A Promising Carbon/g-C3N4 Composite Negative Electrode for a Long-Life Sodium-Ion Battery

Guo Ming Weng, Yu Xie, Hang Wang, Christopher Karpovich, Jason Lipton, Junqing Zhu, Jaemin Kong, Lisa D. Pfefferle, André D. Taylor

Research output: Contribution to journalArticle

Abstract

2D graphitic carbon nitride (g-C3N4) nanosheets are a promising negative electrode candidate for sodium-ion batteries (NIBs) owing to its easy scalability, low cost, chemical stability, and potentially high rate capability. However, intrinsic g-C3N4 exhibits poor electronic conductivity, low reversible Na-storage capacity, and insufficient cyclability. DFT calculations suggest that this could be due to a large Na+ ion diffusion barrier in the innate g-C3N4 nanosheet. A facile one-pot heating of a mixture of low-cost urea and asphalt is strategically applied to yield stacked multilayer C/g-C3N4 composites with improved Na-storage capacity (about 2 times higher than that of g-C3N4, up to 254 mAh g−1), rate capability, and cyclability. A C/g-C3N4 sodium-ion full cell (in which sodium rhodizonate dibasic is used as the positive electrode) demonstrates high Coulombic efficiency (ca. 99.8 %) and a negligible capacity fading over 14 000 cycles at 1 A g−1.

Original languageEnglish (US)
Pages (from-to)13727-13733
Number of pages7
JournalAngewandte Chemie - International Edition
Volume58
Issue number39
DOIs
StatePublished - Sep 23 2019

Keywords

  • 2D materials
  • composites
  • graphitic carbon nitride
  • nanosheets
  • sodium-ion batteries

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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    Weng, G. M., Xie, Y., Wang, H., Karpovich, C., Lipton, J., Zhu, J., Kong, J., Pfefferle, L. D., & Taylor, A. D. (2019). A Promising Carbon/g-C3N4 Composite Negative Electrode for a Long-Life Sodium-Ion Battery. Angewandte Chemie - International Edition, 58(39), 13727-13733. https://doi.org/10.1002/anie.201905803