@Article{jrm.2023.027163,
AUTHOR = {Jianping Deng, Qianqian Zhang, Yuling Lan, Lingcong Luo, Zimin Dai, Zhonghang Lin, Zhixin Lu, Jiancheng Yuan, Yiqi Fu, Lu Luo, Weigang Zhao},
TITLE = {Two-Step Preparation of Hierarchical Porous Carbon Materials Derived from Tannin for Use as an Electrode Material for Supercapacitors},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {11},
YEAR = {2023},
NUMBER = {6},
PAGES = {2631--2646},
URL = {http://www.techscience.com/jrm/v11n6/52267},
ISSN = {2164-6341},
ABSTRACT = {The development and utilization of biomass and agroforestry processing byproducts for high-value applications
have been an important topic in the field of renewable materials research. Based on this, a two-step microwave
hydrothermal pre-carbonization and KOH activation method was proposed to synthesize tannin-based activated
carbons with a high specific surface area, hierarchical pore structure, and good electrochemical performance. The
microstructure, texture properties, and physicochemical characteristics were investigated. The results show that
the prepared tannin-based activated carbons presented a hierarchical pore structure (micro- and mesopores) with
a specific surface area as high as 997.46 m3 g−1
. The electrochemical analysis shows that the tannin-based activated carbons have good wettability and charge transfer rates. Under the three-electrode system with 6 M
KOH as the electrolyte, the active material TAC600-4 had a maximum specific capacitance of 171 F g−1 at
0.5 A g−1
. As the current density increases to 10 A g−1
, the specific capacitance can still be maintained at
149 F g−1
, indicating a good rate capability. Therefore, the specific surface area and pore size of tannin-based activated carbons can be effectively adjusted by the alkali/carbon ratio, making it a promising supercapacitor electrode material and providing a new method for the high-value development of tannins in the field of
electrochemical energy storage.},
DOI = {10.32604/jrm.2023.027163}
}