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| 1 | Toward improved trade-off between thermoelectric and mechanical performances in polycarbonate/single-walled carbon nanotube composite films显示文摘Polymer thermoelectric(TE)composites have witnessed explosive developments in recent years,arising from their promising prospect for lightweight flexible electronics and capability of harvesting waste-heat.In sharp contrast with intrinsically conducting polymers(CPs),the insulating thermoplastics have seldom been employed as the matrices for flexible TE composites despite their advantages of low costs,controllable melt-flowing behaviors and excellent mechanical properties.Here,we report flexible films of polycarbonate/single-walled carbon nanotube(PC/SWCNT)composites with improved trade-off between TE and mechanical performances.The SWCNTs with 1D nanostructure were dramatically aligned by PC melt-flowing under hot-pressing in the radial direction.The composite maximum power factor reaches 4.8±0.8μW m^(−1) K^(−2) at 10 wt%SWCNTs in the aligned direction,which is higher than most previously reported thermoplastics-based TE composites at the same SWCNT loading and even comparable to some intrinsically CPs and their composites.In addition,these composites display significantly higher tensile modulus and strength than CPs and their composites.This study paves an effective way to fabricate flexible films of polymer composites with simultaneously high TE and mechanical performances via judicious alignment of SWCNTs in thermoplastic polymers. | Yichuan Zhang Liang Deng Haicai Lv Guangming Chen | 2020 | npj Flexible Electronics2020，4，1： | 3 |
| 2 | Bottom-Up Engineering Strategies for High-Performance Thermoelectric Materials显示文摘The recent advancements in thermoelectric materials are largely credited to two factors,namely established physical theories and advanced materials engineering methods.The developments in the physical theories have come a long way from the“phonon glass electron crystal”paradigm to the more recent band convergence and nanostructuring,which consequently results in drastic improvement in the thermoelectric figure of merit value.On the other hand,the progresses in materials fabrication methods and processing technologies have enabled the discovery of new physical mechanisms,hence further facilitating the emergence of high-performance thermoelectric materials.In recent years,many comprehensive review articles are focused on various aspects of thermoelectrics ranging from thermoelectric materials,physical mechanisms and materials process techniques in particular with emphasis on solid state reactions.While bottom-up approaches to obtain thermoelectric materials have widely been employed in thermoelectrics,comprehensive reviews on summarizing such methods are still rare.In this review,we will outline a variety of bottom-up strategies for preparing high-performance thermoelectric materials.In addition,state-of-art,challenges and future opportunities in this domain will be commented. | Qiang Zhu Suxi Wang Xizu Wang Ady Suwardi Ming Hui Chua Xiang Yun Debbie Soo Jianwei Xu | 2021 | Nano-Micro Letters2021，13，8： | 1 |
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