Give to WPI

Martin Bazant (MIT)-Nonequilibrium Thermodynamics of Li-ion Batteries

Mathematics - Colloquium

Friday, September 12, 2014
11:00 AM-12:00 PM

Stratton Hall

ABSTRACT: Li-ion batteries involve electrode materials, such as iron phosphate and graphite, which tend to separate into Li-rich and Li-poor phases upon intercalation of lithium. In nanoparticles, this bulk thermodynamic relaxation competes with surface electrochemistry, leading to the fundamental question: What is the reaction rate during a phase transformation? A consistent answer is provided by a theory of chemical thermodynamics that unifies and extends the Cahn-Hilliard and Allen-Cahn equations for chemical kinetics and charge transfer. The reaction rate depends on concentration gradients, elastic stress, and other non-idealities. Simulations based on the theory shed light on the complex nonlinear dynamics of ion intercalation and nucleation in battery nanoparticles and phase transformation dynamics in porous electrodes.

Suggested Audiences: Adult, College


Last Modified: September 4, 2014 at 9:07 AM

Powered by the Social Web - Bringing people together through Events, Places, & Common Interests

  • Email a Friend
  • Bookmark this Page
  • Share this Page