Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 23, Pages 9067-9073Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202000314
Keywords
2D films; carbon nitride; chemical vapor deposition; sodium-ion batteries; underpotential deposition
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Funding
- Excellent hundred program of Beihang University
- Max Planck Society
- National Key Research
- Alexander von Humboldt Foundation
- China Scholarship Council
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Efficient and low-cost anode materials for the sodium-ion battery are highly desired to enable more economic energy storage. Effects on an ultrathin carbon nitride film deposited on a copper metal electrode are presented. The combination of effects show an unusually high capacity to store sodium metal. The g-C3N4 film is as thin as 10 nm and can be fabricated by an efficient, facile, and general chemical-vapor deposition method. A high reversible capacity of formally up to 51 Ah g(-1) indicates that the Na is not only stored in the carbon nitride as such, but that carbon nitride activates also the metal for reversible Na-deposition, while forming at the same time an solid electrolyte interface layer avoiding direct contact of the metallic phase with the liquid electrolyte.
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