将聚(3,4-乙烯二氧噻吩)∶聚苯乙烯磺酸盐(PEDOT∶PSS)自支撑薄膜应用于摩擦纳米发电机(TENG)中的电极与正极摩擦材料,以代替传统的金属电极。在PEDOT∶PSS中掺杂离子液体(IL)以提高薄膜的导电性和力学性能,同时可以增强摩擦电的输出,从而实现摩擦纳米发电机的高效制备。研究了不同含量的IL添加下薄膜的电导率、力学性能及对摩擦电输出的影响,并对发电机的稳定性、输出功率和压力的响应进行了评估。结果表明,IL的加入使得自支撑薄膜的电导率提升了两个数量级,同时改善了其机械性能。在IL含量为40%时,摩擦纳米发电机的输出达到最大,在1Hz频率、12N作用力下开路电压和短路电流分别达42V和0.2μA,电压输出约为未掺杂薄膜的4倍;相应器件在4000次循环下仍具有优异的稳定性,在100MΩ负载电阻下的功率密度可达11.5mW/m2,灵敏度在 0～30kPa的压力区间下可达1.1V/kPa,表现出良好的自供电柔性压力传感器的应用潜力。
Poly(3,4-ethylenedioxythiophene)∶polystyrene sulfonate (PEDOT∶PSS) free-standing films were used as electrodes and cathode friction materials in triboelectric nanogenerators (TENGs) to replace traditional metal electrodes.Ionic liquid (IL) were doped into PEDOT∶PSS to enhance the electrical conductivity and mechanical properties of the films,concurrently improving triboelectric output and enabling efficient fabrication of the triboelectric nanogenerator.The effects of different IL contents on the electrical conductivity,mechanical properties,and triboelectric output of the films were investigated.The stability,output power,and pressure response of the generators were also evaluated.The findings indicated that the addition of ILs increased the conductivity of the self-supporting film by two-order of magnitude and improved its mechanical properties.The optimal performance was achieved when IL content was 40%,resulting in a maximum output of 42 V and 0.2μA,respectively,at 1 Hz frequency and 12 N force.The corresponding device exhibited excellent stability after 4000 cycles,with a power density of up to 11.5mW·m-2 under a load resistance of 10 MΩ.Additionally,the sensitivity reached 1.1V/kPa in the pressure range of 0～30kPa,showcasing the potential for use as self-powered flexible pressure sensors.
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基金资助
江苏省博士后基金项目(2021K544C);江苏省高等学校自然科学基金面上项目(21KJB510004);江苏青蓝工程中青年学科带头人和江苏“333”人才基金的支持
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