Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/145338
Title: Self-restoring, waterproof, tunable microstructural shape memory triboelectric nanogenerator for self-powered water temperature sensor
Authors: Xiong, Jiaqing
Luo, Hongsheng
Gao, Dace
Zhou, Xinran
Cui, Peng
Thangavel, Gurunathan
Parida, Kaushik
Lee, Pooi See
Keywords: Engineering::Materials
Issue Date: 2019
Source: Xiong, J., Luo, H., Gao, D., Zhou, X., Cui, P., Thangavel, G., . . . Lee, P. S. (2019). Self-restoring, waterproof, tunable microstructural shape memory triboelectric nanogenerator for self-powered water temperature sensor. Nano Energy, 61, 584-593. doi:10.1016/j.nanoen.2019.04.089
Journal: Nano Energy
Abstract: The thermal induced temporal changes of microstructured shape memory polymer for self-recovery triboelectric nanogenerator can be indigenously harnessed for water energy harvesting and water temperature sensing, simultaneously. Here, tunable microarchitectures of a thermally triggered shape memory polymer are realized by electrospinning, namely mats of microfibers (MFs), microspheres (MSs), and microspheres-nanofibers (MSNFs). The tunable microarchitectured shape memory triboelectric nanogenerators (mSM-TENG) exhibit self-restoring ability in both macro shape and micro morphology, while attaining enhanced and alterable triboelectric output (∼150–320 V, ∼2.5–4 μA cm−2) due to increased frictional effects enabled by the high surface roughness. Typically, the MFs mat is realized as a skin-contact-driven shape memory TENG, serving well as wearable power source due to variable temporary shapes that are realizable under heating. At the micro level, self-restoring capability enabled by thermal stimuli renders the deformed mats capable of restoring to the original microstructures, affording the durable TENGs with prolonged lifetime. By the aid of a cellulose oleoyl ester, waterproof mat based TENGs with retentive rough surface are attainable for harvesting energy from both cold and hot water. Accordingly, a deformed waterproof TENG is found to be recoverable in shape under hot water. The gradient surface roughness delivers distinguishable triboelectric outputs during the structural recovery process, enabling a water energy harvester with sensing ability for water temperature (25 ± 5 °C to 95 °C), promising for self-powered waterproof wearable electronics and smart wastewater management system.
URI: https://hdl.handle.net/10356/145338
ISSN: 2211-2855
DOI: 10.1016/j.nanoen.2019.04.089
Rights: © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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