Effect of Sample Geometry on Graphitization of Polyacrylonitrile

• DOI: 10.1002/smll.202400301
• Publication Date: 2024-05-07T08:10:46Z
• Authors: Young Woo Hwang; Tae Joo Shin; Jae Hong Seo; Min Hyeok Kim; Won Jun Lee; Rodney S. Ruoff; Won Kyung Seong; Sun Hwa Lee
• Keywords: Polyacrylonitrile; Thermogravimetric analysis

In this study, it is analyzed how sample geometry (spheres, nanofibers, or films) influences the graphitization behavior of polyacrylonitrile (PAN) molecules. The chemical bonding and changes in composition these three geometries are studied at oxidation, carbonization, stages via scanning electron microscopy (SEM), situ thermogravimetric-infrared (TGA-IR) analysis, elemental Raman spectroscopy, X-ray photoelectron spectroscopy (XPS). influence molecular alignment on investigated using synchrotron wide-angle diffraction (WAXD) transmission (TEM). effects different draw rates during spinning explored detail.