Tuesday, 21 June 2016
Riverside Center (Hyatt Regency)
Development of low cost, high energy, safe and long-life rechargeable battery technology is critical for widespread commercialization of smart grid and electric vehicle. Rechargeable lithium-ion batteries have been considered as most promising candidates as energy storage system for transportation, smart grids and stationary power. In this presentation, I will present our recent work on advanced Silicon(Si) and Tin(Sn) anode materials development for next generation rechargeable lithium-ion batteries: (1) The latest achievements and some ongoing work in silicon anode based high energy Li-ion battery through the collaboration with General Motors. More specifically, advanced Si electrodes have been developed by a simple flash heat treatment and sulfur-doped graphene wrapping technique which can efficiently accommodate Si volume expansion and demonstrate excellent electrochemical reversibility and cycling. (2) A novel and facile method was developed to synthesize a rod-on-sheet-like nanohybrid (denoted as SnS-SG), consisting of one-dimentional (1D) single-crystalline, orthorhombic tin sulfide (SnS) supported on two-dimentional (2D) sulfur-doped graphene. The SnS-SG nanohybrid exhibited a superior cycle stability over 1500 cycles with a high capacity retention of 85%, the longest demonstrated cyclability among numerous Sn-based anode materials reported so far in LIBs.