title: Graphene Aerogels with Anchored Sub-Micrometer Mulberry-Like ZnO Particles for High-Rate and Long-Cycle Anode Materials in Lithium Ion Batteries.
abstract: Graphene aerogels (GAs) anchoring hierarchical, mulberry-like ZnO particles are fabricated in situ using a one-step solvothermal reaction. The resulting composites can function as anodes in lithium ion batteries, where they exhibit a high capacity and cyclic stability. The reversible capacities obtained are 365, 320, and 230 mA h g-1at current densities of 1, 2, and 10 A g-1. Their high reversible capacity is 445 mA h g-1at a current density of 1.6 A g-1; this value is maintained even after the 500th cycle, The excellent electrochemical performance is attributed to strong oxygen bridges between ZnO and graphene, where C-O-Zn linkages provide a good pathway for electron transport during charge/discharge cycles. Additionally, the hierarchical structure of the ZnO microballs suppresses stacking among the graphene layers, allowing the GAs to accelerate the transport of lithium ions. Furthermore, the GA framework enhances the electrical conductivity and buffer any volume expansion.
authors: State Key Laboratory of Urban Water Resource and Environment, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China.
authors: Lishuang
authors: L
authors: Fan
authors: School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China.
authors: Yu
authors: Y
authors: Zhang
authors: School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China.
authors: Qi
authors: Q
authors: Zhang
authors: School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China.
authors: Xian
authors: X
authors: Wu
authors: School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China.
authors: Junhan
authors: J
authors: Cheng
authors: State Key Laboratory of Urban Water Resource and Environment, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China. znqmww@163.com.
authors: Naiqing
authors: N
authors: Zhang
authors: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China.
authors: Yujie
authors: Y
authors: Feng
authors: State Key Laboratory of Urban Water Resource and Environment, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China. keningsunhit@126.com.
authors: Kening
authors: K
authors: Sun
keywords: electrode materials; energy materials; graphene aerogels; hierarchical structures; lithium ion batteries