期刊
2D MATERIALS
卷 2, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1583/2/2/024004
关键词
graphene; integrated electrode; flexible lithium ion batteries; Li4Ti5O12; LiFePO4
资金
- MOST of China [2014CB932402, 2012AA030303]
- National Science Foundation of China [51221264, 51172242, U1401243]
- Key Research Program of Chinese Academy of Sciences [KGZD-EW-T06]
We have prepared flexible free-standing electrodes with anode and cathode active materials deposited on a highly conductive graphene membrane by a two-step filtration method. Compared with conventional electrodes using metal as current collectors, these electrodes have displayed stronger adhesion, superior electrochemical performance, higher energy density, and better flexibility. A full lithium ion battery assembled by adopting these graphene-based electrodes has showed high rate capability and long cyclic life. We have also assembled a thin, lightweight, and flexible lithium ion battery with poly-(dimethyl siloxane) sheets as packaging material to light a red light-emitting diode. This flexible battery can be easily bent without structural failure or performance loss and operated well under a bent state. The fabrication process of these graphene-based integrated electrodes only has two filtration steps; thus it is easy to scale up. These results suggest great potential for these graphene-based flexible batteries in lightweight, bendable, and wearable electronic devices.
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