TY - JOUR

T1 - Detailed Morphology and Electron Transport in Reduced Graphene Oxide Filled Polymer Composites with a Segregated Structure

AU - Kuznetsov, Vitalii A.

AU - Gudkov, Maksim V.

AU - Ermakov, Vladimir A.

AU - Shiyanova, Kseniya A.

AU - Shestopalova, Lidiya V.

AU - Fedorov, Andrey A.

AU - Gerasimov, Evgeny Yu

AU - Suprun, Evgenii A.

N1 - The authors acknowledge the Ministry of Science and Higher Education of the Russian Federation, project N 121031700314-5 for electron transport measurements (NIIC SB RAS); projects N 122040400099-5 and 122040500058-1 for samples preparation (FRC CP RAS); project N FWUR-2024-0032 for electron microscopy characterization (BIC SB RAS); and for optical microscopy characterization (NSU). Electron microscopy studies were carried out using the facilities of the shared research center \u201CNational center of investigation of catalysts\u201D at the Boreskov Institute of Catalysis.

PY - 2024/3

Y1 - 2024/3

N2 - Polymer composites of a segregated network structure are dielectric polymer granules coated with electrically conductive nanoparticles at a low content, the quantity of the junctions between the granules determines the composites' mechanical properties, and the percolation network formed by the nanoparticles determines the electrical conductivity. Here, the morphology and electron-transport properties in reduced graphene oxide (rGO)-filled composites with a segregated structure based on polyvinyl chloride (PVC), poly(vinylidene fluoride-co-tetrafluoroethylene) (P(VDF-TFE)), and ultrahigh-molecular-weight polyethylene (UHMWPE) are studied. Optical and electron microscopies study of the microtome-formed cross sections have shown the morphology to be dependent on the polymer—the thinnest rGO layers are in UHMWPE-based composites, the thicker rGO layers are in PVC- and P(VDF-TFE)-based ones. The electrical conduction of the composites and the rGO-paper occurs through the same hopping conduction mechanisms within the wide temperature range, which allows to use the composites in applications where pure rGO is considered. Owing to thicker rGO layers open to the environment, PVC- and P(VDF-TFE)-based composites are more attractive, rather than the UHMWPE ones, in applications where layered materials are needed, for example, in lithium-ion batteries or supercapacitors. The UHMWPE-based composites look more promising as electrically conductive materials when mechanical strength is important.

AB - Polymer composites of a segregated network structure are dielectric polymer granules coated with electrically conductive nanoparticles at a low content, the quantity of the junctions between the granules determines the composites' mechanical properties, and the percolation network formed by the nanoparticles determines the electrical conductivity. Here, the morphology and electron-transport properties in reduced graphene oxide (rGO)-filled composites with a segregated structure based on polyvinyl chloride (PVC), poly(vinylidene fluoride-co-tetrafluoroethylene) (P(VDF-TFE)), and ultrahigh-molecular-weight polyethylene (UHMWPE) are studied. Optical and electron microscopies study of the microtome-formed cross sections have shown the morphology to be dependent on the polymer—the thinnest rGO layers are in UHMWPE-based composites, the thicker rGO layers are in PVC- and P(VDF-TFE)-based ones. The electrical conduction of the composites and the rGO-paper occurs through the same hopping conduction mechanisms within the wide temperature range, which allows to use the composites in applications where pure rGO is considered. Owing to thicker rGO layers open to the environment, PVC- and P(VDF-TFE)-based composites are more attractive, rather than the UHMWPE ones, in applications where layered materials are needed, for example, in lithium-ion batteries or supercapacitors. The UHMWPE-based composites look more promising as electrically conductive materials when mechanical strength is important.

KW - electron microscopy

KW - hopping conduction

KW - polymer composites

KW - reduced graphene oxide

KW - segregated structure

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85182418378&origin=inward&txGid=1e7cc559f7bf72366fb262eb6936063b

UR - https://www.mendeley.com/catalogue/9f486a32-6c13-31f9-b167-4ac20f85b7c9/

U2 - 10.1002/pssa.202300855

DO - 10.1002/pssa.202300855

M3 - Article

VL - 221

JO - Physica Status Solidi (A) Applications and Materials Science

JF - Physica Status Solidi (A) Applications and Materials Science

SN - 1862-6300

IS - 6

M1 - 2300855

ER -