Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries
Tailoring the nanostructure and composition of transition metal nitrides is highly important for their use as potent low-cost electrocatalysts. Cobalt nitride (CoN) exhibits strong catalytic activity for oxygen evolution reaction (OER). However, its poor catalytic efficiency for oxygen reduction rea...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/138342 |
| _version_ | 1826120157856006144 |
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| author | Zhang, Yongqi Ouyang, Bo Long, Guankui Tan, Hua Wang, Zhe Zhang, Zheng Gao, Weibo Rawat, Rajdeep Singh Fan, Hong Jin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Zhang, Yongqi Ouyang, Bo Long, Guankui Tan, Hua Wang, Zhe Zhang, Zheng Gao, Weibo Rawat, Rajdeep Singh Fan, Hong Jin |
| author_sort | Zhang, Yongqi |
| collection | NTU |
| description | Tailoring the nanostructure and composition of transition metal nitrides is highly important for their use as potent low-cost electrocatalysts. Cobalt nitride (CoN) exhibits strong catalytic activity for oxygen evolution reaction (OER). However, its poor catalytic efficiency for oxygen reduction reaction (ORR) hinders its application in rechargeable zinc-air batteries (ZABs) as the air cathode. In this work, we deploy the effective strategy of Mn doping to improve both OER and ORR activity of CoN nanowires as the cathode material for ZAB. Theoretical calculation predicts that moderate Mn doping in cobalt nitride results in a downshift of the d-band center and reduces the adsorption energy of reaction intermediates. With ~10 at% Mn dopants, stronger catalysis activities for both OER and ORR are achieved compared to pure CoN nanowires. Subsequently, both aqueous and flexible quasi-solid-state ZABs are constructed using the Mn-doped CoN nanowires array as additive-free air cathode. Both types of devices present large open circuit potential, high power density and long-cycle stability. This work pushes forward the progress in developing cost-effective ZABs. |
| first_indexed | 2024-10-01T05:11:37Z |
| format | Journal Article |
| id | ntu-10356/138342 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:11:37Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1383422023-02-28T20:06:11Z Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries Zhang, Yongqi Ouyang, Bo Long, Guankui Tan, Hua Wang, Zhe Zhang, Zheng Gao, Weibo Rawat, Rajdeep Singh Fan, Hong Jin School of Physical and Mathematical Sciences Engineering::Materials Bifunctional Electrocatalyst Zn-air Battery Tailoring the nanostructure and composition of transition metal nitrides is highly important for their use as potent low-cost electrocatalysts. Cobalt nitride (CoN) exhibits strong catalytic activity for oxygen evolution reaction (OER). However, its poor catalytic efficiency for oxygen reduction reaction (ORR) hinders its application in rechargeable zinc-air batteries (ZABs) as the air cathode. In this work, we deploy the effective strategy of Mn doping to improve both OER and ORR activity of CoN nanowires as the cathode material for ZAB. Theoretical calculation predicts that moderate Mn doping in cobalt nitride results in a downshift of the d-band center and reduces the adsorption energy of reaction intermediates. With ~10 at% Mn dopants, stronger catalysis activities for both OER and ORR are achieved compared to pure CoN nanowires. Subsequently, both aqueous and flexible quasi-solid-state ZABs are constructed using the Mn-doped CoN nanowires array as additive-free air cathode. Both types of devices present large open circuit potential, high power density and long-cycle stability. This work pushes forward the progress in developing cost-effective ZABs. 2020-05-03T05:42:31Z 2020-05-03T05:42:31Z 2020 Journal Article Zhang, Y., Ouyang, B., Long, G., Tan, H., Wang, Z., Zhang, Z., ... Fan, H. J. (2020). Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries. Science China Chemistry. doi:10.1007/s11426-020-9739-2 0021-843X https://hdl.handle.net/10356/138342 10.1007/s11426-020-9739-2 en Science China Chemistry 10.21979/N9/7STU9Y © 2020 Science in China Press. All rights reserved. This paper was published in Science China Chemistry and is made available with permission of Science in China Press. The original publication is available at www.scichina.com and www.springerlink.com. application/pdf |
| spellingShingle | Engineering::Materials Bifunctional Electrocatalyst Zn-air Battery Zhang, Yongqi Ouyang, Bo Long, Guankui Tan, Hua Wang, Zhe Zhang, Zheng Gao, Weibo Rawat, Rajdeep Singh Fan, Hong Jin Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries |
| title | Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries |
| title_full | Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries |
| title_fullStr | Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries |
| title_full_unstemmed | Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries |
| title_short | Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries |
| title_sort | enhancing bifunctionality of con nanowires by mn doping for long lasting zn air batteries |
| topic | Engineering::Materials Bifunctional Electrocatalyst Zn-air Battery |
| url | https://hdl.handle.net/10356/138342 |
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