使用三维插层电极提高压电纳米发电机的电流密度。

Enhancing the current density of a piezoelectric nanogenerator using a three-dimensional intercalation electrode.

作者信息

Gu Long, Liu Jinmei, Cui Nuanyang, Xu Qi, Du Tao, Zhang Lu, Wang Zheng, Long Changbai, Qin Yong

机构信息

School of Advanced Materials and Nanotechnology, Xidian University, Xi'an, 710071, China.

Institute of Nanoscience and Nanotechnology, Lanzhou University, Gansu, 730000, China.

出版信息

Nat Commun. 2020 Feb 25;11(1):1030. doi: 10.1038/s41467-020-14846-4.

DOI:10.1038/s41467-020-14846-4

PMID:32098958

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7042353/

Abstract

The low output current density of piezoelectric nanogenerators (PENGs) severely restricts their application for ambient mechanical energy harvest. This has been a key challenge in the development of PENG. Here, to conquer this, based on a piezoelectric material with high piezoelectric coefficient (Sm-PMN-PT), a new design of PENG with a three-dimensional intercalation electrode (IENG) is proposed. By creating many boundary interfaces inside the piezoelectric material, the total amount of surface polarization charges increased, which contributes to an increased current density. The IENG can output a maximum peak short-circuit current of 320 μA, and the corresponding current density 290 μA cm is 1.93 and 1.61 times the record values of PENG and triboelectric nanogenerator (TENG), respectively. It can also charge a 1 μF capacitor from 0 V to 8 V in 21 cycles, and the equivalent surface charge density 1690 μC m is 1.35 times the record value of TENG.

摘要

压电纳米发电机（PENG）的低输出电流密度严重限制了其在环境机械能收集方面的应用。这一直是PENG发展中的关键挑战。在此，为克服这一问题，基于具有高压电系数的压电材料（Sm-PMN-PT），提出了一种具有三维插入电极的新型PENG设计（IENG）。通过在压电材料内部创建许多边界界面，表面极化电荷总量增加，这有助于提高电流密度。IENG可输出最大峰值短路电流320 μA，相应的电流密度290 μA/cm分别是PENG和摩擦纳米发电机（TENG）记录值的1.93倍和1.61倍。它还能在21个周期内将1 μF的电容器从0 V充电至8 V，等效表面电荷密度1690 μC/m是TENG记录值的1.35倍。