Boosting output performance of sliding mode triboelectric nanogenerator by charge space-accumulation effect

作者：Wencong He, Wenlin Liu, Jie Chen, Zhao Wang, Yike Liu, Xianjie Pu, Hongmei Yang, Qian Fang Tang, Huake Yang, Hengyu Guo, Chenguo Hu · 发表于：Nature Communications · 年份：2020 · DOI：10.1038/s41467-020-18086-4 · 被引用次数：307 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Conducting polymers and applications、Supercapacitor Materials and Fabrication

Abstract The sliding mode triboelectric nanogenerator (S-TENG) is an effective technology for in-plane low-frequency mechanical energy harvesting. However, as surface modification of tribo-materials and charge excitation strategies are not well applicable for this mode, output performance promotion of S-TENG has no breakthrough recently. Herein, we propose a new strategy by designing shielding layer and alternative blank-tribo-area enabled charge space-accumulation (CSA) for enormously improving the charge density of S-TENG. It is found that the shielding layer prevents the air breakdown on the interface of tribo-layers effectively and the blank-tribo-area with charge dissipation on its surface of tribo-material promotes charge accumulation. The charge space-accumulation mechanism is analyzed theoretically and verified by experiments. The charge density of CSA-S-TENG achieves a 2.3 fold enhancement (1.63 mC m −2 ) of normal S-TENG in ambient conditions. This work provides a deep understanding of the working mechanism of S-TENG and an effective strategy for promoting its output performance.