Thin, Flexible Secondary Li-Ion Paper Batteries

Liangbing Hu, Hui Wu, Fabio La Mantia, Yuan Yang, Yi Cui

Research output: Contribution to journalArticlepeer-review

736 Scopus citations


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
Original languageEnglish (US)
Pages (from-to)5843-5848
Number of pages6
JournalACS Nano
Issue number10
StatePublished - Sep 13 2010
Externally publishedYes


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