Topic: Electrolyte and Electrolyte Additives for High Voltage NMC/Graphite Li-ion Batteries

Speaker: Jian Xia, Dalhousie University, Canada

Time: 2:30 p.m., June 2, 2016

Venue: Conference Room on the 2nd Floor, Building 8, SCUT North Campus

Abstract:

The development of high voltage Li-ion batteries is one of the best ways to increase their energy density.  However, this simple approach has proven to be difficult since electrolyte solvents and additives are unstable at high potentials and the parasitic degradation of these electrolyte components results in gas evolution, severe impedance growth, low coulombic efficiency and poor capacity retention.  Therefore, the development of high voltage electrolyte systems is one of the major bottlenecks in the path of lithium-ion cells with high energy density.

In this presentation, Dr. Xia will first introduce some advanced diagnostics they developed to study the impact of different electrolytes on cell performance when charged to high voltages. Then, he will introduce some new electrolyte systems and new additives we develop during the past a few years. These encouraging results provide hope to battery community in developing high energy density and long-life Li-ion cells.