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Nanoporous carbons from natural lignin: study of structural-textural properties and application to organic-based supercapacitors

机译:天然木质素中的纳米多孔碳:结构-结构性质的研究及其在有机超级电容器中的应用

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摘要

Lignin-derived nanoporous carbon with narrow and tuneable pore size distribution has been produced by activation with potassium hydroxide (KOH). The results manifest the competition between the oxidation reaction of carbon and the intriguing C-C bond re-organization provoked by the chemical activation. A trend between the average pore size and the in-plane crystal size of few-layer graphene is observed. The ability for non-Faradaic charge storage is negatively affected by the graphenization degree. The ionsieving effect is detected for carbon materials with an average pore size below 0.9 nm, suggesting at least partial solvation of electrolyte ions inside pores. Capacitance values up to 87 F g(-1) in an organic based electrolyte are obtained.
机译:木质素衍生的纳米孔碳具有狭窄且可调节的孔径分布,是通过用氢氧化钾(KOH)活化而产生的。结果表明,碳的氧化反应与化学活化引起的有趣的C-C键重组之间存在竞争。观察到平均厚度和几层石墨烯的面内晶体尺寸之间的趋势。非法拉第电荷存储的能力受到石墨化程度的负面影响。对于平均孔径低于0.9 nm的碳材料,检测到了离子筛除作用,这表明孔内电解质离子至少部分溶剂化。在基于有机的电解质中获得的电容值高达87 F g(-1)。

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