Controllable synthesis of nitrogen-doped porous carbon from metal-polluted miscanthus waste boosting for supercapacitors  

作　　者：Zuo Chen Man Zhang Yuchen Wang Zhiyu Yang Di Hu Yetao Tang Kai Yan 

机构地区：[1]Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology,School of Environmental Science and Engineering,Sun Yat-sen University,135 Xingang Xi Road,Guangzhou,510275,China

出　　处：《Green Energy & Environment》2021年第6期929-937,共9页绿色能源与环境（英文版）

基　　金：financial supports from KeyArea Research and Development Program of Guangdong Province(2019B110209003);Guangdong Basic and Applied Basic Research Foundation(2019B1515120058,2020A1515011149);National Key R&D Program of China(2018YFD0800700);National Ten Thousand Talent Plan,National Natural Science Foundation of China(21776324);the Fundamental Research Funds for the Central Universities(19lgzd25);Hundred Talent Plan(201602)from Sun Yatsen University。

摘　　要：High-value reclamation of metal-polluted plants involved in phytoremediation is a big challenge.In this study,nitrogen-doped nanoporous carbon with large specific area of 2359.1 m^(2)g^(-1) is facilely fabricated from metal-polluted miscanthus waste for efficient energy storage.The synergistic effect of KOH,urea and ammonia solution greatly improve the nitrogen quantity and surface area of the synthesized carbon.Electrodes fabricated with this carbon exhibit the excellent capacitance performance of 340.2 F g^(-1) at 0.5 A g^(-1) and a low combined resistance of 0.116Ω,which are competitive with most of previously reported carbon-based electrodes.In addition,the as-obtained carbon electrode shows a high specific capacitance retention of over 99.6%even after 5000 cycles.Furthermore,the symmetric supercapacitor fabricated using the synthesized carbon achieves a superior energy density of 25.3 Wh kg^(-1)(at 400 W kg^(-1))in 1 mol L^(-1) Na_(2)SO_(4)aqueous solution.This work provides an efficient route to upcycle metal-polluted plant waste for supercapacitor applications.

关 键 词：Metal-polluted miscanthus High-value reclamation Supercapacitor Nitrogen-doped porous carbon Stability Electrochemical performance 

分 类 号：TM53[电气工程—电器]