A new biomass derived rod-like porous carbon from tea-waste as inexpensive and sustainable energy material for advanced supercapacitor application
A new biomass derived rod-like porous carbon from tea-waste as inexpensive and sustainable energy material for advanced supercapacitor application
复制标题
一种从茶渣中提取的新型生物质棒状多孔碳，作为先进超级电容器应用的廉价且可持续的能源材料
DOI：
10.1016/j.electacta.2019.135588
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发表时间：
2020-03-01
影响因子：
6.6
通讯作者：
Shu, Xin
中科院分区：
文献类型：
--
作者：
Khan, Abrar;Senthil, Raja Arumugam;Shu, Xin
由生物质量前体制备的多孔炭因其成本效益高、易于制备、环保和可持续发展而受到越来越多的研究关注。在本工作中，我们以茶叶下脚料为原料，通过简单、清洁的预炭化、酸洗和氢氧化钾活化处理，成功地制备了具有管状结构的高孔炭。含有的惰性无机杂质被酸和KOH处理完全去除，导致碳孔率大大增加。制备的生物质多孔炭具有较高的孔容，比表面积为1,610m(2)g(-1)。在6MKOH电解液中，用三电极结构分析了所制备的多孔炭的电化学性质。结果表明，当电流密度增大100倍时，多孔炭的比电容在1Ag(-1)时达到332Fg(-1)，在100Ag(-1)时达到222Fg(-1)，表现出优异的倍率性能。此外，该多孔炭还具有良好的长循环寿命，即使在100Ag(-1)下，在100,000次循环后，其初始电容仅损失2.2%。从茶叶废料中提取的新型生物质多孔炭具有良好的电化学性能，有望成为开发先进储能设备的高性能和绿色超级电容器的候选材料。(C)2020爱思唯尔有限公司。保留所有权利。
The porous carbons derived from bio-mass precursors for energy storage devices have gained increased research attention due to their cost effectiveness, easiness in fabrication, eco-friendly nature and sustainability. In the present work, we have successfully prepared the highly porous carbon with tube-like structures from tea-waste raw material using facile and clean treatments of pre-carbonization, acid washing and KOH activation procedures. The contained inert inorganic impurities were completely removed by acid and KOH treatments, resulting in much increased carbon porosity. The prepared biomass porous carbon has a high pore volume with a large surface area of 1,610 m(2 )g(-1). The electrochemical properties of the prepared porous carbon were analyzed with a 3-electrode configuration in 6 M KOH electrolyte. It is displayed that the porous carbon exhibited the high specific capacitances of 332 F g(-1) at 1 A g(-1), and 222 F g(-1) at 100 A g(-1) when current density increased 100 times, representing an outstanding rate performance. Besides, the porous carbon has achieved an excellent long-cycling life with only 2.2% loss of its initial capacitance over 100,000 cycles even at 100 A g(-1). The observed desirable electrochemical behavior of the new biomass porous carbon derived from tea waste would be a competitive candidate as cathode material in the development of high-performance and green supercapacitors for advanced energy storage devices. (C) 2020 Elsevier Ltd. All rights reserved.