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专业: 碳素材料与超硬材料

[交流] 木质素基静电纺丝碳纳米纤维网已有2人参与

Lignin-based electrospun carbon nanoﬁbrous webs as free-standing and binder-free electrodes for sodium ion batteries，Journal of Power Sources 272（2014）800-807.影响因子：5.211
摘要：Low-cost and bio-based carbon nanofibrous webs (PL-CNFs) are fabricated from polyacrylonitrile (PAN) reﬁned lignin (RL) which is extracted from hardwood lignosulfonate via simple eletrospinning followed by stabilization and carbonization. The effects of the PAN/RL mass ratios varying from 9/1,7/3 to 5/5 and heat-treatment temperatures (HTTs) in the range from 800, 1000 to 1300℃on morphology and structure of PL-CNFs are systematically studied. Due to unique morphology and weakly ordered turbostratic microstructure of the 3-D conductive composite networks, the PL-CNFs anode obtained at1300 ℃ with a mass ratio of 5/5 exhibits a high reversible capacity of 292.6 mA h g-1with an initial efﬁciency of 70.5% at a constant current density of 0.02 A g-1when used as free-standing and binder-free anodes for sodium ion batteries (SIBs). The anode also presents high rate capability (210 and 80 mA h g-1 at 0.4 and 1 A g-1, respectively) and excellent cycle stability (247 mA h g-1 reversible capacity with 90.2% capacity retention ratio at 0.1 A g-1over 200 cycles). It is demonstrated that biomass waste lignin can be applied as a promising precursor to fabricate low-cost-high performance carbon electrode materials for SIBs.
中文摘要翻译：用聚丙烯腈（PAN）和精炼的木质（RF）素制备了价格低廉的-生物基的碳纳米纤维状网络（PL-CNFs），精炼的木质素通过简单的电解沉积然后稳定和碳化方法从硬木质木质素磺酸盐中提取。系统的研究了PAN/RL质量比（从9/1，7/3到5/5）和热处理温度（800,1000到1300℃）对PL-CNFs形态和结构的影响。由于3-D导电复合网络独特的形态和无序的乱层微观结构，PL-CNFs正极在1300℃质量比5/5时呈现出高的可逆容量292.6mA h g-1，当用于钠离子电池（SIB）无支撑和无粘结剂的电极时，在恒定电流密度0.02Ag-1下具有70.5%的起始效率。正极也呈现出大电流性能（在0.4和1Ag-1分别是210和80mA h g-1）和极好的循环稳定性（在0.1 Ag-1200次循环后具有247mA h g-1的可逆容量90.2%的容量保持率）。证明生物质废弃物木质素是一种有前景的前驱体用于制备低成本高性能的SIB碳电极材料。木质素基静电纺丝碳纳米纤维网用做纳离子电池无支撑和无粘结剂的电极.pdf[/filename]

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