Ba Yan-Yuan, Bao Jing-Fu, Liu Xin-Tian, Li Xiao-Wen, Deng Hai-Tao, Wen Dan-Liang, Zhang Xiao-Sheng
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
Research (Wash D C). 2021 Nov 9;2021:9817062. doi: 10.34133/2021/9817062. eCollection 2021.
Recently, triboelectric nanogenerators (TENGs) have been promoted as an effective technique for ambient energy harvesting, given their large power density and high energy conversion efficiency. However, traditional TENGs based on the combination of triboelectrification effect and electrostatic induction have proven susceptible to environmental influence, which intensively restricts their application range. Herein, a new coupling mechanism based on electrostatic induction and ion conduction is proposed to construct flexible stable output performance TENGs (SOP-TENGs). The calcium chloride doped-cellulose nanofibril (CaCl-CNF) film made of natural carrots was successfully introduced to realize this coupling, resulting from its intrinsic properties as natural nanofibril hydrogel serving as both triboelectric layer and electrode. The coupling of two conductive mechanisms of SOP-TENG was comprehensively investigated through electrical measurements, including the effects of moisture content, relative humidity, and electrode size. In contrast to the conventional hydrogel ionotronic TENGs that require moisture as the carrier for ion transfer and use a hydrogel layer as the electrode, the use of a CaCl-CNF film (i.e., ion-doped natural hydrogel layer) as a friction layer in the proposed SOP-TENG effectively realizes a superstable electrical output under varying moisture contents and relative humidity due to the compound transfer mechanism of ions and electrons. This new working principle based on the coupling of electrostatic induction and ion conduction opens a wider range of applications for the hydrogel ionotronic TENGs, as the superstable electrical output enables them to be more widely applied in various complex environments to supply energy for low-power electronic devices.
最近，摩擦纳米发电机（TENGs）因其高功率密度和高能量转换效率，已成为一种有效的环境能量收集技术。然而，基于摩擦起电效应和静电感应相结合的传统TENGs已被证明易受环境影响，这严重限制了它们的应用范围。在此，提出了一种基于静电感应和离子传导的新型耦合机制，以构建具有灵活稳定输出性能的TENGs（SOP-TENGs）。成功引入了由天然胡萝卜制成的氯化钙掺杂纤维素纳米纤维（CaCl-CNF）薄膜来实现这种耦合，这得益于其作为天然纳米纤维水凝胶的固有特性，可同时用作摩擦电层和电极。通过电学测量全面研究了SOP-TENG两种导电机制的耦合，包括水分含量、相对湿度和电极尺寸的影响。与传统的水凝胶离子电子TENGs不同，后者需要水分作为离子转移的载体并使用水凝胶层作为电极，在所提出的SOP-TENG中使用CaCl-CNF薄膜（即离子掺杂天然水凝胶层）作为摩擦层，由于离子和电子的复合转移机制，在不同的水分含量和相对湿度下有效地实现了超稳定的电输出。这种基于静电感应和离子传导耦合的新工作原理为水凝胶离子电子TENGs开辟了更广泛的应用范围，因为超稳定的电输出使它们能够更广泛地应用于各种复杂环境中，为低功率电子设备供电。
