Energy Storage

Innovative Doped Cellulose Fibers as Precursors for Supercapacitor Carbon Electrode Materials

Saal B
Freitag, 13.09.2024, 09:50 - 10:15 Uhr

Doped cellulose solutions could be spun from H3PO4 solutions, incorporating heteroatom compounds and carbon nano-additives to tailor ACF properties, including surface chemistry, morphology, pore size distribution, and electrical conductivity. These fiber could be converted to highly porous functional carbon fibers in a two-step process combining chemical and physical activation. The prepared activated carbon fibers have very high surface areas and additional functionalities and show great potential for use as supercapacitor electrodes.

Sprecher
Simon JESTIN (CANOE - Le Centre Technologique Nouvelle Aquitaine Composites & Matériaux Avancés)
The surge in demand for sustainable energy conversion and storage solutions pushes the development of rechargeable electro-chemical devices. As part of the EMPHASIS project, which targets sustainable supercapacitor design for applications in electromobility and smart clothing requiring high energy/power densities, our research focuses on the development of bio-based activated carbons for supercapacitors. A distinctive strategy within EMPHASIS involves the creation of high-specific-surface-area activated carbons derived from novel bio-based precursors. Specifically, our approach leverages doped cellulose fibers as precursors for activated carbon fibers (ACF) manufacturing. CANOE, a French RTO, has developed an expertise in cellulose spinning from H3PO4 solutions and subsequent carbonization into fibers at both laboratory and semi-industrial scales. WOOD K PLUS, an Austrian RTO in biomass materials, performs the thermal-chemical conversion process to transform these fibers into microporous ACF. In the EMPHASIS project, CANOE undertakes the spinning of doped cellulose solutions, incorporating heteroatom compounds and carbon nano-additives to tailor ACF properties, including surface chemistry, morphology, pore size distribution, and electrical conductivity. The activation of bio-based carbon fibers occurs at WOOD K PLUS in a two-step process combining chemical and physical activation . Supercapacitor test cells incorporating these innovative ACF-based electrodes demonstrate remarkable capacities and cycle stability. This research received support from the European Union under Horizon Europe as part of the EMPHASIS Project (https://www.emphasis-supercaps.eu/) under Grant 101091997