Two-Dimensional SiOx As a High Performance Li Storage Material Prepared By Solution Evaporation Induced Interfacial Sol-Gel Reaction

Tuesday, 21 June 2016
Riverside Center (Hyatt Regency)
H. Yoo, E. Park, J. Bae, D. S. Kim (Hanyang University), J. Lee, M. S. Park (Korea Electronics Technology Institute), Y. N. Jo (Korea Electronic Technology Institute), J. H. Kim, S. X. Dou (University of Wollongong), Y. J. Kim (Korea Electronics Technology Institute), and H. Kim (Hanyang University)
Si based anode materials for lithium-ion batteries have gained much attention due to its high theoretical capacity (3,580 mAhg-1). However, Si anode materials have critical limit for their commercial use because of their poor cycle performance associated with severe volume changes during cycling. In this work, we synthesized a two-dimensional(2D) SiOx material by solution evaporation induced interfacial sol-gel reaction. This synthesis method is simple, cost-effective and scalable. The resulting 2D SiOx material showed stable cycle performance with reversible capacity of about 650 mAhg-1 even at a high current density of 50 C (50 A g-1). More detailed analysis of two-dimensional SiOx materials will be discussed in this presentation.