Title

Metallic MXenes: A New Family of Materials for Flexible Triboelectric Nanogenerators

Abstract

Wearable and flexible electronics warrant the development of self-powered devices to circumvent the limitations imposed by traditional energy storage devices. Triboelectric nanogenerators (TENGs) that convert waste mechanical energy from human motions into electric power offer a solution. Highly electronegative and yet conducting TENG materials that support the generation of both large potential differences and high currents are imperative for effectively harvesting electric power from human muscle movements. Here, we demonstrate that two-dimensional titanium carbide MXenes (Ti3C2Tx, where Txstands for surface functional groups such as -O, -OH, and –F) are a new family of electrically conducting materials that are triboelectrically more negative than polytetrafluorethylene or Teflon. Specifically, flexible MXene TENGs support both high open circuit voltages ranging from ~500 to ~650 V and an instantaneous peak power up to ~0.5 – 0.65 mW that could power > 60 light-emitting diodes or quickly charge a 1 μF capacitor up to 50 V. Lastly, we demonstrate that flexible MXene TENGs are capable of harvesting electrical power from simple muscle movements (e.g., texting) even when the device is flexed by ~30° suggesting facile integration with wearable electronics.

Department(s)

Chemistry

Comments

In Press, Accepted Manuscript

Keywords and Phrases

Triboelectric Nanogenerator; Renewable Energy; Wearable Electronics; Mxene, Flexible Device

International Standard Serial Number (ISSN)

2211-2855

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 Elsevier, All rights reserved.

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