In this work,poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)coated silver telluride(PCeAg2Te)nanorods were prepared by a wet-chemical method using the PEDOT:PSS coated tellurium(PCeTe)nanorods as th...In this work,poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)coated silver telluride(PCeAg2Te)nanorods were prepared by a wet-chemical method using the PEDOT:PSS coated tellurium(PCeTe)nanorods as the templates.Flexible PCeAg2Te nanocomposite film on polyethersulfone(PES)substrate was prepared through vacuum filtration followed by mechanical pressing process.An optimal PCeAg2Te nanocomposite film showed a maximum power factor of 143.3 mW/mK^(2) at room temperature and 221.7 μW/mK^(2 ) at 373 K.The electrical conductivity of the PCeAg2Te composite film decreased by3.3%after bending for 1000 times around a rod with a radius of 5 mm.An eight-leg thermoelectric generator assembled with the optimal PCeAg2Te nanocomposite film generated a maximum output power and output density of 209.4 nW and 141.5 mW/cm^(2) at a temperature gradient of 30.3 K.This work provides a facile method to prepare thermoelectric materials for flexible thermoelectric generators.展开更多
Flexible ternary carbon black/Bi_(2)Te_(3) based alloy/polylactic acid(CB/BTBA/PLA)composites were fabricated by additive manufacturing and their thermoelectric properties were investigated from 300 K to 360 K.At 300 ...Flexible ternary carbon black/Bi_(2)Te_(3) based alloy/polylactic acid(CB/BTBA/PLA)composites were fabricated by additive manufacturing and their thermoelectric properties were investigated from 300 K to 360 K.At 300 K,as the mass ratios of BTBAs in the composites increased from 38.5% to 71.4%,both the electrical conductivity and Seebeck coefficient of the composites increased from 5.8 S/cm to 13.3 S/cm,and from 60.2 mV/K to 119.9 mV/K,respectively,and the thermal conductivity slightly increased from 0.15 W m^(-1)K^(-1) to 0.25 W m^(-1)K^(-1),as a result,the ZT value of the composites increased from 0.004 to 0.023.As the temperature increased from 300 K to 360 K,the electrical conductivity of all the composites slightly decreased,while the thermal conductivity slowly increased,and a highest ZT value of 0.024 was achieved for the composites with 71.4% BTBAs at 320 K.Unlike traditional sterolithography,fused deposition modeling,selective laser melting,etc.,this additive manufacturing process can directly print the solutions which contain inorganic fillers and polymer matrixes into almost any designed intricate geometries of thermoelectric composites,therefore this process has great potential to be used for fabrication of flexible polymer based thermoelectric composites and devices.展开更多
基金supported by the National Natural Science Foundation of China(51972234,51632010)the National Key Research&Development Project of China(Grant No.2018YFE0111500)。
文摘In this work,poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)coated silver telluride(PCeAg2Te)nanorods were prepared by a wet-chemical method using the PEDOT:PSS coated tellurium(PCeTe)nanorods as the templates.Flexible PCeAg2Te nanocomposite film on polyethersulfone(PES)substrate was prepared through vacuum filtration followed by mechanical pressing process.An optimal PCeAg2Te nanocomposite film showed a maximum power factor of 143.3 mW/mK^(2) at room temperature and 221.7 μW/mK^(2 ) at 373 K.The electrical conductivity of the PCeAg2Te composite film decreased by3.3%after bending for 1000 times around a rod with a radius of 5 mm.An eight-leg thermoelectric generator assembled with the optimal PCeAg2Te nanocomposite film generated a maximum output power and output density of 209.4 nW and 141.5 mW/cm^(2) at a temperature gradient of 30.3 K.This work provides a facile method to prepare thermoelectric materials for flexible thermoelectric generators.
基金supported by the Shanghai Innovation Action Plan Project(17090503600)the National Natural Science Foundation of China(11811530636,61504081,61611530550)+4 种基金the Program for Professor of Special Appointment(Young Eastern Scholar Program)at Shanghai Institutions of Higher Learning(QD2015039)support from the Swedish Research Council under project no.2016-3365the Swedish Energy Agency under project 46519-1the Knut and Alice Wallenberg Foundation through the Wallenberg Academy Fellows programthe Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University(Faculty Grant SFO-Mat-LiU No.200900971).
文摘Flexible ternary carbon black/Bi_(2)Te_(3) based alloy/polylactic acid(CB/BTBA/PLA)composites were fabricated by additive manufacturing and their thermoelectric properties were investigated from 300 K to 360 K.At 300 K,as the mass ratios of BTBAs in the composites increased from 38.5% to 71.4%,both the electrical conductivity and Seebeck coefficient of the composites increased from 5.8 S/cm to 13.3 S/cm,and from 60.2 mV/K to 119.9 mV/K,respectively,and the thermal conductivity slightly increased from 0.15 W m^(-1)K^(-1) to 0.25 W m^(-1)K^(-1),as a result,the ZT value of the composites increased from 0.004 to 0.023.As the temperature increased from 300 K to 360 K,the electrical conductivity of all the composites slightly decreased,while the thermal conductivity slowly increased,and a highest ZT value of 0.024 was achieved for the composites with 71.4% BTBAs at 320 K.Unlike traditional sterolithography,fused deposition modeling,selective laser melting,etc.,this additive manufacturing process can directly print the solutions which contain inorganic fillers and polymer matrixes into almost any designed intricate geometries of thermoelectric composites,therefore this process has great potential to be used for fabrication of flexible polymer based thermoelectric composites and devices.
