杂原子
超级电容器
炭黑
碳纤维
材料科学
纳米孔
电化学
分析化学(期刊)
核化学
电容
热解
纳米技术
化学工程
电极
化学
复合材料
有机化学
物理化学
复合数
工程类
天然橡胶
戒指(化学)
作者
Pengfei Hao,Yanjie Yi,Youming Li,Yi Hou
标识
DOI:10.1515/npprj-2021-0056
摘要
Abstract A green and economically viable route without any additional activation agents and templates has been developed to synthesize biomass-derived nanoporous carbon for superior electric double-layer capacitors via direct pyrolysis of dried black liquor powders, which is the main waste in pulping and paper-making industry. The resulting carbon materials present hierarchical porosity and moderate specific surface area of 1134 m 2 g − 1 {\text{m}^{2}}\hspace{0.1667em}{\text{g}^{-1}} , as well as multi-heteroatoms co-doping such as N, S, Na and K, which exist originally in black liquor. When evaluated as electrode materials for supercapacitors in 6 M KOH aqueous electrolyte, the-prepared carbon samples deliver a significantly high gravimetric capacitance of 331 F g − 1 \text{F}\hspace{0.1667em}{\text{g}^{-1}} at 0.5 A g − 1 \text{A}\hspace{0.1667em}{\text{g}^{-1}} in a three-electrode system. Moreover, the fabricated symmetric supercapacitor also possesses a gravimetric capacitance of 211 F g − 1 \text{F}\hspace{0.1667em}{\text{g}^{-1}} at 0.5 A g − 1 \text{A}\hspace{0.1667em}{\text{g}^{-1}} , with an impressive long-term cycling stability of 92 % capacitance retention after 3000 cycles. This work explores a suitable and scalable approach for mass production of high-performance electrode materials with industrial wastes on the base of cost-efficiency and environment-friendship.
科研通智能强力驱动
Strongly Powered by AbleSci AI