Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries
The rational design of highly-active and stable reversible oxygen electrocatalysts for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) plays a key role in rechargeable metal–air batteries, yet remains a great challenge. Herein, a novel dual-crosslinked hydrogel strat...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/141087 |
| _version_ | 1826126257717248000 |
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| author | Fu, Gengtao Liu, Yu Chen, Yifan Tang, Yawen Goodenough, John B. Lee, Jong-Min |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Fu, Gengtao Liu, Yu Chen, Yifan Tang, Yawen Goodenough, John B. Lee, Jong-Min |
| author_sort | Fu, Gengtao |
| collection | NTU |
| description | The rational design of highly-active and stable reversible oxygen electrocatalysts for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) plays a key role in rechargeable metal–air batteries, yet remains a great challenge. Herein, a novel dual-crosslinked hydrogel strategy is proposed to synthesize a new type of carbon aerogel that anchors the iron–cobalt (FeCo) particles as a bifunctional oxygen catalyst. The proposed hydrogel composed of an organic/inorganic network can be easily obtained by initiating sol–gel polymerization of cyanometalates, chitosan and graphene oxide. After pyrolysis, FeCo nanocrystals can be in situ uniformly immobilized within the N-doped “dual-network” carbon aerogels (FeCo/N-DNC) with a robust 3D porous framework. When used as an electrocatalyst, the newly developed FeCo/N-DNC aerogels exhibit a positive onset potential (0.89 V) and half-wave potential (0.81 V) for the ORR and a low overpotential (0.39 V) at 10 mA cm−2 for the OER, while presenting excellent electrochemical stability after being tested for 10 000 s. More importantly, the FeCo/N-DNC driven Zn–air battery reveals a smaller charge/discharge voltage gap, higher power/energy density and better cycling stability than the costlier Pt/C + RuO2 mixture catalyst. Our findings provide a facile and feasible synthetic strategy for obtaining highly active and stable electrocatalysts. |
| first_indexed | 2024-10-01T06:49:42Z |
| format | Journal Article |
| id | ntu-10356/141087 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:49:42Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1410872020-06-04T01:44:27Z Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries Fu, Gengtao Liu, Yu Chen, Yifan Tang, Yawen Goodenough, John B. Lee, Jong-Min School of Chemical and Biomedical Engineering Maritime Institute Engineering::Chemical engineering N-doped Zn–air Batteries The rational design of highly-active and stable reversible oxygen electrocatalysts for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) plays a key role in rechargeable metal–air batteries, yet remains a great challenge. Herein, a novel dual-crosslinked hydrogel strategy is proposed to synthesize a new type of carbon aerogel that anchors the iron–cobalt (FeCo) particles as a bifunctional oxygen catalyst. The proposed hydrogel composed of an organic/inorganic network can be easily obtained by initiating sol–gel polymerization of cyanometalates, chitosan and graphene oxide. After pyrolysis, FeCo nanocrystals can be in situ uniformly immobilized within the N-doped “dual-network” carbon aerogels (FeCo/N-DNC) with a robust 3D porous framework. When used as an electrocatalyst, the newly developed FeCo/N-DNC aerogels exhibit a positive onset potential (0.89 V) and half-wave potential (0.81 V) for the ORR and a low overpotential (0.39 V) at 10 mA cm−2 for the OER, while presenting excellent electrochemical stability after being tested for 10 000 s. More importantly, the FeCo/N-DNC driven Zn–air battery reveals a smaller charge/discharge voltage gap, higher power/energy density and better cycling stability than the costlier Pt/C + RuO2 mixture catalyst. Our findings provide a facile and feasible synthetic strategy for obtaining highly active and stable electrocatalysts. 2020-06-04T01:44:27Z 2020-06-04T01:44:27Z 2018 Journal Article Fu, G., Liu, Y., Chen, Y., Tang, Y., Goodenough, J. B., & Lee, J.-M. (2018). Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries. Nanoscale, 10(42), 19937-19944. doi:10.1039/c8nr05812a 2040-3364 https://hdl.handle.net/10356/141087 10.1039/c8nr05812a 30346015 2-s2.0-85056106387 42 10 19937 19944 en Nanoscale © 2018 The Royal Society of Chemistry. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering N-doped Zn–air Batteries Fu, Gengtao Liu, Yu Chen, Yifan Tang, Yawen Goodenough, John B. Lee, Jong-Min Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries |
| title | Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries |
| title_full | Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries |
| title_fullStr | Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries |
| title_full_unstemmed | Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries |
| title_short | Robust N-doped carbon aerogels strongly coupled with iron – cobalt particles as efficient bifunctional catalysts for rechargeable Zn – air batteries |
| title_sort | robust n doped carbon aerogels strongly coupled with iron cobalt particles as efficient bifunctional catalysts for rechargeable zn air batteries |
| topic | Engineering::Chemical engineering N-doped Zn–air Batteries |
| url | https://hdl.handle.net/10356/141087 |
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