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Preparation of Hierarchical Porous Activated Carbon from Banana Leaves for High‐performance Supercapacitor: Effect of Type of Electrolytes on Performance
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-11-25 , DOI: 10.1002/asia.202001342
Chanchal Kumar Roy 1 , Syed Shaheen Shah 2 , Akter H. Reaz 1 , Sharmin Sultana 1 , Al‐Nakib Chowdhury 1 , Shakhawat H. Firoz 1 , Md. Hasan Zahir 3 , Mohammed Ameen Ahmed Qasem 2 , Md. Abdul Aziz 2
Affiliation  

We demonstrate a facile efficient way to fabricate activated carbon nanosheets (ACNSs) consisting of hierarchical porous carbon materials. Simply heating banana leaves with K2CO3 produce ACNSs having a unique combination of macro‐, meso‐ and micropores with a high specific surface area of ∼1459 m2 g−1. The effects of different electrolytes on the electrochemical supercapacitor performance and stability of the ACNSs are tested using a two‐electrode system. The specific capacitance (Csp) values are 55, 114, and 190 F g−1 in aqueous 0.5 M sodium sulfate, organic 1 M tetraethylammonium tetrafluoroborate in acetonitrile, and pure ionic liquid 1‐butyl‐3‐methylimidazolium hexafluorophosphate ([BMIM][PF6]) electrolytes, respectively. The ACNSs also shows the largest potential window of 3.0 V, the highest specific energy (59 Wh kg−1) and specific power (750 W kg−1) in [BMIM][PF6]. A mini‐prototype device is prepared to demonstrate the practicality of the ACNSs.

中文翻译:

从香蕉叶制备高性能超级电容器用分层多孔活性炭:电解质类型对性能的影响

我们展示了一种简便有效的方法来制造由分层多孔碳材料组成的活性炭纳米片(ACNS)。只需用K 2 CO 3加热香蕉叶即可生产出具有大,中,微孔独特组合的ACNS,其比表面积约为1459 m 2  g -1。使用双电极系统测试了不同电解质对ACNS电化学超级电容器性能和稳定性的影响。比电容(C sp)值为55、114和190 F g -1分别在0.5 M硫酸钠水溶液,1 M有机四乙基四氟硼酸乙腈溶液和纯离子液体1-丁基-3-甲基咪唑六氟磷酸盐([BMIM] [PF 6 ])电解质中。ACNS在[BMIM] [PF 6 ]中还显示出最大的3.0 V电位窗口,最高的比能量(59 Wh kg -1)和比功率(750 W kg -1)。准备了一个微型原型设备来演示ACNS的实用性。
更新日期:2020-11-25
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