title: Epitaxial Growth of Lattice-Mismatched Core-Shell TiO2 @MoS2 for Enhanced Lithium-Ion Storage.
abstract: Core-shell structured nanohybrids are currently of significant interest due to their synergetic properties and enhanced performances. However, the restriction of lattice mismatch remains a severe obstacle for heterogrowth of various core-shells with two distinct crystal structures. Herein, a controlled synthesis of lattice-mismatched core-shell TiO2 @MoS2 nano-onion heterostructures is successfully developed, using unilamellar Ti0.87 O2 nanosheets as the starting material and the subsequent epitaxial growth of MoS2 on TiO2 . The formation of these core-shell nano-onions is attributed to an amorphous layer-induced heterogrowth mechanism. The number of MoS2 layers can be well tuned from few to over ten layers, enabling layer-dependent synergistic effects. The core-shell TiO2 @MoS2 nano-onion heterostructures exhibit significantly enhanced energy storage performance as lithium-ion battery anodes. The approach has also been extended to other lattice-mismatched systems such as TiO2 @MoSe2 , thus suggesting a new strategy for the growth of well-designed lattice-mismatched core-shell structures.
authors.affiliation: Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai, 200433, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Dai
authors.affiliation: Department of Materials Science, Fudan University, Shanghai, 200433, China.
authors.forename: Anqi
authors.initials: A
authors.lastname: Zhang
authors.affiliation: Department of Materials Science, Fudan University, Shanghai, 200433, China.
authors.forename: Zhichang
authors.initials: Z
authors.lastname: Pan
authors.affiliation: Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Al-Enizi
authors.affiliation: Materials Science and Technology Program, College of Arts and Sciences, Qatar University, PO Box 2713, Doha, Qatar.
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Elzatahry
authors.affiliation: Department of Materials Science, Fudan University, Shanghai, 200433, China.
authors.forename: Linfeng
authors.initials: L
authors.lastname: Hu
authors.affiliation: Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai, 200433, China.
authors.forename: Gengfeng
authors.initials: G
authors.lastname: Zheng
keywords: amorphous layers; core-shell structures; lattice-mismatched; lithium storage; nano-onions