Thermoelectric properties of electrospun carbon nanofibres derived from lignin

被引:94
作者
Dalton, Niall [1 ]
Lynch, Robert P. [1 ,2 ]
Collins, Maurice N. [3 ,4 ]
Culebras, Mario [3 ]
机构
[1] Univ Limerick, Bernal Inst, Dept Phys, Limerick, Ireland
[2] Case Western Reserve Univ, Dept Chem & Biomol Engn, Cleveland, OH 44106 USA
[3] Univ Limerick, Sch Engn, Bernal Inst, Stokes Labs, Limerick, Ireland
[4] Univ Limerick, Hlth Res Inst, Limerick, Ireland
基金
欧盟地平线“2020”;
关键词
POWER-FACTOR; SEEBECK COEFFICIENT; THIN-FILMS; FIBERS; STATE; PERFORMANCE; PRECURSOR; POLYMERS; BLENDS; PEDOT;
D O I
10.1016/j.ijbiomac.2018.10.051
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Developing sustainable and efficient thermoelectric materials is a challenge because the most common thermoelectric materials are based on rare elements such as bismuth and telluride. In this context, we have produced bio-based carbon nanofibres (CNFs) derived from mixtures of polyacrylonitrile and lignin using electrospinning. The addition of lignin (up to 70%) reduces the diameter of CNFs from 450 nm to 250 nm, increases sample flexibility, and promotes inter-fibre fusion. The crystalline structure of the CNFs was analysed by Raman spectroscopy. The electrical conductivity and the Seebeck coefficient were evaluated as function of the lignin content in the precursor and carbonised equivalents. Finally, a conversion of p-type to n-type semiconducting behaviour was achieved with a hydrazine vapour treatment. We observe a maximum p-type power factor of 9.27 mu W cm(-1) K-2 for CNFs carbonised at 900 degrees C with 70% lignin which is a 34.5-fold increase to the CNFs with 0% lignin. For the hydrazine treated samples, we observe a maximum n-type power factor of 10.2 mu W cm(-1) K-2 for the CNFs produced in the same way which is an 11.0-fold increase to the hydrazine-treated CNFs with 0% lignin. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:472 / 479
页数:8
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