Dense Carbon-Organic Framework Solids in High Energy Density
Abstract
Inspired by novel structures and properties of low Z extended solids found at extreme conditions, we propose a comprehensive research program aimed at development of multifunctional hybrid carbon/low-Z extended solids amenable to stabilization at ambient conditions via kinetic controlled processes in heterogeneous solid mixtures of low-dimensional carbons and low Z molecular solids. In recent years, a significant number of extended solids consisting of first- and second-row elements have been discovered by the application of high pressure and temperature. These dense covalent or ionic three-dimensional (3D) network structures exhibit unusual properties such as high energy density, extreme hardness, high second harmonic generation, and superconductivity. However, being synthesized at high PT, most of these materials transform back to their molecular states upon release of pressure, thus losing their novel properties. Therefore, to recover novel extended states at ambient conditions, new unconventional approaches are urgently sought. One of them put forward in this proposal is to combine these low-Z molecular solid s (H2, 02, N2, H2O, and CO2; referring to "organic") with low-dimensional carbons (OD fullerene, ID nanotubes, 2D graphene, and 3D low-density porous carbons; referring to LDCs) structures to tune the stability by kinetically controlled processes at heterogeneous solid interfaces. The proposed research will address fundamental scientific challenges required to controlling the structure, bonding, stability, and properties of dense soli d interfaces and its mediation to bulk hybrid extended structures amenable to low transition pressures and ambient stability. ¥ Can we engineer crystal structures and morphology of novel hybrid low-Z/LDC materials by controlling atomic-scale processes during the growth at heterogeneous low-Z/LDC interfaces to produce complex morphologies? ¥ Can we utilize dynamic strain to facilitate the interfacial bonding between two dissimilar lattices, stabilizing topologically distinct extended states of the low-Z elemental solids? ¥ Can we control the metastability and resulting properties of low-Z extended solids using LCDs and ultimately stabilize those hybrid low-Z/LDC structures at ambient conditions without losing their novel properties? We will employ state of the art dynamic-diamond anvil cell experiments coupled with time-resolved Raman and synchrotron X-ray characterization to probe metastable interfacial structures; exploit the presence of internal chemical pressure to lower the transition pressure; and produce dynamic shear to enhance the miscibility between two dislike solids. Through scientific discoveries and innovative materials design, the proposed study will develop dense carbon-organic frameworks (deCOF) or carbon/low Z extended structures with exceptional physical properties important for energy applications and amenable to stabilization at ambient conditions.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 11, 2018
- Source ID
- W911NF1710468
Entities
People
- Choong-Shik Yoo
Organizations
- Army Contracting Command
- United States Army
- Washington State University