木质素调控制备果糖基碳微球及电化学性能研究

Fabrication of Fructose-Based Carbon Microspheres Controlled by Lignosulfonate and Their Electrochemical Properties

关键词:  木质素磺酸盐  碳材料  自组装  电化学性能

Key Words:Lignosulfonate  Carbon materials  Self-assembly  Electrochemical properties

摘要:木质素磺酸盐是一种水溶性木质素，为亚硫酸盐法制浆的副产物，是具有双亲性结构的表面活性剂，主要作为水泥减水剂及染料分散剂等低附加值产品进行应用。该论文有效地利用木质素磺酸盐两亲性聚合物的结构特性，使其作为分散剂和协同模版剂，制备果糖基碳微球并探究了其对果糖在水热条件下的组装过程及调控机制。研究表明，木质素磺酸盐的加入是微球表面形成波纹状突起的决定因素。经高温碳化处理过后得到中空多孔的Yolk?Shell果糖基碳微球材料具有良好的电化学性能，比表面积为535.04 m2/g，孔容为0.26 cm3/g。电流密度为0.1 A/g时其比电容为96 F/g，能量密度为3.16 Wh/kg，功率密度为28.06 W/kg。

Abstract:Lignosulfonate is a kind of water-soluble lignin due to the introduction of sulfonate groups during chemical cooking. It is also an amphiphilic surfactant mainly used as low-value-added products such as cement water reducer and dye dispersant. In this thesis, the amphiphilic structure property of industrial lignosulfonate was effectively utilized，using lignosulfonates as a synergistic template, the assembly process and regulation mechanism of fructose under hydrothermal conditions were also studied. The results show that the addition of lignosulfonate is the decisive factor for the formation of ripple protuberances on the surface of microspheres. The hollow and porous Yolk-Shell fructose-based carbon microspheres after high temperature carbonization possessed superior specific surface area of 535.04 m2/g and a pore volume of 0.26 cm3/g. In addition, they also exhibited good electrochemical properties as the specific capacitance was 96 F/g, the energy density was 3.16 Wh/kg and the power density was 28.06 W/kg when the current density was 0.1 A/g.