TY - JOUR
T1 - Heterostructured MXene and g-C3N4 for high-rate lithium intercalation
AU - Zhu, Yun Pei
AU - Lei, Yongjiu
AU - Ming, Fangwang
AU - Abou-Hamad, Edy
AU - Emwas, Abdul-Hamid M.
AU - Hedhili, Mohamed N.
AU - Alshareef, Husam N.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Research reported in this work was supported by King Abdullah University of Science and Technology (KAUST).
PY - 2019/8/16
Y1 - 2019/8/16
N2 - A critical limitation to conventional electrochemical double-layer capacitors is their low energy densities. This has triggered significant interest in developing new pseudocapacitive materials, which utilize faradaic mechanisms to increase their energy densities. In this work, graphitic carbon nitride (g-C3N4) and Ti3C2Tx MXene are hybridized to form a unique two-dimensional (2D) heterostructure, which delivers remarkable pseudocapacitive characteristics and robust stability towards lithium storage. Interestingly, the improved kinetics is reflected by insignificant influence of (dis)charge rates on the pseudocapacitance even when testing at a 120C rate, and small peak potential offsets at high scan rates, revealing that there are no significant diffusion limitations in the heterostructure. This unexpected fast kinetics is related to the intrinsic chemical and electronic coupling effects between g-C3N4 and MXene, which can synergistically improve both electron transfer and lithium diffusion kinetics compared to MXene itself.
AB - A critical limitation to conventional electrochemical double-layer capacitors is their low energy densities. This has triggered significant interest in developing new pseudocapacitive materials, which utilize faradaic mechanisms to increase their energy densities. In this work, graphitic carbon nitride (g-C3N4) and Ti3C2Tx MXene are hybridized to form a unique two-dimensional (2D) heterostructure, which delivers remarkable pseudocapacitive characteristics and robust stability towards lithium storage. Interestingly, the improved kinetics is reflected by insignificant influence of (dis)charge rates on the pseudocapacitance even when testing at a 120C rate, and small peak potential offsets at high scan rates, revealing that there are no significant diffusion limitations in the heterostructure. This unexpected fast kinetics is related to the intrinsic chemical and electronic coupling effects between g-C3N4 and MXene, which can synergistically improve both electron transfer and lithium diffusion kinetics compared to MXene itself.
UR - http://hdl.handle.net/10754/656748
UR - https://linkinghub.elsevier.com/retrieve/pii/S2211285519307372
UR - http://www.scopus.com/inward/record.url?scp=85070835407&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2019.104030
DO - 10.1016/j.nanoen.2019.104030
M3 - Article
SN - 2211-2855
VL - 65
SP - 104030
JO - Nano Energy
JF - Nano Energy
ER -