Abstract
A facile synthesis strategy for lignin-derived three-dimensional hierarchical porous carbon (LHPC) was developed in this work. The LHPC was synthesized by a one-step carbonization-activation process using lignin as a carbon precursor and wet KOH as an in situ chemical activation agent. Compared with dry KOH activation agent, the wet KOH shows exfoliation effect on assisting the formation of hierarchical porous structure of LHPC. The H2O plays a key role of an exfoliation agent in forming the hierarchical porous structure of LHPC. The as-prepared LHPC shows a high specific surface area of 2109 m2 g−1 and hierarchical pores. When used as an electrode material for supercapacitor, the LHPC exhibits excellent electrochemical performances, including a high capacitance of 254 F g−1 at 0.5 A g−1 and excellent rate capability with 59% capacitance retention at 20 A g−1. This study offers a convenient and practical approach to produce a high-rate hierarchical porous carbon material for supercapacitors.
| Original language | English (US) |
|---|---|
| Journal | Journal of Materials Science: Materials in Electronics |
| DOIs | |
| State | Published - Feb 18 2021 |
Bibliographical note
KAUST Repository Item: Exported on 2021-03-01Acknowledgements: The financial support was received from the Thirteen Fifth Science and Technology Project of the Ministry of Education of Jilin Province (No. JJKH20181293KJ) and the Natural Science Foundation of China (No. 21975101) is gratefully acknowledged. Wenli Zhang acknowledges the start-up funding of Guangdong University of Technology (GDUT) and financial support from the Research and Development Program in Key Fields of Guangdong Province (2020B1111380002).