Lithium ion electrochemical insertion in vanadium pentoxide/cucurbit[6]uril intercalates
作者： Francisco de Araújo Silva , Fritz Huguenin , Silvânia Marilene de Lima , Grégoire Jean-François Demets
DOI: 10.1039/C4QI00069B
关键词: Lithium 、 Redox 、 Lamellar structure 、 Ion 、 Vanadium 、 Inorganic chemistry 、 Intercalation (chemistry) 、 Pentoxide 、 Chemistry 、 Crystallography 、 Electrochemistry
摘要: Cucurbit[6]uril (CB[6]) and its complex with VO2+ (CB[6]VO) were intercalated into lamellar vanadium pentoxide in several proportions, generating a series of hybrid pillarised intercalates the form xerogel films. These different guests dramatically affect Li+ insertion/expulsion from 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 opposite effect, enhancing this process when compared to pure pentoxide. This is clear evidence binds these ions retaining them bulk structure, oculi are blocked ions, macrocycle acts as non-coordinating pillar structure favoring ion traffic, processes become easier. Specific capacities for pentoxide, correspond 158, 168 230 mA h g−1 respectively.
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