Improved Output Performance of Triboelectric Nanogenerator by Fast Accumulation Process of Surface Charges

• DOI: 10.1002/aenm.202100050
• Publication Date: 2021-03-04T15:42:11Z
• Authors: Yanhong Li; Zhihao Zhao; Lu Liu; Linglin Zhou; Di Liu; Shaoxin Li; Shengyang Chen; Yejing Dai; Jie Wang; Zhong Lin Wang
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

AbstractAs a promising energy harvesters, triboelectric nanogenerators (TENG) can be utilized to convert distributed energy into electric power, but the slow charge accumulation incorporated with the inevitable charge decay/leakage of conventional TENGs result in a low surface charge density and an inferior output performance, limiting their practical applications. Here, an effective strategy is proposed to realize high charge density by using a fast charge accumulation process on dielectric material with high relative permittivity. As a result, the charge density is tremendously improved to 2.20 mC m−2 on the poly(vinylidene fluoride‐trifluoroethylene) film. Meanwhile, the fast charge accumulation is highly conducive to reach a high charge density of 1.30 mC m−2 in a 90% relative humidity environment, which is ≈260 times that of a TENG with slow charge accumulation. This work not only provides a new insight into charge accumulation and equilibrium state, but also provides significant guidance on the performance optimization of TENG.