title: Dopamine-Induced Formation of Ultrasmall Few-Layer MoS2Homogeneously Embedded in N-Doped Carbon Framework for Enhanced Lithium-Ion Storage.
abstract: Molybdenum disulfide with a layered structure and high theoretical capacity is attracting extensive attention for high-performance lithium-ion batteries. In this study, a simple and scalable method by freeze-drying of (NH4)2MoS4and dopamine mixed solutions along with subsequent calcination is developed to realize the self-assembly of hierarchical MoS2/carbon composite nanosheets via the effect of dopamine-induced morphology transformation, in which ultrasmall few-layer MoS2nanosheets were homogeneously embedded into a N-doped carbon framework (denoted as MoS2@N-CF). The embedded ultrasmall MoS2nanosheets (∼5 nm in length) in the composites consist of less than five layers with an expanded interlayer spacing of the (002) plane. When tested as anode materials for rechargeable Li-ion batteries, the obtained MoS2@N-CF nanosheets exhibit outstanding electrochemical performance in terms of high specific capacity (839.2 mAh g-1at 1 A g-1), high initial Coulombic efficiency (85.2%), and superior rate performance (702.1 mAh g-1at 4 A g-1). Such intriguing electrochemical performance was attributed to the synergistic effect of uniform dispersion of few-layer MoS2into the carbon framework, expanded interlayer spacing, and enhanced electronic conductivity in the unique hierarchical architecture. This work provides a simple and effective strategy for the uniform integration of MoS2with carbonaceous materials to significantly boost their electrochemical performance.
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, People's Republic of China.|MOE Key Laboratory of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, People's Republic of China.
authors.forename: Zhao-Hua
authors.initials: ZH
authors.lastname: Miao
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, People's Republic of China.|MOE Key Laboratory of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, People's Republic of China.
authors.forename: Pan-Pan
authors.initials: PP
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, People's Republic of China.|MOE Key Laboratory of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, People's Republic of China.
authors.forename: Yu-Chen
authors.initials: YC
authors.lastname: Xiao
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, People's Republic of China.
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Fang
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, People's Republic of China.|MOE Key Laboratory of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, People's Republic of China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhen
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, People's Republic of China.|MOE Key Laboratory of Micro-System and Micro-Structures Manufacturing, Harbin Institute of Technology , Harbin 150080, People's Republic of China.
authors.forename: Cheng-Yan
authors.initials: CY
authors.lastname: Xu
keywords: carbon framework; dopamine; expanded interlayer; lithium-ion batteries; molybdenum disulfide