Abstract
Thermoelectric generators(TEGs)have received increasing attention due to their potential to harvest low-grade heat energy(＜100℃)and provide power for the Internet of Things(IoT)and wearable elec-tronic devices.Herein,a wood-based ordered framework is used to fabricate carbon nanotube/poly(3,4-ethylenedioxythiophene)(CNT/PEDOT)wood aerogel for TEG.The prepared CNT/PEDOT wood aerogel with an anisotropic structure exhibits a low thermal conductivity of 0.17 W m-1 K-1 and is advantageous to develop a sufficient temperature gradient.Meanwhile,CNT/PEDOT composites effectively decouple the relationship between the Seebeck coefficient and electrical conductivity by energy filtering effect to en-hance thermoelectric(TE)output properties.The vertical TEG assembled by the CNT/PEDOT wood aero-gels reveals an output power of 1.5 μW and a mass-specific power of 15.48 μW g-1 at a temperature difference of 39.4 K.Moreover,the layered structure renders high compressibility and fatigue resistance.The anisotropic structure,high mechanical performance,and rapid thermoelectric response,enabling the TEG based on CNT/PEDOT wood aerogel offer opportunities for continuous power supply to low-power electronic devices.
基金项目
国家自然科学基金(32071714)
Guangzhou Science and Technol-ogy project(202002030167)
Guangdong Basic and Applied Basic Research Foundation(2019A1515110910)
NETL
NSTL
维普
万方数据