title: Solvothermally exfoliated fluorographene for high-performance lithium primary batteries.
abstract: High-quality fluorographene (FG) was prepared by solvothermal exfoliation of fluorinated graphite (F-graphite) through intercalation of acetonitrile and chloroform with low boiling points. High-yield production of FG was demonstrated by wrinkled few-layered structures with disordered edges and poor regularity along the stacking direction. X-ray photo electron spectroscopy (XPS) spectra indicated that the intercalation of chloroform led to the partial transformation from covalent C-F bonds to semi-ionic C-F bonds. A lithium primary battery (Li-battery) using a FG cathode exhibited a remarkable discharge rate performance because of good Li(+) diffusion and charge mobility through nanosheets. FG nanosheets exfoliated using chloroform showed a high specific capacity of 520 mA h g(-1) and a voltage platform of 2.18 V at a current density of 1 C, accompanied by a maximum power density of 4038 W kg(-1) at 3 C, which is almost four times higher than that of F-graphite. The results indicate that the solvothermal exfoliation using a low-boiling-point solvent is a facile, efficient and high-yield approach to prepare high-purity FG nanosheets for high-performance Li-batteries.
authors: School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, China. weifeng@tju.edu.cn.
authors: Chuanbin
authors: C
authors: Sun
authors: Yiyu
authors: Y
authors: Feng
authors: Yu
authors: Y
authors: Li
authors: Chengqun
authors: C
authors: Qin
authors: Qingqing
authors: Q
authors: Zhang
authors: Wei
authors: W
authors: Feng
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D002725:Chloroform / Q000737:chemistry; D011211:Electric Power Supplies; D004566:Electrodes; D005461:Fluorine / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008094:Lithium / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013696:Temperature
chemical_list: D000097:Acetonitriles; D007477:Ions; D012997:Solvents; D005461:Fluorine; D006108:Graphite; D002725:Chloroform; D008094:Lithium; C032159:acetonitrile