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.
|Original language||English (US)|
|Journal||Colloids and Surfaces A: Physicochemical and Engineering Aspects|
|State||Published - Dec 29 2021|
Bibliographical noteKAUST Repository Item: Exported on 2022-01-19
Acknowledgements: The authors acknowledge the financial support from the National Natural Science Foundation of China (No. 22108044), the National Key Research and Development Plan (No. 2018YFB1501503), the Research and Development Program in Key Fields of Guangdong Province (No. 2020B1111380002), the Natural Science Foundation for Distinguished Young Scholars of Guangdong Province (No. 2019B151502038), the Hefei National Laboratory for Physical Sciences at the Microscale (KF2020106), the Foundation of State Key Laboratory of Bio-based Material and Green Papermaking (Shandong Academy of Sciences) (No. GZKF202105) and the financial support from the Guangdong Provincial Key Laboratory of Plant Resources Biorefinery (No. 2021GDKLPRB07).