Ba Yan-Yuan, Bao Jing-Fu, Deng Hai-Tao, Wang Zhi-Yong, Li Xiao-Wen, Gong Tianxun, Huang Wen, Zhang Xiao-Sheng
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
ACS Appl Mater Interfaces. 2020 Sep 23;12(38):42859-42867. doi: 10.1021/acsami.0c11932. Epub 2020 Sep 9.
As emerging ambient energy harvesting technology, triboelectric nanogenerators (TENGs) have proven to be a robust power source and have demonstrated the unique ability to power micro-nano electronics autonomously to form self-powered devices. Although four working modes of TENGs have been developed to promote the feasibility of self-powered micro-nano systems, the relatively complicated structure composed of multilayer and movable components limits the practical applications of TENGs. Herein, we propose a single-layer triboelectric nanogenerator (SL-TENG) based on ion-doped natural nanofibrils. Compared with the simplest mode of currently existing TENGs, i.e., the single-electrode type, this novel single-electrode TENG further simplifies the configuration by the removal of the dielectric layer. The underlying mechanism of the proposed SL-TENG is comprehensively investigated through electrical measurements and the analysis of the effect of ion species at different concentrations. In contrast to conventional TENGs that require electrodes to realize charge transfer, it is revealed that the ions doped into natural nanofibrils effectively realize charge transfer due to the separation and migration of cations and anions. This new working principle based on the combination of electrons and ions enables TENGs to show greater potential for applications since the ultrasimple single-layer configuration enables them to be more easily integrated with other electronic components; additionally, the whole device of the proposed SL-TENG is biodegradable because the natural nanofibrils are completely extracted from carrots.
作为新兴的环境能量收集技术，摩擦纳米发电机（TENGs）已被证明是一种强大的电源，并展现出自主为微纳电子设备供电以形成自供电设备的独特能力。尽管已开发出TENGs的四种工作模式以提升自供电微纳系统的可行性，但由多层和可移动部件组成的相对复杂结构限制了TENGs的实际应用。在此，我们提出一种基于离子掺杂天然纳米纤维的单层摩擦纳米发电机（SL-TENG）。与现有TENGs最简单的模式即单电极类型相比，这种新型单电极TENG通过去除介电层进一步简化了结构。通过电学测量以及对不同浓度离子种类影响的分析，对所提出的SL-TENG的潜在机制进行了全面研究。与需要电极来实现电荷转移的传统TENGs不同，研究表明，由于阳离子和阴离子的分离与迁移，掺杂到天然纳米纤维中的离子有效地实现了电荷转移。这种基于电子和离子结合的新工作原理使TENGs展现出更大的应用潜力，因为超简单的单层结构使其更易于与其他电子元件集成；此外，所提出的SL-TENG的整个装置是可生物降解的，因为天然纳米纤维完全是从胡萝卜中提取的。
