期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 4, 页码 5425-5438出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c22576
关键词
lignin; porous carbons; ammonia activation; activation mechanism; electrochemical capacitors
资金
- National Natural Science Foundation of China [22108044]
- Research and Development Program in Key Fields of Guangdong Province [2020B1111380002]
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery [2021GDKLPRB07]
- Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological Innovation
In this study, nitrogen-doped lignin-derived porous carbon (NLPC) was prepared as electrode materials for electrochemical capacitors (ECs) using enzymatic hydrolysis lignin. By comparing the surface capacitance with different electrolytes, it was found that NLPC significantly improved the energy density.
The low energy density and low cost performance of electrochemical capacitors (ECs) are the principal factors that limit the wide applications of ECs. In this work, we used enzymatic hydrolysis lignin as the carbon source and an ammonia activation methodology to prepare nitrogen-doped lignin-derived porous carbon (NLPC) electrode materials with high specific surface areas. We elucidated the free radical mechanism of ammonia activation and the relationship between nitrogen doping configurations, doping levels, and preparation temperatures. Furthermore, we assembled NLPC parallel to NLPC symmetric ECs and NLPC parallel to Zn asymmetric ECs using aqueous sulfate electrolytes. Compared with the ECs using KOH aqueous electrolyte, the energy densities of NLPC parallel to NLPC and NLPC parallel to Zn ECs were significantly improved. The divergence of charge storage characteristics in KOH, Na2SO4, and ZnSO4 electrolytes were compared by analyzing their area surface capacitance. This work provides a strategy for the sustainable preparation of lignin-derived porous carbons toward ECs with high energy densities.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据