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, Andre 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)
JournalAngewandte Chemie - International Edition
DOIs
StateAccepted/In press - Jan 1 2019

Fingerprint

asphalt
Nanosheets
Carbon
Sodium
Ions
Electrodes
Diffusion barriers
Chemical stability
Composite materials
Heavy ions
Discrete Fourier transforms
Urea
Scalability
Costs
Multilayers
Carbon nitride
Asphalt
Heating
Low's mixture
cyanogen

Keywords

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

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

A Promising Carbon/g-C3N4 Composite Negative Electrode for a Long-Life Sodium-Ion Battery. / Weng, Guo Ming; Xie, Yu; Wang, Hang; Karpovich, Christopher; Lipton, Jason; Zhu, Junqing; Kong, Jaemin; Pfefferle, Lisa D.; Taylor, Andre.

In: Angewandte Chemie - International Edition, 01.01.2019.

Research output: Contribution to journalArticle

Weng, Guo Ming ; Xie, Yu ; Wang, Hang ; Karpovich, Christopher ; Lipton, Jason ; Zhu, Junqing ; Kong, Jaemin ; Pfefferle, Lisa D. ; Taylor, Andre. / A Promising Carbon/g-C3N4 Composite Negative Electrode for a Long-Life Sodium-Ion Battery. In: Angewandte Chemie - International Edition. 2019.
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