Dandelion-shaped TiO2/multi-layer graphene composed of TiO2(B) fibrils and anatase TiO2 pappi utilizing triphase boundaries for lithium storage. Issue 22 (19th May 2016)

• Record Type: Journal Article
• Authors: Song, Weixin; Chen, Jun; Ji, Xiaobo; Zhang, Xuemei; Xie, Fang; Riley, D. Jason
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 22(2016)
• Page Start: 8762
• Page End: 8768
• Publication Date: 2016-05-19
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta02548j
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A dandelion-shaped TiO2 /few layer graphene composite presents ultrahigh electrochemical properties for Li storage due to the graphene boundary-involved triphase interfacial storage mechanism. Abstract : A three-dimensional dandelion-shaped TiO2 /multi-layer graphene compound (TiO2 /MLG) composed of TiO2 (B) fibrils and anatase pappus structures has been synthesized as a potential anode material for Li storage. Electron microscopy indicates that the composite contains triphase boundaries between anatase, TiO2 (B) and graphene, which are responsible for the enhancement of energy storage and the decrease of electrode polarization. Cyclic voltammetric investigations indicate that both Li + insertion and pseudocapacitance contribute to charge storage. Ultrahigh specific capacities of 243 and 182 mA h g −1 have been obtained at 0.1 and 1 A g −1, respectively. Moreover, the excellent capacity retention can reach 99.6% after 100 cycles with almost 100% coulombic efficiency at 0.1 A g −1 . The importance of the triphase boundary in enhancing the storage of charge and transport of Li + is demonstrated.