1. Lamellar hierarchical lignin-derived porous carbon activating the capacitive property of polyaniline for high-performance supercapacitors.
- Author
-
Fu, Fangbao, Wang, Huan, Yang, Dongjie, Qiu, Xueqing, Li, Zhixian, and Qin, Yanlin
- Subjects
- *
POLYANILINES , *ACTIVATED carbon , *SUPERCAPACITORS , *LIGNIN structure , *CHARGE exchange , *HETEROGENOUS nucleation - Abstract
Synopsis: Lignin porous carbon/PANI composites were prepared via in- situ polymerization using lignin as carbon precursor. The PANI nanofibers interpenetrate the lamellar structure of lignin porous carbon, which endows high accessibility to ions and fast transfer for electrons, leading to the superior capacitance for the composite and the high energy density when assembled into supercapacitor. [Display omitted] Lignin porous carbons show good potential as carbon electrode materials for supercapacitors, but face the problem of low capacitance. Combining lignin porous carbons with polyaniline can achieve high capacitance. However, capacitance degradation resulting from the poor compatibility between lignin porous carbons and polyaniline has been the major obstacle for their application. In this work, three lignin porous carbons with different geometries were used as the hosts to anchor polyaniline for carbon/polyaniline composites via in- situ oxidative polymerization, and the compatibility between lignin porous carbons and polyaniline was investigated. It was determined the lamellar hierarchical lignin porous carbon with crumpled nanosheets can provide a large accessible surface area for the heterogeneous nucleation of aniline, which ensures uniform loading of interpenetrating polyaniline nanofibers. Benefiting from the interpenetrating conductive network and enhanced compatibility, the lamellar hierarchical porous carbon/polyaniline composite possesses a high capacitance of up to 643 F/g at 1.0 A/g and a sufficient capacitance of 390 F/g at 30.0 A/g. This work therefore provides design guidance for carbon hosts in high-performance supercapacitor composite electrodes. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF