Nowadays, CO2 capture and energy storage are two important application areas because of the environmental issues and the growing market in electronic devices. Porous carbon materials have great potential toward these areas, which are attributed to their high porosity, large surface area, and good electrical conductivity. However, currently developed carbon materials still have several limitations or drawbacks, such as using non-renewable resources, complex and costly processing and lack of adjustable structure. In this work, 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized cellulose nanofibers, which can be isolated from various renewable resources, and currently under-utilized lignin, which is a primary byproduct of pulp and paper industry, are used as precursor materials to develop a new type of multifunctional carbon aerogels with an adjustable, anisotropic pore structure. By carefully tuning the weight ratio of lignin to cellulose nanofibers in the precursors, the porosity and surface area of the carbon aerogels can be controlled, resulting in different CO2 adsorption and electrochemical properties. The best results are achieved by the carbon aerogel derived from the precursor with 12 wt% of TEMPO-oxidized cellulose nanofibers, which shows 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 when assembled in a two-electrode setup and tested at a current density of 0.2 A g-1. This indicates that the developed carbon aerogels have great potential in the sustainable, next-generation relevant application

Hierarchical anisotropic carbon aerogels derived from lignin and cellulose nanofibers toward CO2 capture and energy storage applications

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.