MXene-derived TiO_(2)nanosheets/rGO heterostructures for superior sodium-ion storage  

作　　者：Baosong Li Dezhuang Ji Abdallah Kamal Hamouda Shaohong Luo 

机构地区：[1]Department of Aerospace Engineering,Khalifa University of Science and Technology,Abu Dhabi 127788,UAE [2]Department of Mechanical and Nuclear Engineering,Khalifa University of Science and Technology,Abu Dhabi 127788,UAE [3]Department of Biomedical Engineering,Khalifa University of Science and Technology,Abu Dhabi 127788,UAE

出　　处：《ChemPhysMater》2025年第1期48-55,共8页化学物理材料(英文)

摘　　要：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 TiO_(2)nanosheets derived from Ti_(3)C_(2)T_(x)MXene and reduced graphene oxide.This structure facilitates the formation of heterogeneous structures while establishing a conductive network.The restacking of porous TiO_(2)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.

关 键 词：Ti_(3)C_(2)T_(x)MXene Titanium dioxide SELF-ASSEMBLY HETEROSTRUCTURE Sodium-ion batteries 

分 类 号：TB3[一般工业技术—材料科学与工程]