There is a strong interest in thin, flexible energy storage devices to meet modern society needs for applications such as interactive packaging, radio frequency sensing, and consumer products. In this article, we report a new structure of thin, flexible Li-ion batteries using paper as separators and free-standing carbon nanotube thin films as both current collectors. The current collectors and Li-ion battery materials are integrated onto a single sheet of paper through a lamination process. The paper functions as both a mechanical substrate and separator membrane with lower impedance than commercial separators. The CNT film functions as a current collector for both the anode and the cathode with a low sheet resistance (∼5 Ohm/sq), lightweight (∼0.2 mg/cm2), and excellent flexibility. After packaging, the rechargeable Li-ion paper battery, despite being thin (∼300 μm), exhibits robust mechanical flexibility (capable of bending down to
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-I1-001-12
Acknowledgements: Y.C., L.H., H.W., and F.L.M. acknowledge support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-I1-001-12). Karim Zaghib from Hydro-Quebec is gratefully acknowledged for the generous supply of the LTO electrode materials. Y.Y. acknowledges financial support from a Stanford Fellowship.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.