超级电容器
材料科学
电容
储能
电极
功率密度
化学工程
比能量
锰
纳米技术
冶金
化学
工程类
物理化学
功率(物理)
物理
量子力学
作者
Fei Fei,Hai Zhou,Chen Gu,Min Kang
标识
DOI:10.1016/j.colsurfa.2022.130061
摘要
Biomass derived energy storage materials with unique structure, chemical composition, and surface property have become a research hotspot. Herein, pokeweed leaves with high manganese enrichment ability are used for the preparation of activated carbon (AC) and mixed oxides (MO), which are used as the negative and positive electrodes for hybrid supercapacitor. Benefiting from the highly porous structure, the AC and MO samples exhibit high energy storage capability. The optimized AC-700 exhibits a high specific capacitance of 317.3 F∙g−1 at 0.5 A∙g−1 and excellent cycling stability with 90.8 % capacitance retention after 10,000 cycles. Furthermore, the MO-500//AC-700 asymmetric supercapacitor (ASC) fabricated by MO-500 and AC-700 displays high energy and power density (70.3 Wh∙kg−1 at 793.9 W∙kg−1) as well as excellent cyclic stability (91 % capacitance retention after 10,000 cycles), suggesting a high energy storage performance. The present work supplies a facile and efficient strategy for the preparation of high performance supercapacitor materials by using biomass with high metal enriching ability.
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