Enhancing the thermoelectric performance through the mutual interaction between conjugated polyelectrolytes and single-walled carbon nanotubes  

作　　者：Shuxun Wan Zhongming Chen Liping Hao Shichao Wang Benzhang Li Xiao Li Chengjun Pan Lei Wang 万树勋;陈忠明;郝丽苹;王世超;李本章;黎潇;潘成军;王雷(Shenzhen Key Laboratory of Polymer Science and Technology,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China;School of Environment and Civil Engineering,Dongguan Cleaner Production Technology Centre,Dongguan University of Technology,Dongguan 523808,China)

机构地区：[1]Shenzhen Key Laboratory of Polymer Science and Technology,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China [2]School of Environment and Civil Engineering,Dongguan Cleaner Production Technology Centre,Dongguan University of Technology,Dongguan 523808,China

出　　处：《Chinese Physics B》2022年第2期65-72,共8页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51803126 and 21704065);the Natural Science Foundation of Guangdong Province,China(Grant No.2018A0303130157)。

摘　　要：We present a method of constructing composites composed of conjugated polyelectrolytes(CPEs)and singlewalled carbon nanotubes(SWCNTs)to obtain a high-performing flexible thermoelectric generator.In this approach,three kinds of polymers,namely,poly[(1,4-(2,5-didodecyloxybenzene)-alt-2,5-thiophene](P1),poly[(1,4-(2,5-bis-sodium butoxysulfonate-phenylene)-alt-2,5-thiophene](P2),and poly[(1,4-(2,5-bis-acid butoxysulfonic-phenylene)-alt-2,5-thiophene](P3)are designed,synthesized and complexed with SWCNTs as thermoelectric composites.The electrical conductivities of the CPEs/SWCNTs(P2/SWCNTs,and P3/SWCNTs)nanocomposites are much higher than those of non-CPEs/SWCNTs(P1/SWCNTs)nanocomposites.Among them,the electrical conductivity of P2/SWCNTs with a ratio of 1:4 reaches 3686 S·cm^(-1),which is 12.4 times that of P1/SWCNTs at the same SWCNT mass ratio.Moreover,CPEs/SWCNTs composites(P2/SWCNTs)display remarkably improved thermoelectric properties with the highest power factor(PF)of 163μW·m^(-1)·K^(-1).In addition,a thermoelectric generator is fabricated with P2/SWCNTs composite films,and the output power and power density of this generator reach 1.37μW and 1.4 W·m;(cross-section)at△T=70 K.This result is over three times that of the thermoelectric generator composed of non-CPEs/SWCNTs composite films(P1/SWCNTs,0.37μW).The remarkably improved electrical conductivities and thermoelectric properties of the CPEs/SWCNTs composites(P2/SWCNTs)are attributed to the enhanced interaction.This method for constructing CPEs/SWCNTs composites can be applied to produce thermoelectric materials and devices.

关 键 词：COMPOSITES THERMOELECTRIC SWCNTS conjugated polyelectrolytes 

分 类 号：TB332[一般工业技术—材料科学与工程]