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In-situ enriching active sites on co-doped Fe-Co4N@N-C nanosheet array as air cathode for flexible rechargeable Zn-air batteries
Abstract
Abstract The sluggish oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) kinetics in air cathode severely refrain the development of the reversible Zn-air battery. Herein, we report the design and synthesis of co-doped Fe-Co4N@N-C nanosheet array derived from MOF precursor on carbon cloth as the dual-functional electrocatalyst to boost the reaction kinetics. The Fe, N co-doping significantly promotes the generation of abundant Pyridinic-N-M active sites for ORR due to the strong coordination effect between metal center and pyridinic nitrogen. The enriched Co3+ sites concurrently motivate the formation of targeted *OOH intermediates during OER with decreased charge transfer resistance. Such electrocatalyst therefore delivers high catalytic activity for both ORR and OER. When applied as air cathode for liquid Zn-air battery, the device exhibits a high specific energy density of 934 Wh kg−1 with excellent cycling stability, which is superior to the referenced Pt and Ru-based Zn-air batteries. Flexible solid-state Zn-air battery can also achieve a high volumetric power density of 72 mW cm-3 and good cycling durability under different bending states. This work gives a facile and cost-efficient strategy to construct bifunctional flexible electrode with enriched active sites for Zn-air batteries.
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Cites
Wang, X., Liu, J., Liu, Z., Wang, W., Luo, J., Han, X., Du, X., Qiao, S., & Yang, J. (2018) · Advanced Materials · doi:10.1002/adma.201800005 · Cited by 640
Cited by
Xu, Q., Zhang, J., Zhang, H., Zhang, L., Chen, L., Hu, Y., Jiang, H., & Li, C. (2021) · Energy & Environmental Science · doi:10.1039/d1ee02105b · Cited by 469
Self-citationRecent Advances in Non‐Noble Bifunctional Oxygen Electrocatalysts toward Large‐Scale Production
Zeng, K., Zheng, X., Li, C., Yan, J., Tian, J., Jin, C., Strasser, P., & Yang, R. (2020) · Advanced Functional Materials · doi:10.1002/adfm.202000503 · Cited by 365
Self-citationChen, Y., Hu, S., Nichols, F., Bridges, F., Kan, S., He, T., Zhang, Y., & Chen, S. (2020) · Journal of Materials Chemistry A · doi:10.1039/d0ta04633g · Cited by 127
Metadata
- Authors
- Xu, Q., Jiang, H., Li, Y., Liang, D., Hu, Y., & Li, C.
- Venue
- Applied Catalysis B: Environmental
- Publisher
- Elsevier BV
- Published
- 2019-11
- Volume
- 256
- Pages
- 117893
- ISSN
- 0926-3373 (ISSN-L)
- OpenAlex
- W2953245135
- Cited by
- 236
- References
- 1
- FWCI
- 7.63
- Type
- journal article
- Language
- en
- Open access
- closed
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- Xu, Q., Jiang, H., Li, Y., Liang, D., Hu, Y., & Li, C. (2019). In-situ enriching active sites on co-doped Fe-Co4N@N-C nanosheet array as air cathode for flexible rechargeable Zn-air batteries. Applied Catalysis B: Environmental. https://doi.org/10.1016/j.apcatb.2019.117893
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