Oxygen-Doped Carbon Nitride Tubes for Highly Stable Lithium–Sulfur Batteries
Ding L, Lu Q, Permana ADC, Oswald S, Hantusch M, Nielsch K, Mikhailova D (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 9
Article Number: 2001057
Journal Issue: 4
Abstract
Graphitic carbon nitride g-C3N4 (GCN) has attracted extensive attention for electrochemical energy storage and conversion due to its high surface area, metal-free characteristics, “earth-abundance,” and facile synthesis. Furthermore, GCN has been demonstrated to exhibit a chemical interaction with polysulfides because of functional pyridinic nitrogen atoms, thus representing promising properties for application in lithium–sulfur (Li–S) batteries. Herein, an oxygen-doped hexagonal tubular carbon nitride (O-TCN) is obtained through a simple hydrolysis and pyrolysis approach. The tubular structure favors electrolyte infiltration and accommodates the volume change of sulfur during the redox reaction. Moreover, O-TCN/S with a high content of pyridinic N of about 80 wt% as the sulfur host is beneficial for trapping various polysulfide intermediates via numerous strong N–Li chemical interactions, further facilitating the transformation from high-order polysulfides to low-order Li2S2 or Li2S. As a result, O-TCN delivers a high discharge capacity of 1281 mAh·g−1 at 0.05 C for the first cycle, and an excellent reversible capacity of 401 mAh g−1 after 1000 cycles at 0.5 C with an ultralow capacity decay of 0.064% per cycle, presenting a high sulfur utilization and capacity retention.
Involved external institutions
Germany (DE)How to cite
APA:
Ding, L., Lu, Q., Permana, A.D.C., Oswald, S., Hantusch, M., Nielsch, K., & Mikhailova, D. (2021). Oxygen-Doped Carbon Nitride Tubes for Highly Stable Lithium–Sulfur Batteries. Energy Technology, 9(4). https://doi.org/10.1002/ente.202001057
MLA:
Ding, Ling, et al. "Oxygen-Doped Carbon Nitride Tubes for Highly Stable Lithium–Sulfur Batteries." Energy Technology 9.4 (2021).
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