聚四氟乙烯掺杂对弹性基摩擦纳米发电机输出性能的影响
Effect of Polytetrafluoroethylene Doping on the Output Performance of Elastic Based Triboelectric Nanogenerator
高晓波 1郭锋 1陈宝东 2邢方静 2孙武亮 1高伟1
作者信息
- 1. 内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特 010051
- 2. 中国科学院北京纳米能源与系统研究所,北京 101400;中国科学院大学纳米科学与技术学院,北京 100049
- 折叠
摘要
弹性摩擦纳米发电机可以将弹性形变的机械能转换为电能,但是弹性材料在发生弹性变形时由于其接触面积减小等原因,导致电输出性能降低,而弹性摩擦纳米发电机被认为是弹性能量收集与输出装置的理想模式.文中采用常规自然发泡的方法制备出弹性多孔聚氨酯摩擦电材料,并通过均匀和梯度掺杂的方式掺入介电材料聚四氟乙烯来提升电输出性能.聚醚多元醇和异氰酸酯比例为2:1且聚四氟乙烯掺杂含量为3%时,均匀掺杂弹性多孔摩擦纳米发电机的转移电荷量、开路电压和短路电流达到最大值52 nC,133.6 V和1.3 μA;梯度比例为3:1时,在相同条件下,梯度掺杂弹性多孔摩擦纳米发电机的转移电荷量,开路电压和短路电流较均匀掺杂弹性多孔摩擦纳米发电机分别提升了32.65%,33.33%和9%.通过有限元电势分布模拟和相互作用电动力学理论推导,验证了梯度掺杂较均匀掺杂的摩擦纳米发电机电输出性能有较强的提升作用.为弹性多孔聚氨酯摩擦电材料的设计与制备提供了新思路.
Abstract
The elastic triboelectric nanogenerator(TENG)can convert mechanical energy of elastic deformation into electrical energy.However,the electrical output performance of elastic materials decreases due to the reduction of contact area during elastic deformation.The elastic TENG is considered as an ideal model for elastic energy harvesting and output device.In this work,the elastic porous polyurethane triboelectric material was prepared by conventional natural foaming method,and the dielectric material polytetrafluoroethylene(PTFE)was mixed with uniform and gradient doping to improve the electrical output performance.Uniform doping electrical output performance decreases with the increase of foam ratio,with the increase of PTFE content showing a trend of first increase and then decline,at the foam ratio of 2:1 and PTFE doping content of 3%,the uniform doping elastic porous TENG amount of transfer charge,open-circuit voltage and short-circuit current are 52 nC,133.6 V and 1.3 μA.The output performance of gradient doping increases with the increase of PTFE gradient content ratio.When the gradient ratio is 3:1,the charge transfer quantity,open-circuit voltage and short-circuit current of the gradient doping elastic porous TENG are increased by 32.65%,33.33%and 9%,respectively,compared with the uniformly doping elastic porous TENG under the same conditions.Through the finite element simulation of potential distribution and interaction electrodynamics theory,it is deduced that the gradient doping results in an uneven gradient electric field inside the triboelectric material,which increases the movement of triboelectric charge to electrode.Therefore,it is verified that the output performance of TENG with gradient doping is better than that with uniform doping.This study provides a new idea for the design and preparation of elastic porous polyurethane triboelectric materials.
关键词
聚四氟乙烯/聚氨酯/摩擦纳米发电机/能量收集Key words
polytetrafluoroethylene/polyurethane/triboelectric nanogenerator/energy harvesting引用本文复制引用
基金项目
内蒙古自治区研究生科研创新项目(B20231108Z)
出版年
2024
NETL
NSTL
万方数据