Abstract
Environmental energy harvesting devices hold great prospect for the next generation electronics, which have attracted intensive attentions recently. In this research, a gradient polyoxometalates-modified graphene oxide (g-POMs-GO) with three-dimensional cross-linking inner structure is synthesized by a weak reductant of GO with ethylenediamine and a special soaking treatment in phosphotungstic acid (HPW). Owing to the gradient introduction of HPW, the as-prepared g-POMs-GO is able to provide moisture-enabled current output of 6.2 uA cm−2 with a power density of ≈ 0.7 mW m−2 by harvesting energy from moisture. Moreover, the humidity-to-electric conversion device of g-POMs-GO provides a new, practical method to track the respiratory activity of subjects and can directly use to record and analyze patterns of human breathing.
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Acknowledgements
This project is sponsored by the Fundamental Research Funds for the Central Universities (DC. 201502080403), the National Natural Science Foundation of China (Nos. 11804044, 61771092), and the Natural Science Foundation of Liaoning Province (No. 2015020072).
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Liu, J., Qi, Y., Liu, D. et al. Moisture-enabled electricity generation from gradient polyoxometalates-modified sponge-like graphene oxide monolith. J Mater Sci 54, 4831–4841 (2019). https://doi.org/10.1007/s10853-018-3183-6
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DOI: https://doi.org/10.1007/s10853-018-3183-6