离子液体辅助条件下由稻壳合成超级电容器用多孔炭

doi:10.13208/j.electrochem.180721

电化学（中英文） ›› 2019, Vol. 25 ›› Issue (6): 764-772. doi: 10.13208/j.electrochem.180721

离子液体辅助条件下由稻壳合成超级电容器用多孔炭

张韩方，魏风，孙健，荆梦莹，何孝军^*

安徽工业大学化学与化工学院，安徽省煤清洁转化与综合利用重点实验室，安徽马鞍山 243002

收稿日期:2018-07-23 修回日期:2018-08-28 出版日期:2019-12-28 发布日期:2019-12-28
通讯作者: 何孝军 E-mail:agdxjhe@126.com

Ionic Liquid Assisted Synthesis of Porous Carbons from Rice Husk for Supercapacitors

ZHANG Han-fang, WEI Feng, SUN Jian, JING Meng-ying, HE Xiao-jun^*

School of Chemistry and Chemical Engineering, Anhui Key Lab of Coal Clean Conversion and Utilization, Anhui University of Technology, Maanshan 243002, China

Received:2018-07-23 Revised:2018-08-28 Published:2019-12-28 Online:2019-12-28
Contact: HE Xiao-jun E-mail:agdxjhe@126.com
Supported by:
This work was supported by the National Natural Science Foundation of China (Nos. U1508201, U1710116), the Provincial Innovative Group for Processing & Clean Utilization of Coal Resource.

1. 张韩方附件.pdf(112180KB)

摘要/Abstract

摘要： 本文以稻壳为碳源，以离子液体1-丁基-3-甲基咪唑六氟磷酸盐(BMIMPF₆)为模板和辅助活化剂制备了多孔炭材料（PCs）. 多孔炭的比表面积达1438 m²·g^-1，总孔容达0.75 cm³·g^-1. 以PCs为超级电容器电极材料，6 mol·L^-1的KOH溶液为电解液组装成扣式电池，在0.05 A·g^-1的电流密度下，比电容高达256 F·g^-1；当电流密度增大至10 A·g^-1，其比电容仍保持在211 F·g^-1，展现出好的倍率性能. 所得的多孔炭电极均表现出优异的循环稳定性. 这一工作以BMIMPF₆作为模板和辅助活化剂，为合成生物质基超级电容器用多孔炭提供了一种新方法.

关键词: 多孔炭, 1-丁基-3-甲基咪唑六氟磷酸盐离子液体, 稻壳, 超级电容器

Abstract: It is still a challenge to prepare carbon materials with high specific surface area at low cost from renewable resources. Herein, the authors report an efficient approach to synthesize porous carbons (PCs) from rice husk with ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF₆)) as a template and an activation agent. The as-made PCs featured the high specific surface area up to 1438 m²·g^-1. As electrodes for supercapacitors, PCs showed a high specific capacitance of 256 F·g^-1 at 0.05 A·g^-1 in 6 mol·L^-1 KOH aqueous electrolyte and a good rate performance of 211 F·g^-1 at 10 A·g-1. All the PC electrodes exhibited good cycle stability. This work provides a new way for efficient synthesis of PCs from biomass using BMIMPF₆ as a template and an assisted activation agent for high-performance supercapacitors.

Key words: porous carbon, BMIMPF₆, rice husk, supercapacitor

中图分类号:

O646

Support info: electrochem.xmu.edu.cn

张韩方, 魏风, 孙健, 荆梦莹, 何孝军. 离子液体辅助条件下由稻壳合成超级电容器用多孔炭[J]. 电化学（中英文）, 2019, 25(6): 764-772.

ZHANG Han-fang, WEI Feng, SUN Jian, JING Meng-ying, HE Xiao-jun. Ionic Liquid Assisted Synthesis of Porous Carbons from Rice Husk for Supercapacitors[J]. Journal of Electrochemistry, 2019, 25(6): 764-772.

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离子液体辅助条件下由稻壳合成超级电容器用多孔炭

Ionic Liquid Assisted Synthesis of Porous Carbons from Rice Husk for Supercapacitors

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