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Issue 14, 2018
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A flexible polymer-based Li–air battery using a reduced graphene oxide/Li composite anode

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Abstract

Flexible Li–air batteries have been proposed as a potential power source for next-generation flexible electronics due to their super-high theoretical energy density. However, the safety problems derived from dendritic-deposition and high-activity of a Li anode and the leakage and volatilization of liquid electrolyte severely impede their practical application. Herein, we design a flexible belt-shaped Li–air battery with high stability and safety, which is constructed by using a reduced graphene oxide (rGO)/Li anode, gel polymer electrolyte containing LiI and 4 wt% SiO2 (4% SiO2–LiI-GPE). The rGO/Li anode shows lower mass density, better toughness and less dendrite growth compared with a pure Li anode. Additionally, 4% SiO2–LiI-GPE has a high ionic conductivity of 1.01 mS cm−1, flame-resistant polymer matrix, excellent protective effect on the Li anode and no-leakage properties. Furthermore, the synergy of the LiI and SiO2 additives promotes the decomposition of discharge products and improves the safety of the battery at the same time. As a result, this belt-shaped Li–air battery can steadily run for 100 cycles with a small average overpotential of ∼1.45 V in ambient air (relative humidity of 15%) under different mechanical deformations. Moreover, its voltage curves over operation could remain almost unchanged under a series of bending conditions.

Graphical abstract: A flexible polymer-based Li–air battery using a reduced graphene oxide/Li composite anode

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Supplementary files

Article information


Submitted
02 Feb 2018
Accepted
03 Mar 2018
First published
05 Mar 2018

J. Mater. Chem. A, 2018,6, 6022-6032
Article type
Paper

A flexible polymer-based Li–air battery using a reduced graphene oxide/Li composite anode

Z. Guo, J. Li, Y. Xia, C. Chen, F. Wang, A. G. Tamirat, Y. Wang, Y. Xia, L. Wang and S. Feng, J. Mater. Chem. A, 2018, 6, 6022
DOI: 10.1039/C8TA01117F

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