Preparation and characterization of flexible lithium iron phosphate/graphene/cellulose electrode for lithium ion batteries.

Author(s) Wang, Y.; He, Z.Y.; Wang, Y.X.; Fan, C.; Liu, C.R.L.; Peng, Q.L.; Chen, J.J.; Feng, Z.S.
Journal J Colloid Interface Sci
Date Published 2018 Feb 15

In this work, a free-standing flexible composite electrode was prepared by vacuum filtration method with LiFePO4, graphene and nanofibrillated cellulose (NFC). Compared with the pure LiFePO4 electrode, the resulting flexible composite (LiFePO4/graphene/NFC) electrode showed excellent mechanical flexibility, and possessed an enhanced initial discharge capacity of 151 mA h/g (0.1 C) and a good capacity retention rate with only 5% loss after 60 cycles due to suitable electrolyte wettability at the interface. Furthermore, the NFC and graphene formed a three-dimensional conductive framework, which provided high-speed electron conduction in the composite and reduced electrode polarization during charging-discharging processes. Moreover, the composite electrode could endure bending tests up to 1000 times, highlighting preferable mechanical strength and durability. These results demonstrated that the as-fabricated electrodes could be applied as flexible electrodes with an embedded power supply.

DOI 10.1016/j.jcis.2017.10.042
ISSN 1095-7103
Citation J Colloid Interface Sci. 2018;512:398403.

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