Abstract
Abstract Triboelectric nanogenerators (TENGs) have attracted much attention as energy harvesting and sensor devices. Compared with experimental means, theoretical analysis is of low cost and time-saving for behavior prediction and structural optimization and is more powerful for understanding the working mechanism of TENGs. In this article, the theoretical system for performance simulation of TENGs has been reviewed systematically. The parallel-plate capacitor model, the distance-dependent electric field (DDEF) model, figures of merit (FOMs), and multi-parameter analysis are introduced. The parallel-plate capacitor model is the most fundamental model of TENGs, which is used to simulate the output of TENGs with planar configurations. For non-planar TENGs, the DDEF model is proposed, according to which the electric field is assumed to be distance-dependent rather than being uniform throughout the space. Further, to realize the standardization of TENGs, a series of FOMs are proposed as the standardized evaluation tools for TENGs’ output performance, which are used to reflect the influence of device parameters on the output from different aspects. Lastly, the multi-parameter analysis is introduced to consider the impact of multiple parameters on the output of TENGs simultaneously. These theories constitute the theoretical simulation system of TENGs, which could be used to guide the experimental work on TENGs and boost device optimization in commercial manufacturing.
Highlights
Triboelectric nanogenerators (TENGs) have attracted much attention as energy harvesting and sensor devices
We have reviewed the theoretical simulation approaches for evaluating TENGs’ electric performance including the parallel-plate capacitor model, the distancedependent electric field (DDEF) model, the Figure of merit (FOM) and multi-parameter analysis for TENGs, which can be summarized as follows
(1) The parallel-plate capacitor model is the most fundamental model for TENGs. It is suitable for TENGs with planar configurations and does not apply to non-planar TENGs
Summary
Abstract: Triboelectric nanogenerators (TENGs) have attracted much attention as energy harvesting and sensor devices. Superior design and optimization methods of TENGs must be realized to accomplish the commercialization of various applications In this case, lots of experimental and theoretical research studies have been carried out to understand the working mechanism of the device and improve its output performance. Various optimization methods have been proposed based on the theoretical models established for TENGs, most of them utilize the single parameter analysis method, which focuses on investigating the effect of a single variable on device performance with others fixed. We primarily focus on the theoretical research studies in mechanism investigation and optimization of TENGs. In Section 2, the fundamental principles of the triboelectric effect and theoretical approaches for studying the mechanisms of TENGs are presented first, based on which the theoretical prediction theories of TENGs with parallel-plate capacitor and DDEF models are introduced. The DDEF model is proposed for nonplanar TENGs, which is more accurate because of the introduction of the DDEF
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