生物炭
超级电容器
材料科学
电容
热解
生物量(生态学)
原材料
碳纤维
电极
电流密度
化学工程
复合材料
化学
农学
有机化学
物理化学
复合数
工程类
生物
物理
量子力学
作者
S.E.M. Pourhosseini,Omid Norouzi,Hamid Reza Naderi
标识
DOI:10.1016/j.biombioe.2017.10.025
摘要
Cladophora glomerata (C. glomerata) biochar (raw biochar) with carbon-rich content and highly ordered micro/macro porous was prepared via slow pyrolysis technique and activated through a novel activation process with nitric acid. Then, both raw and treated biochar were characterized by XRD, FT-IR, FESEM-EDS, XPS, and BET analyses and used as a precursor to manufacture the working electrode. These electrodes demonstrate wonderful rate capability, high specific capacitance, and excellent cycle stability when first served as electrodes for supercapacitors. The treated biochar showed improved specific capacitance 376.7 F g−1 at the current density of 1 A g−1 with an energy density of 42.4 Whkg−1, while the specific capacitance of raw biochar at the same current density was relatively high (197.8 F g−1) with an energy density of 22.25 Whkg−1. The treated biochar electrode was also strongly stable showing only a 0.8% reduction in capacitance after 5000 successive potential cycles. Finally, the results of the study were compared to those obtained from carbon derived from agricultural wastes, terrestrial biomass, and organic wastes. The biochar derived marine biomass and treatment process developed here could provide a promising path for the low-cost, renewable and environmental friendly electrode materials.
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