Chemical Control of Plastic Crystals for Tunable Thermal Energy Storage 21-000000546
Abstract
We propose to identify and quantify chemical degrees of control in tunable condensed phase thermal energy storage materials and to e,xplore materials dependencies on the dynamics of the tuning and the energy storage processes. The overarching objective is to develo,p reversible endothermic condensed phase transitions (solid/solid or solid/liquid) that have dynamically tunable critical transition, temperatures, as the basis for responsive and tunable thermal energy storage media. This task will focus primarily on understanding, intrinsic chemical degrees of control for three interdependent performance metrics of energy storage materials: (i) the entropy and, enthalpy of the phase transformation, (ii) dTcr/dP, the sensitivity of the critical temperature to external pressure, and (iii) the, time scale associated with the dynamic tuning of the material. We will focus on plastic crystals that are known to have relatively,large enthalpies and dTcr/dP as model systems, and will focus on three distinctive mechanisms which we anticipate will impact both t,he change in rotational degrees of freedom and the volume change associated with the plastic crystal. Finally, we will validate the,utility of these systems and energy and power density scaling relationships in a prototype energy storage module. The anticipated ou,tcome of these tasks is an approach to design tunable thermal energy storage materials at the molecular level, as well as a validati,on of their utility as energy storage media.Approved for Public Release.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 08, 2022
- Source ID
- N000142212050
Entities
People
- Patrick Shamberger
Organizations
- Office of Naval Research
- Texas Engineering Experiment Station
- United States Navy