Preparation of carbon monoliths having tailored pore structure from porous polymer precursors
This work concerns preparing tailored porous carbon monoliths by pyrolyzing porous polymer precursors. Prior work in this laboratory (1) demonstrated that a low density (0.05 g/cm[sup 3]), high void fraction (97 vol%) carbon monolith could be prepared by pyrolyzing a porous poly(acrylonitrile) (PAN) precursor. A higher density, more robust carbon material is preferred for certain applications, such as electrodes for electrochemical devices. The present work demonstrates that porous carbon monoliths having mass density of 0.7 g/cm[sup 3] can be prepared from a porous PAN precursor if the pyrolysis is controlled carefully. The macropore structure of the carbon is adjusted by changing the pore structure of the PAN precursor, and the finer scale structure (such as the crystallite size L[sub c]) is adjusted by varying the pyrolysis or heat treatment temperature.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6568158
- Report Number(s):
- SAND-93-0825C; CONF-930615--1; ON: DE93011576
- Country of Publication:
- United States
- Language:
- English
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360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
CARBON
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DECOMPOSITION
ELEMENTS
HEAT TREATMENTS
MATERIALS
MICROSTRUCTURE
NITRILES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POROSITY
POROUS MATERIALS
PRECURSOR
PRODUCTION
PYROLYSIS
THERMOCHEMICAL PROCESSES