超级电容器
材料科学
电容
掺杂剂
碳纤维
化学工程
热解
去壳
氮气
电解质
电极
兴奋剂
化学
复合材料
有机化学
复合数
光电子学
植物
工程类
生物
物理化学
作者
Didi Xu,Youfeng Su,Shuping Zhang,Ya Xiong
标识
DOI:10.1080/15567036.2019.1604890
摘要
Porous N-doped carbons were successfully synthesized via a facile and eco-friendly nitrogen-doping route without N-containing chemical dopants, where bean dregs natural N dopant instead of hazardous chemical reagents. Through co-pyrolysis and activation of rice husk and bean dregs at different mass ratios of RH and BD (1:0, 2:1, 1:1, 1:2, 1:0), a series of carbon materials were fabricated. The physicochemical properties and capacitive performance of carbon were investigated. RBAC-3 displayed superior capacitive performance. The capacitance reached 319 F g−1 at 0.2 A g−1 using two-electrode system. The capacitance retention is as high as 92.6% after 10,000 cycles. The corresponding energy density reached 15.3 Wh kg−1, increased by 37% in comparison of pure rice husk-based electrode in 6 M KOH electrolyte. That result was ascribed to the best synergistic effects of hierarchical porous structure and particular nitrogen content, suggesting a promising electrode fabrication for high-performance supercapacitors.
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