摘要
Organic thermoelectric fibers have great potential as wearable thermoelectric textiles because of their one-dimensional structure and high flexibility.However,the insufficient thermoelectric performance,high fabrication cost,and mechanical fragility of most organic thermoelectric fibers significantly limit their practical applications.Here,we employ a rapid and cost-effective wet-spinning method to prepare dimethyl sulfoxide-doped poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)fiber bundles,followed by rational post-treatment with concentrated sulfuric acid(98%H_(2)SO_(4))to enhance their thermoelectric performance.The wearable fiber bundles composed of multiple individual PEDOT:PSS fibers have effectively reduced resistance and overall high tensile strength and stability.Rational treatment with H_(2)SO_(4)partially removes excessive PSS,thereby increasing the electrical conductivity to 4464 S cm‒1,while the parallel bundle is also a major factor in improving the power factor of up to 80.8μW m^(‒1)K^(‒2),which is super-competitive compared with those of currently published studies.Besides,the thermoelectric device based on these fiber bundles exhibits high flexibility and promising output power of 2.25 nW at a temperature difference of 25 K.Our work provides insights into the fabrication of all-organic flexible high-conductivity textiles with high thermoelectric properties.
基金
supported by the National Natural Science Foundation of China(No.52272040)
the State Key Laboratory of Materials-Oriented Chemical Engineering program(SKL-MCE-23A04)
the Jiangsu Specially Appointed Professor Program.
