Multifunctional Carbon Aerogels with Hierarchical Anisotropic Structure Derived from Lignin and Cellulose Nanofibers for CO2 Capture and Energy Storage

Document identifier: oai:DiVA.org:ltu-77516
Access full text here:10.1021/acsami.9b19955
Keyword: Engineering and Technology, Carbon aerogels, Trä och bionanokompositer, Kemisk teknologi, Chemical Technology, Supercapacitors, CO2 capture, Cellulose nanofibers, Lignin, Kemiska processer, Industrial Biotechnology, Kemiteknik, Chemical Process Engineering, Chemical Engineering, Biomaterial, Industriell bioteknik, Teknik och teknologier, Bio Materials, Wood and Bionanocomposites
Publication year: 2020
Relevant Sustainable Development Goals (SDGs):
SDG 7 Affordable and clean energy
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

In current times, CO2 capture and light-weight energy storage are receiving significant attention and will be vital functions in next-generation materials. Porous carbonaceous materials have great potential in these areas, whereas most of the developed carbon materials still have significant limitations, such as non-renewable resources, complex and costly processing or the absence of tailorable structure. In this study, a new strategy is developed for using the currently under-utilized lignin and cellulose nanofibers, which can be extracted from renewable resources to produce high-performance multifunctional carbon aerogels with a tailorable, anisotropic pore structure. Both the macro- and microstructure of the carbon aerogels can be simultaneously controlled by discreetly tuning the weight ratio of lignin to cellulose nanofibers in the carbon aerogel precursors, which considerably influences their final porosity and surface area. The designed carbon aerogels demonstrate excellent performance in both CO2 capture and capacitive energy storage, and the best results exhibit a CO2 adsorption capacity of 5.23 mmol g-1 at 273 K and 100 kPa, and a specific electrical double layer capacitance of 124 F g-1 at a current density of 0.2 A g-1, indicating that they have great future potential in the relevant applications.

Authors

Shiyu Geng

Luleå tekniska universitet; Materialvetenskap
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Jiayuan Wei

Luleå tekniska universitet; Materialvetenskap
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Simon Jonasson

Luleå tekniska universitet; Materialvetenskap
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Jonas Hedlund

Luleå tekniska universitet; Kemiteknik
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Kristiina Oksman

Luleå tekniska universitet; Materialvetenskap; Fibre and Particle Engineering, University of Oulu. Mechanical & Industrial Engineering (MIE), University of Toronto
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