Electrophoretic deposition in conjunction with electrochemical reduction was used to make flexible free-standing graphene-like films. Firstly, graphene oxide （GO） film was deposited on graphite substrate by electrophoretic deposition method, and then reduced by subsequent electrochemical reduction of GO to obtain reduced GO （ERGO） film with high electrochemical performance. The morphology, structure and electrochemical performance of the prepared graphene-like film were confirmed by SEM, XRD and FT-IR. These unique materials were found to provide high specific capacitance and good cycling stability. The high specific capacitance of 254 F/g was obtained from cyclic voltammetry measurement at a scan rate of 10 mV/s. When the current density increased to 83.3 A/g, the specific capacitance values still remained 132 F/g. Meanwhile, the high powder density of 39.1 kW/kg was measured at energy density of 11.8 W-h/kg in 1 mol/L H2SO4 solution. Furthermore, at a constant scan rate of 50 mV/s, 97.02% of its capacitance was retained for 1000 cycles. These promising results were attributed to the unique assembly structure of graphene film and low contact resistance, which indicated their potential application to electrochemical capacitors.
英国大学有着百年的人文和科学积淀,研究实力雄厚,大学科研组织管理具有严谨而又富有人性化的特点。以英国布里斯托大学(University of Bristol)为例,介绍化学实验室在风险评估、科研组织、大型设备培训和预约、实验室的管理和创新平台等方面的管理模式和运行机制,给我国高校科研实验室的建设与管理提供一些启发。从安全培训、设备共享模式、科研组织管理和协同创新中心建设等方面提出了几点建议。
