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Nitrogen‐Doped Hierarchical Porous Carbon Framework Derived from Waste Pig Nails for High‐Performance Supercapacitors
Author(s) -
Zhou Yibei,
Ren Juan,
Xia Li,
Wu Huali,
Xie Fengyu,
Zheng Qiaoji,
Xu Chenggang,
Lin Dunmin
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700810
Subject(s) - supercapacitor , materials science , electrochemistry , electrolyte , chemical engineering , capacitance , specific surface area , carbon fibers , microstructure , porosity , nitrogen , power density , overpotential , electrode , composite material , chemistry , composite number , organic chemistry , catalysis , power (physics) , physics , quantum mechanics , engineering
In situ nitrogen‐doped hierarchical porous carbon was synthesized by using waste protein‐rich pig nails as precursors in a facile KOH activation method. The microstructure and electrochemical characteristics of the materials were investigated by tuning the amount of KOH. When the weight ratio of KOH to pig nails is 1 : 1, the obtained nitrogen‐doped hierarchical porous carbon (NHPC‐1) exhibits the largest specific surface area (2569 m 2 g −1 ) with interconnected porous network structure, which are beneficial to ion/electron storage and transfer. In addition, abundant nitrogen of 2.8 at % in the NHPC‐1 also contributes to the high electrochemical activity of the supercapacitor during the charging/discharging process. As a result, the NHPC‐1 electrode in the supercapacitor exhibits a high specific capacitance of 231 F g −1 at 1 A g −1 and superior retention of 98 % after 5000 cycles at 1 A g −1 in 6 M KOH electrolyte. Additionally, the assembled symmetric device based on NHPC‐1 exhibits a high energy density of 7 Wh kg −1 at a power density of 500 W kg −1 . Our study suggests that waste pig nails can act as low‐cost and renewable carbon precursors for high performance supercapacitor.