Switched-capacitor-convertors based on fractal design for output power management of triboelectric nanogenerator.

Abstract:

:Owing to the advantages of integration and being magnet-free and light-weight, the switched-capacitor-convertor plays an increasing role compared to traditional transformer in some specific power supply systems. However, the high output impedance and switching loss largely reduces its power efficiency, due to imperfect topology and transistors. Herein, we propose a fractal-design based switched-capacitor-convertors with characteristics including high conversion efficiency, minimum output impedance, and electrostatic voltage applicability. As a double-function output power management system for triboelectric nanogenerators, it delivers over 67 times charge boosting and 954 W m-2 power density in pulse mode, and achieves over 94% total energy transfer efficiency in constant mode. The establishment of the fractal-design switched-capacitor-convertors provides significant guidance for the development of power management toward multi-functional output for numerous applications. The successful demonstration in triboelectric nanogenerators also declares its great potential in electric vehicles, DC micro-grids etc.

journal_name

Nat Commun

journal_title

Nature communications

authors

Liu W,Wang Z,Wang G,Zeng Q,He W,Liu L,Wang X,Xi Y,Guo H,Hu C,Wang ZL

doi

10.1038/s41467-020-15373-y

subject

Has Abstract

pub_date

2020-04-20 00:00:00

pages

1883

issue

1

issn

2041-1723

pii

10.1038/s41467-020-15373-y

journal_volume

11

pub_type

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