title: Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe2O3/Graphene Hybrids for High-Performance Lithium-Ion Batteries.
abstract: A highly efficient and continuous high-pressure homogenization (HPH) approach is developed for scalable production of graphene sheets and sandwich-structured α-Fe2O3/graphene hybrids by liquid-phase exfoliation of stage-1 FeCl3-based graphite intercalation compounds (GICs). The enlarged interlayer spacing of FeCl3-GICs facilitates their efficient exfoliation to produce high-quality graphene sheets. Moreover, sandwich-structured α-Fe2O3/few-layer graphene (FLG) hybrids are readily fabricated by thermally annealing the FeCl3intercalated FLG sheets. As an anode material of Li-ion battery, α-Fe2O3/FLG hybrid shows a satisfactory long-term cycling performance with an excellent specific capacity of 1100.5 mA h g-1after 350 cycles at 200 mA g-1. A high reversible capacity of 658.5 mA h g-1is achieved after 200 cycles at 1 A g-1and maintained without notable decay. The satisfactory cycling stability and the outstanding capability of α-Fe2O3/FLG hybrid are attributed to its unique sandwiched structure consisting of highly conducting FLG sheets and covalently anchored α-Fe2O3particles. Therefore, the highly efficient and scalable preparation of high-quality graphene sheets along with the excellent electrochemical properties of α-Fe2O3/FLG hybrids makes the HPH approach promising for producing high-performance graphene-based energy storage materials.
authors.affiliation: Beijing Key Laboratory of Advanced Functional Polymer Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Qi
authors.affiliation: Beijing Key Laboratory of Advanced Functional Polymer Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Hao-Bin
authors.initials: HB
authors.lastname: Zhang
authors.affiliation: Institute for Superconducting and Electronic Materials, University of Wollongong , Wollongong, New South Wales 2500, Australia.
authors.forename: Jiantie
authors.initials: J
authors.lastname: Xu
authors.affiliation: Beijing Key Laboratory of Advanced Functional Polymer Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Wu
authors.affiliation: Beijing Key Laboratory of Advanced Functional Polymer Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Dongzhi
authors.initials: D
authors.lastname: Yang
authors.affiliation: Beijing Key Laboratory of Advanced Functional Polymer Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Jin
authors.identifier: http://orcid.org/0000-0001-8962-3260
authors.initials: J
authors.lastname: Qu
authors.affiliation: Beijing Key Laboratory of Advanced Functional Polymer Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Zhong-Zhen
authors.identifier: http://orcid.org/0000-0001-8357-3362
authors.initials: ZZ
authors.lastname: Yu
keywords: graphene hybrids; high-pressure homogenization; high-quality graphene; liquid-phase exfoliation; lithium-ion batteries