Abstract
Using first-principles simulations, we identify the microscopic origin of the nonlinear dielectric response and high energy density of polyvinylidene-fluoride-based polymers as a cooperative transition path that connects nonpolar and polar phases of the system. This path explores a complex torsional and rotational manifold and is thermodynamically and kinetically accessible at relatively low temperatures. Furthermore, the introduction of suitable copolymers significantly alters the energy barriers between phases providing tunability of both the energy density and the critical fields.
- Received 7 December 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.087802
© 2012 American Physical Society
Synopsis
Plastic Capacitors
Published 23 February 2012
Calculations show that combining polymers can improve their dielectic properties and reveal the atomic rearrangements that make this possible.
See more in Physics