific energy density and low cost. However, due to the dense packing under high mass loading, the mass/charge diffusion is seriously hindered, making their practical...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-10-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fmats.2019.00261/full |
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| author | Yuke Song Wenfu Xie Shijin Li Jian Guo Mingfei Shao |
| author_facet | Yuke Song Wenfu Xie Shijin Li Jian Guo Mingfei Shao |
| author_sort | Yuke Song |
| collection | DOAJ |
| description | Zn–air batteries (ZABs) have drawn extensive attention for portable and wearable electronic devices owing to their high theoretical specific energy density and low cost. However, due to the dense packing under high mass loading, the mass/charge diffusion is seriously hindered, making their practical performance with high power density, and energy density difficult to sustain. Herein, we reported an efficient bi-functional electrocatalyst of Ni-Co mixed metal oxides incorporated with cobalt/nitrogen-doped carbon with hierarchical hollow nanostructure (H-Co/N-C@NiCo2O4). Benefiting from the advantages of this structure and composition, the H-Co/N-C@NiCo2O4 exhibits superior electrocatalytic activity and long-time durability for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The potential gap between half-wave potential in ORR and overpotential at a current density of 10 mA cm−2 in OER reaches 0.8 V, much smaller than that of most reported bi-functional electrocatalysts. Moreover, H-Co/N-C@NiCo2O4 is constructed as an air electrode for rechargeable ZAB, delivering a high power density and long cycling stability. The good linear relationship between the power density and various mass loading of H-Co/N-C@NiCo2O4 on the electrode demonstrates that the performance has been well-maintained even under high dense packing of catalysts, which offers a new pathway for the practical applications in ZAB. |
| first_indexed | 2024-12-22T09:06:40Z |
| format | Article |
| id | doaj.art-a726cbfd3f9e49a39ab29678872ed3cf |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-12-22T09:06:40Z |
| publishDate | 2019-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-a726cbfd3f9e49a39ab29678872ed3cf2022-12-21T18:31:35ZengFrontiers Media S.A.Frontiers in Materials2296-80162019-10-01610.3389/fmats.2019.00261492217Hierarchical Hollow Co/N-C@NiCo2O4 Microsphere as an Efficient Bi-functional Electrocatalyst for Rechargeable Zn–Air BatteryYuke SongWenfu XieShijin LiJian GuoMingfei ShaoZn–air batteries (ZABs) have drawn extensive attention for portable and wearable electronic devices owing to their high theoretical specific energy density and low cost. However, due to the dense packing under high mass loading, the mass/charge diffusion is seriously hindered, making their practical performance with high power density, and energy density difficult to sustain. Herein, we reported an efficient bi-functional electrocatalyst of Ni-Co mixed metal oxides incorporated with cobalt/nitrogen-doped carbon with hierarchical hollow nanostructure (H-Co/N-C@NiCo2O4). Benefiting from the advantages of this structure and composition, the H-Co/N-C@NiCo2O4 exhibits superior electrocatalytic activity and long-time durability for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The potential gap between half-wave potential in ORR and overpotential at a current density of 10 mA cm−2 in OER reaches 0.8 V, much smaller than that of most reported bi-functional electrocatalysts. Moreover, H-Co/N-C@NiCo2O4 is constructed as an air electrode for rechargeable ZAB, delivering a high power density and long cycling stability. The good linear relationship between the power density and various mass loading of H-Co/N-C@NiCo2O4 on the electrode demonstrates that the performance has been well-maintained even under high dense packing of catalysts, which offers a new pathway for the practical applications in ZAB.https://www.frontiersin.org/article/10.3389/fmats.2019.00261/fullbi-functional electrocatalystORR and OERsynergetic effecthierarchical hollow nanostructurezinc–air battery |
| spellingShingle | Yuke Song Wenfu Xie Shijin Li Jian Guo Mingfei Shao Hierarchical Hollow Co/N-C@NiCo2O4 Microsphere as an Efficient Bi-functional Electrocatalyst for Rechargeable Zn–Air Battery Frontiers in Materials bi-functional electrocatalyst ORR and OER synergetic effect hierarchical hollow nanostructure zinc–air battery |
| title | Hierarchical Hollow Co/N-C@NiCo2O4 Microsphere as an Efficient Bi-functional Electrocatalyst for Rechargeable Zn–Air Battery |
| title_full | Hierarchical Hollow Co/N-C@NiCo2O4 Microsphere as an Efficient Bi-functional Electrocatalyst for Rechargeable Zn–Air Battery |
| title_fullStr | Hierarchical Hollow Co/N-C@NiCo2O4 Microsphere as an Efficient Bi-functional Electrocatalyst for Rechargeable Zn–Air Battery |
| title_full_unstemmed | Hierarchical Hollow Co/N-C@NiCo2O4 Microsphere as an Efficient Bi-functional Electrocatalyst for Rechargeable Zn–Air Battery |
| title_short | Hierarchical Hollow Co/N-C@NiCo2O4 Microsphere as an Efficient Bi-functional Electrocatalyst for Rechargeable Zn–Air Battery |
| title_sort | hierarchical hollow co n c nico2o4 microsphere as an efficient bi functional electrocatalyst for rechargeable zn air battery |
| topic | bi-functional electrocatalyst ORR and OER synergetic effect hierarchical hollow nanostructure zinc–air battery |
| url | https://www.frontiersin.org/article/10.3389/fmats.2019.00261/full |
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