Cucurbit[6]uril(CB[6])and its complex with VO^(2+)(CB[6]VO)were intercalated into lamellar vanadium pentoxide in several proportions,generating a series of hybrid pillarised intercalates in the form of xerogel films.T...Cucurbit[6]uril(CB[6])and its complex with VO^(2+)(CB[6]VO)were intercalated into lamellar vanadium pentoxide in several proportions,generating a series of hybrid pillarised intercalates in the form of xerogel films.These different vips dramatically affect Li^(+)insertion/expulsion from the composites during redox processes.Our results show that CB[6]has little effect or may even impair charge compensation by Li^(+),while CB[6]VO exerts the opposite effect,enhancing this process when compared to pure vanadium pentoxide.This is clear evidence that CB[6]binds these ions retaining them in the bulk structure,and when the oculi are blocked by VO^(2+)ions,the macrocycle acts as a non-coordinating pillar in the structure favoring ion traffic,and charge compensation processes become easier.Specific charge capacities for pure vanadium pentoxide,CB[6]and CB[6]VO intercalates correspond to 158,168 and 230 mA h g^(-1)respectively.展开更多
文摘Cucurbit[6]uril(CB[6])and its complex with VO^(2+)(CB[6]VO)were intercalated into lamellar vanadium pentoxide in several proportions,generating a series of hybrid pillarised intercalates in the form of xerogel films.These different vips dramatically affect Li^(+)insertion/expulsion from the composites during redox processes.Our results show that CB[6]has little effect or may even impair charge compensation by Li^(+),while CB[6]VO exerts the opposite effect,enhancing this process when compared to pure vanadium pentoxide.This is clear evidence that CB[6]binds these ions retaining them in the bulk structure,and when the oculi are blocked by VO^(2+)ions,the macrocycle acts as a non-coordinating pillar in the structure favoring ion traffic,and charge compensation processes become easier.Specific charge capacities for pure vanadium pentoxide,CB[6]and CB[6]VO intercalates correspond to 158,168 and 230 mA h g^(-1)respectively.
