Investigation of High Energy Density Anode Materials Based on Sio-Sncoc in Full Cell Configuration

Monday, May 12, 2014: 08:00
Bonnet Creek Ballroom I, Lobby Level (Hilton Orlando Bonnet Creek)


State-of-the-art lithium ion battery technology is being developed for large scale applications such as electric vehicles (EVs) and hybrid electric vehicles (HEVs). For this purpose, lithium ion batteries must have long term cycling performance with high capacity. The graphite which is currently used as an anode material has a capacity of about 372 mAhg-1 where lithium forms graphite intercalation compounds LiC6 with excellent reversibility. Ongoing research efforts have focused on utilizing various materials (oxides, alloys, tin, silicon) to increase battery capacity, cycle life, and charge-discharge rates. Attention has been recently given to the potential of metal oxide anodes for lithium-ion batteries because of their low price and their high theoretical capacities (more than 600 mAhg-1). However, these anode materials suffer from their poor cycleability due to the volume expansion of the lithiated material. New materials based on the mixture of MaOb oxides (M: Si, Sn, Mo, Ge) and SnxCoyCz alloys were prepared and tested as anodes for lithium batteries. In the MaOb - SnxCoyCz composite, SnxCoyCz will play the role of buffer for MaOb anode and improve its cyleability and MaOb will provide more capacity.  In full cell configuration, this study will focus on the cheapest SiO- SnxCoyCz system. We used ultra-high energy ball milling (UHEM) methods to prepare SiO-Sn30Co30C40 anode materials. This anode material is tested in full cell configuration using the 5V LiNi0.5Mn1.5O4 spinel, NMC and ANL-NMC materials.  The results of these investigations will be presented.

The submitted abstract has been created by UChicago Argonne, LLC, Operator of Argonne National Laboratory (“Argonne”). Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under Contract No. DE-AC02-06CH11357.