A metric for evaluating the pyroelectric conversion efficiency of pyroelectric nanogenerators

IF 3.8 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION

Smart Materials and Structures Pub Date : 2025-09-01 DOI:10.1088/1361-665x/ae02d0

Xilong Kang, Tianyang Geng, Fuli Li, Wenming Zhang, Junlei Wang

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引用次数: 0

Abstract

Abstract Pyroelectric nanogenerator (PyNG) technology has gradually become the most promising technology in the field of high-entropy energy harvest. However, due to the diversity of PyNG types, it is difficult to compare their superiorities uniformly, which poses a challenge in the development and optimization of PyNG. This article quantifies the ‘thermal input’ of the PyNG by introducing the physical quantity of heat flux, and quantifies the ‘electrical output’ of the PyNG by citing output power density. Further the evaluation metric for PyNG: pyroelectric conversion efficiency (PCE) has been derived. Then, a testing device capable of simultaneously detecting the heat flux and output electrical characteristics of PyNG was fabricated used to measure the PCE. Three groups of PyNGs with different components (P(VDF-TrFE)-BaTiO 3 ) were used in the PCE experiment, and their precise PCE were measured for the first time through a series of experiments. The optimum PCE of these three PyNGs are: 2.05 × 10 −4 , 2.7 × 10 −4 , and 3.19 × 10 −4 . This study establishes a metric for quantitatively and accurately characterizing PCE, and delivering simpler, and more intuitive results. The evaluation metric can provide a reference direction for the research and optimization of PyNG.

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热释电纳米发电机热释电转换效率的评价指标

热释电纳米发电机（PyNG）技术已逐渐成为高熵能量收集领域中最有前途的技术。然而，由于PyNG类型的多样性，很难统一比较它们的优势，这给PyNG的开发和优化带来了挑战。本文通过引入热流的物理量来量化PyNG的“热输入”，并通过引用输出功率密度来量化PyNG的“电输出”。进一步推导了PyNG的评价指标：热释电转换效率（PCE）。然后，制作了一种能够同时检测PyNG热流密度和输出电特性的测试装置，用于测量PCE，并将三组不同组分的PyNG （P(VDF-TrFE)-BaTiO 3）用于PCE实验，通过一系列实验首次测量了它们的精确PCE。最佳PCE分别为2.05 × 10−4、2.7 × 10−4和3.19 × 10−4。本研究建立了一个定量和准确表征PCE的指标，并提供更简单、更直观的结果。该评价指标可为PyNG的研究和优化提供参考方向。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

期刊介绍： Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.