Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 636, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.128191
Keywords
Sodium lignosulfonate; Lignin; Porous carbon; Supercapacitors
Categories
Funding
- National Natural Science Foundation of China [22108044]
- National Key Research and Development Plan [2018YFB1501503]
- Research and Development Program in Key Fields of Guangdong Province [2020B1111380002]
- Natural Science Foundation for Distinguished Young Scholars of Guangdong Province [2019B151502038]
- Hefei National Laboratory for Physical Sciences at the Microscale [KF2020106]
- Foundation of State Key Laboratory of Bio-basedMaterial and Green Papermaking (Shandong Academy of Sciences) [GZKF202105]
- Guangdong Pro-vincial Key Laboratory of Plant Resources Biorefinery [2021GDKLPRB07]
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This study presents a novel approach for the synthesis of lignin-derived porous carbon materials using alkalized sodium lignosulfonate as a precursor. The introduction of alkaline metal ions in the precursor plays a crucial role as a template for the generation of porous carbon structures. This work provides a new paradigm for the transformation of lignin into porous carbon electrodes for future supercapacitor applications.
Commercial supercapacitors rely on expensive porous carbon electrode materials. Therefore, it is essential to search for low-cost porous carbon electrode materials for next-generation supercapacitors. In this work, we produced lignin-derived porous carbon from alkalized sodium lignosulfonate. The carboxyl and phenolic hydroxyl are bonded with potassium ions in alkalized sodium lignosulfonate molecules. As a result, the introduced potassium ions on carboxyl and phenolic hydroxyl groups and sodium ions on sulfonate groups act as the porogens for preparing porous carbons. The alkalized sodium lignosulfonate is pyrolysis carbonized to produce porous carbon materials for asymmetric and symmetric supercapacitors. Developed pores inside the lignin-derived porous carbons are generated from the self-template role of the generated inorganic metal carbonates and metal sulfates. The introduced alkali metal ions in alkalized sodium lignosulfonate play extra roles of templates. Our work made a new paradigm shift that lignin could be transformed into porous carbon electrodes through self-template methodologies for future supercapacitor applications.
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