Nanoconic TiO2 hollow spheres: novel buffers architectured for high-capacity anode materials

作者：Lei, Jianfei; Li, Weishan^*; Li, Xiaoping; Cairns, Elton J

来源：Journal of Materials Chemistry, 2012, 22(41): 22022-22027.

DOI：10.1039/c2jm34332k

• Electrochemical test
• Hierarchical architectures
• High capacity anode
• High-capacity materials
• Lithium storage capacity
• Material components
• Spatial arrangements
• Transport dynamics

An attempt has been carried out here to use nanoconic TiO2 hollow spheres as buffers to accommodate the volume expansion of high-capacity materials. Based on the TiO2 hollow spheres, we tailor-designed a novel composite, in which the high Li -transport dynamics of titanate hollow spheres (TiO2) and the high capacity of tin oxide (SnO2) were intimately integrated into a hierarchical architecture of nanocones, while the unique spatial arrangement of the SnO2 component in the nano-cavities effectively accommodates the volume change during lithiation/de-lithiation, hence rendering the composite stable cycling life. Electrochemical tests revealed favorable performances of the composite SnO2-TiO2 nanocones in terms of enhanced lithium storage capacity, stable cycle life and improved rate performance compared with each material components.

• 出版日期2012-11-7
• 单位华南师范大学