TY - JOUR
T1 - MXene-derived TiO2 nanosheets/rGO heterostructures for superior sodium-ion storage
AU - Li, Baosong
AU - Ji, Dezhuang
AU - Hamouda, Abdallah Kamal
AU - Luo, Shaohong
N1 - Publisher Copyright:
© 2024
PY - 2024
Y1 - 2024
N2 - Transition metal oxides hold promise as electrode materials for energy-storage devices such as batteries and supercapacitors. However, achieving ideal electrode materials with high capacity, long-term cycling stability, and superb rate capability remains a challenge. In this study, we present a self-assembled heterogeneous structure consisting of TiO2 nanosheets derived from Ti3C2Tx MXene and reduced graphene oxide. This structure facilitates the formation of heterogeneous structures while establishing a conductive network. The restacking of porous TiO2 nanosheets and reduced graphene oxide within the heterostructure results in high porosity and excellent conductivity. Due to enhanced electron and Na+ transfer, as well as improved structural stability during the Na+ insertion/extraction process, this heterogeneous structure exhibited exceptional Na+ storage performance. Specifically, it exhibits a long-term cycling stability (217 mAh g−1 at 10 C, 5000 cycles) and an ultrahigh rate capability (135 mAh g–1, 40 C). Analysis of electrode reaction kinetics suggests that Na+ storage in the heterostructure is predominantly governed by a surface-controlled process. Our results provide a promising strategy for utilizing self-assembled heterostructures in advanced energy storage applications.
AB - Transition metal oxides hold promise as electrode materials for energy-storage devices such as batteries and supercapacitors. However, achieving ideal electrode materials with high capacity, long-term cycling stability, and superb rate capability remains a challenge. In this study, we present a self-assembled heterogeneous structure consisting of TiO2 nanosheets derived from Ti3C2Tx MXene and reduced graphene oxide. This structure facilitates the formation of heterogeneous structures while establishing a conductive network. The restacking of porous TiO2 nanosheets and reduced graphene oxide within the heterostructure results in high porosity and excellent conductivity. Due to enhanced electron and Na+ transfer, as well as improved structural stability during the Na+ insertion/extraction process, this heterogeneous structure exhibited exceptional Na+ storage performance. Specifically, it exhibits a long-term cycling stability (217 mAh g−1 at 10 C, 5000 cycles) and an ultrahigh rate capability (135 mAh g–1, 40 C). Analysis of electrode reaction kinetics suggests that Na+ storage in the heterostructure is predominantly governed by a surface-controlled process. Our results provide a promising strategy for utilizing self-assembled heterostructures in advanced energy storage applications.
KW - Heterostructure
KW - Self-assembly
KW - Sodium-ion batteries
KW - TiCT MXene
KW - Titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=85194538048&partnerID=8YFLogxK
U2 - 10.1016/j.chphma.2024.05.001
DO - 10.1016/j.chphma.2024.05.001
M3 - Article
AN - SCOPUS:85194538048
SN - 2772-5715
JO - ChemPhysMater
JF - ChemPhysMater
ER -