TY - JOUR
T1 - Rational design of carbon anodes by catalytic pyrolysis of graphitic carbon nitride for efficient storage of Na and K mobile ions
AU - Zhang, Wenli
AU - Sun, Minglei
AU - Yin, Jian
AU - Wang, Wenxi
AU - Huang, Gang
AU - Qiu, Xueqing
AU - Schwingenschlögl, Udo
AU - Alshareef, Husam N.
N1 - KAUST Repository Item: Exported on 2021-05-26
Acknowledgements: The research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). The authors acknowledge the financial support from the National Key Research and Development Plan (Grant NO. 2018YFB1501503), the National Natural Science Foundation of China (Grant NO. 22038004), the Research and Development Program in Key Fields of Guangdong Province (2020B1111380002). W.L.Z. acknowledges the start-up funding of Guangdong University of Technology (GDUT).
PY - 2021/5/24
Y1 - 2021/5/24
N2 - Sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) are potential cost-effective electrochemical energy storage devices for future grid-scale energy storage. However, the limited capacities of carbonaceous anodes hamper their development. Edge-nitrogen doping has been demonstrated as an effective strategy to enhance the reversible capacities of carbonaceous anodes. In this work, we demonstrate a general strategy to synthesize three-dimensional high edge-nitrogen doped turbostratic carbons (3D-ENTC) through catalytic pyrolysis of graphitic carbon nitride, which is enabled by metal cyanamides. 3D-ENTC exhibits a three-dimensional carbon nanosheet framework with a high edge-nitrogen doping level of 18.9 at% and a total nitrogen doping level of 21.2 at%. 3D-ENTC displays high capacities of 420 and 403 mAh g-1 at a current density of 50 mA g-1, high rate capabilities, and superior cycling stability when used as the anodes of PIBs and SIBs, respectively. The different charge storage mechanisms of 3D-ENTC as the anodes for PIBs and SIBs are elucidated by in situ electrochemical impedance spectroscopy. We find that 3D-ENTC stores Na+ ions mainly by adsorption, while 3D-ENTC stores K+ ions by adsorption and intercalation. This work opens a new avenue for designing high edge-nitrogen doped carbon anodes for SIBs and PIBs.
AB - Sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) are potential cost-effective electrochemical energy storage devices for future grid-scale energy storage. However, the limited capacities of carbonaceous anodes hamper their development. Edge-nitrogen doping has been demonstrated as an effective strategy to enhance the reversible capacities of carbonaceous anodes. In this work, we demonstrate a general strategy to synthesize three-dimensional high edge-nitrogen doped turbostratic carbons (3D-ENTC) through catalytic pyrolysis of graphitic carbon nitride, which is enabled by metal cyanamides. 3D-ENTC exhibits a three-dimensional carbon nanosheet framework with a high edge-nitrogen doping level of 18.9 at% and a total nitrogen doping level of 21.2 at%. 3D-ENTC displays high capacities of 420 and 403 mAh g-1 at a current density of 50 mA g-1, high rate capabilities, and superior cycling stability when used as the anodes of PIBs and SIBs, respectively. The different charge storage mechanisms of 3D-ENTC as the anodes for PIBs and SIBs are elucidated by in situ electrochemical impedance spectroscopy. We find that 3D-ENTC stores Na+ ions mainly by adsorption, while 3D-ENTC stores K+ ions by adsorption and intercalation. This work opens a new avenue for designing high edge-nitrogen doped carbon anodes for SIBs and PIBs.
UR - http://hdl.handle.net/10754/669240
UR - https://linkinghub.elsevier.com/retrieve/pii/S2211285521004407
U2 - 10.1016/j.nanoen.2021.106184
DO - 10.1016/j.nanoen.2021.106184
M3 - Article
SN - 2211-2855
SP - 106184
JO - Nano Energy
JF - Nano Energy
ER -
