Transparent lithium-ion batteries

Type
Article

Authors
Yang, Y.
Jeong, S.
Hu, L.
Wu, H.
Lee, S. W.
Cui, Y.

KAUST Grant Number
KUS-l1-001-12

Online Publication Date
2011-07-25

Print Publication Date
2011-08-09

Date
2011-07-25

Abstract
Transparent devices have recently attracted substantial attention. Various applications have been demonstrated, including displays, touch screens, and solar cells; however, transparent batteries, a key component in fully integrated transparent devices, have not yet been reported. As battery electrode materials are not transparent and have to be thick enough to store energy, the traditional approach of using thin films for transparent devices is not suitable. Here we demonstrate a grid-structured electrode to solve this dilemma, which is fabricated by a microfluidics-assisted method. The feature dimension in the electrode is below the resolution limit of human eyes, and, thus, the electrode appears transparent. Moreover, by aligning multiple electrodes together, the amount of energy stored increases readily without sacrificing the transparency. This results in a battery with energy density of 10 Wh/L at a transparency of 60%. The device is also flexible, further broadening their potential applications. The transparent device configuration also allows in situ Raman study of fundamental electrochemical reactions in batteries.

Citation
Yang Y, Jeong S, Hu L, Wu H, Lee SW, et al. (2011) Transparent lithium-ion batteries. Proceedings of the National Academy of Sciences 108: 13013–13018. Available: http://dx.doi.org/10.1073/pnas.1102873108.

Acknowledgements
We thank Jianbin Wang and Yu Lin for helpful discussions. We acknowledge Wenshan Cai for drawings. We thank Sy Bohy for viscosity measurements. Karim Zaghib (Hydro-Quebec, Varennes, Canada) is acknowledged for providing Li4Ti5O12 samples. Y.Y. acknowledges support from a Stanford Graduate Fellowship. S.J. acknowledges support from the Korea Foundation for Advanced Studies. S. W. L. acknowledges support from King Abdullah University of Science and Technology (KAUST). The work is supported by KAUST under Award KUS-l1-001-12.

Publisher
Proceedings of the National Academy of Sciences

Journal
Proceedings of the National Academy of Sciences

DOI
10.1073/pnas.1102873108

PubMed ID
21788483

PubMed Central ID
PMC3156205

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