TY - JOUR
T1 - A Promising Carbon/g-C3N4 Composite Negative Electrode for a Long-Life Sodium-Ion Battery
AU - Weng, Guo Ming
AU - Xie, Yu
AU - Wang, Hang
AU - Karpovich, Christopher
AU - Lipton, Jason
AU - Zhu, Junqing
AU - Kong, Jaemin
AU - Pfefferle, Lisa D.
AU - Taylor, André D.
N1 - Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/9/23
Y1 - 2019/9/23
N2 - 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.
AB - 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.
KW - 2D materials
KW - composites
KW - graphitic carbon nitride
KW - nanosheets
KW - sodium-ion batteries
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U2 - 10.1002/anie.201905803
DO - 10.1002/anie.201905803
M3 - Article
C2 - 31298771
AN - SCOPUS:85070752865
SN - 1433-7851
VL - 58
SP - 13727
EP - 13733
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 39
ER -