NiOOH was prepared by chemical oxidation of β Ni(OH) 2. The physical characteristics and the chemical composition of the product were characterized by XRD, TG/DTA and ICP measurements. β NiOOH and the mixed samples ...NiOOH was prepared by chemical oxidation of β Ni(OH) 2. The physical characteristics and the chemical composition of the product were characterized by XRD, TG/DTA and ICP measurements. β NiOOH and the mixed samples of β NiOOH with γ MnO 2 in different ratios were charged/discharged in constant current, the results show that the addition of γ MnO 2 improves the discharge voltage plateau of nickel electrode and the optimum ratio of γ MnO 2 in the electrode is 25%. The cut off voltage of nickel electrode should be above 0 V( vs .Hg/HgO).展开更多
Microstructure and property of sulfur/carbon black composites prepared by ball milling were studied.Sulfur/carbon black composites were obtained by melting the mixture of sulfur and carbon black in 155℃and dispersing...Microstructure and property of sulfur/carbon black composites prepared by ball milling were studied.Sulfur/carbon black composites were obtained by melting the mixture of sulfur and carbon black in 155℃and dispersing evenly in carbon black after hydrothermal reaction.Thus,its conductive properties were improved.Moreover,microstructure and property of honeycomb sulfur/carbon black/MoS_(2) prepared by hydrothermal method as a cathode material for lithium-sulfur batteries were studied.The initial discharge specific capacity of the material at 0.2 A/g current density is 838.495 mA·h/g,and the 55.14%after 100 weeks of cycling.It is indicated that MoS_(2) can not only combine with polysulfides through electrostatic action or the action of chemical bonds,but also honeycomb porous structure.MoS_(2) can fix polysulfides groups and prevent their shuttle.Therefore,the cycling performance of the battery is effectively improved.展开更多
文摘NiOOH was prepared by chemical oxidation of β Ni(OH) 2. The physical characteristics and the chemical composition of the product were characterized by XRD, TG/DTA and ICP measurements. β NiOOH and the mixed samples of β NiOOH with γ MnO 2 in different ratios were charged/discharged in constant current, the results show that the addition of γ MnO 2 improves the discharge voltage plateau of nickel electrode and the optimum ratio of γ MnO 2 in the electrode is 25%. The cut off voltage of nickel electrode should be above 0 V( vs .Hg/HgO).
文摘Microstructure and property of sulfur/carbon black composites prepared by ball milling were studied.Sulfur/carbon black composites were obtained by melting the mixture of sulfur and carbon black in 155℃and dispersing evenly in carbon black after hydrothermal reaction.Thus,its conductive properties were improved.Moreover,microstructure and property of honeycomb sulfur/carbon black/MoS_(2) prepared by hydrothermal method as a cathode material for lithium-sulfur batteries were studied.The initial discharge specific capacity of the material at 0.2 A/g current density is 838.495 mA·h/g,and the 55.14%after 100 weeks of cycling.It is indicated that MoS_(2) can not only combine with polysulfides through electrostatic action or the action of chemical bonds,but also honeycomb porous structure.MoS_(2) can fix polysulfides groups and prevent their shuttle.Therefore,the cycling performance of the battery is effectively improved.
