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Metastable Rock Salt Oxide-Mediated Synthesis of High-Density Dual-Protected M@NC for Long-Life Rechargeable Zinc–Air Batteries with Record Power Density
Abstract
Creating high-density durable bifunctional active sites in an air electrode is essential but still challenging for a long-life rechargeable zinc–air battery with appealing power density. Herein, we discover a general strategy mediated by metastable rock salt oxides for achieving high-density well-defined transition-metal nanocrystals encapsulated in N-doped carbon shells (M@NC) which are anchored on a substrate by a porous carbon network as highly active and durable bifunctional catalytic sites. Small-size (15 ± 5 nm) well-dispersed Co 2 Fe 1 @NC in a high density (metal loading up to 54.0 wt %) offers the zinc–air battery a record power density of 423.7 mW cm –2 . The dual protection from the complete graphitic carbon shells and the anchoring of the outer carbon network make Co 2 Fe 1 @NC chemically and mechanically durable, giving the battery a long cycling life. Systematic in-situ temperature-dependent characterizations as well as DFT modeling rationalize the rock salt oxide-mediated process and its indispensable role in achieving high-density nanosized M@NC. These findings open up opportunities for designing efficient electrocatalysts for high-performance Zn–air batteries and diverse energy devices.
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Cited by
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Metadata
- Authors
- Tang, T., Jiang, W.-J., Liu, X.-Z., Deng, J., Niu, S., Wang, B., Jin, S.-F., Zhang, Q., Gu, L., Hu, J.-S., & Wan, L.-J.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2020-03-20
- Volume
- 142
- Issue
- 15
- Pages
- 7116-7127
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W3010823281
- Cited by
- 230
- References
- 4
- FWCI
- 6.70
- Type
- journal article
- Language
- en
- Open access
- closed
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- Tang, T., Jiang, W.-J., Liu, X.-Z., Deng, J., Niu, S., Wang, B., Jin, S.-F., Zhang, Q., Gu, L., Hu, J.-S., & Wan, L.-J. (2020). Metastable Rock Salt Oxide-Mediated Synthesis of High-Density Dual-Protected M@NC for Long-Life Rechargeable Zinc–Air Batteries with Record Power Density. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.0c01349
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