Dresden 2026 – scientific programme
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FM: Fachverband Funktionsmaterialien
FM 19: Advanced Microscopy and Tomography for Functional Materials
FM 19.4: Talk
Thursday, March 12, 2026, 11:00–11:15, BEY/0E40
Multiscale characterization of porous carbon fibers — •Markus Löffler1, Mohsen Sadeghi Bogar2,3, Paul Bertram3,4, Jan Wolf2,3, Darius Pohl1, Thomas Behnisch2,3, Iris Kruppke3,4, Chokri Cherif3,4, Maik Gude2,3, and Bernd Rellinghaus1 — 1Dresden Center for Nanoanalysis (DCN), cfaed, TUD Dresden University of Technology (TUD), Dresden, Germany — 2Institute of Lightweight Engineering and Polymer Technology (ILK), TUD, Dresden, Germany — 3Research Center Carbon Fibers Saxony, TUD, Dresden, Germany — 4Institute of Textile Machinery and High Performance Material Technology (ITM), TUD, Dresden, Germany
Porous carbon fibers (PCF) are valued for structural energy storage because they combine low density, high thermal and electrical conductivity, low thermal expansion, strong mechanical properties, and a large specific surface area. Key pore features - volume, shape, and connectivity - determine their suitability for use as electrodes in batteries, supercapacitors, and as structural materials. A hierarchical pore structure with sizes from 2 nm to over 50 nm is desirable. These PCFs are made by wet-spinning polyacrylonitrile (PAN) with nanocellulose as a pore-forming additive, followed by electron beam irradiation, stabilization, and carbonization. To understand how processing affects pore development, fibers are analyzed at various stages and scales using submicro-XCT, FIB, SEM, and TEM. All fibers show a low density of large pores, while precursor and irradiated fibers also have a high density of nanoscale pores.
Keywords: carbon fiber; porous materials; multiscale; electron microscopy; x-ray tomography