The F-doped O3-type NaNi1/3Fe1/3Mn1/3O2-xFx （x = 0, 0.005, 0.01,002 and noted as NFM-F0, NFM-F0.005, NFM-F0.01, NFM-F0.02, respectively, united as NFM-Fs） cathode materials were investigated systematically. The rate...The F-doped O3-type NaNi1/3Fe1/3Mn1/3O2-xFx （x = 0, 0.005, 0.01,002 and noted as NFM-F0, NFM-F0.005, NFM-F0.01, NFM-F0.02, respectively, united as NFM-Fs） cathode materials were investigated systematically. The rate performance and capacity retention of the O3-type cathode materials are significantly improved as a function of specific F-doping levels. Optimum performance is achieved in the NFM-F0.01 material having a capacity of -110mAhg-1 at a current density of 150mAg-1 after 70 cycles. The results indicate that the binding energy of oxygen changes as a result of F-doping, and in addition, F-doping results in changes to the stoichiometry of Mn3＋/Mn4＋, which stabilizes the O3-type layered structure, thus allowing cycling performance to be improved. However, NFM-F0.02, having a higher F-doping level, retains a high capacity retention, although a slight loss is observed. The results suggest there is an optimum F-doping level for the NFM-F system to deliver enhanced cycling performance.展开更多
Graphene oxide(GO)has demonstrated potential applications in various fields,and attracted intensive attention in industry as well.Numerous companies worldwide have been working on the industrial applications of GO-bas...Graphene oxide(GO)has demonstrated potential applications in various fields,and attracted intensive attention in industry as well.Numerous companies worldwide have been working on the industrial applications of GO-based materials in,e.g.,thermal management,multifunctional composites,anti-corrosion paints,lubricants,energy storage,environment protection and biomedicals.This review presents a short summary on the proceedings of GO towards industrialization,including the large-scale production and some promising applications,by providing views on the processing strategies and challenges specifically for the industrial use of GO.This review would help the scientists in this area to find topics for overcoming challenges together with engineers.展开更多
基金supported by the National High-Tech R&D Program of China (2015AA034601, 2016YFB010030X, and 2016YFB0700600)the State Key Laboratory of Materials Processing and Die & Mould Technologythe Analytical and Testing Center of Huazhong University of Science Technology
文摘The F-doped O3-type NaNi1/3Fe1/3Mn1/3O2-xFx （x = 0, 0.005, 0.01,002 and noted as NFM-F0, NFM-F0.005, NFM-F0.01, NFM-F0.02, respectively, united as NFM-Fs） cathode materials were investigated systematically. The rate performance and capacity retention of the O3-type cathode materials are significantly improved as a function of specific F-doping levels. Optimum performance is achieved in the NFM-F0.01 material having a capacity of -110mAhg-1 at a current density of 150mAg-1 after 70 cycles. The results indicate that the binding energy of oxygen changes as a result of F-doping, and in addition, F-doping results in changes to the stoichiometry of Mn3＋/Mn4＋, which stabilizes the O3-type layered structure, thus allowing cycling performance to be improved. However, NFM-F0.02, having a higher F-doping level, retains a high capacity retention, although a slight loss is observed. The results suggest there is an optimum F-doping level for the NFM-F system to deliver enhanced cycling performance.
基金This work was supported by the National Natural Science Foundation of China(51772282).
文摘Graphene oxide(GO)has demonstrated potential applications in various fields,and attracted intensive attention in industry as well.Numerous companies worldwide have been working on the industrial applications of GO-based materials in,e.g.,thermal management,multifunctional composites,anti-corrosion paints,lubricants,energy storage,environment protection and biomedicals.This review presents a short summary on the proceedings of GO towards industrialization,including the large-scale production and some promising applications,by providing views on the processing strategies and challenges specifically for the industrial use of GO.This review would help the scientists in this area to find topics for overcoming challenges together with engineers.
