黑液铝沉木质素@PAN基碳纤维电极材料电化学性能及其超级电容器应用研究

Electrochemical Properties of Black Liquor Al-precipitated Lignin@PAN-based Carbon Fiber Electrode Materials and Its Application in Supercapacitor

关键词:  竹浆黑液  高分子质量木质素  共沉除硅  碳纤维  超级电容器

Key Words:bamboo pulp black liquor  high molecular weight lignin  co-precipitated silicon removal  carbon fiber  supercapacitor

摘要:采用硫酸铝胶体沉淀分离竹浆黑液高分子质量木质素，得到铝沉木质素（AlpL），以AlpL和聚丙烯腈（PAN）为原料，采用静电纺丝法-预氧化-碳化路线，制备了电化学性能良好的AlpL@PAN基碳纤维并研究其作为超级电容器电极材料的电化学性能。当AlpL占比为60%时，AlpL@PAN基碳纤维表现出最好的电容性能和较好的循环稳定性；其内部电阻值达1.138 Ω，循环1000次后仍能保留94.50%的电容。

Abstract:In this study， high molecular weight lignin in the bamboo pulp black liquor was separated via colloidal precipitation by aluminum sulfate to obtain the Al-precipitated lignin （AlpL）， and then AlpL@PAN-based carbon fibers with good electrochemical properties were prepared by electrospinning， pre-oxidation and carbonization route with AlpL and polyacrylonitrile （PAN） as raw materials. When the AlpL proportion was up to 60%， AlpL@PAN-based carbon fibers showed the best capacitance performance and better cycle stability， of which the internal resistance value was 1.138 Ω with 94.50% of the capacitance retained after 1000 cycles.