Cyclic production of biocompatible few-layer graphene ink with in-line shear-mixing for inkjet-printed electrodes and Li-ion energy storage
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Carey, T. and Alhourani, A. and Tian, R. and Seyedin, S. and Arbab, A. and Maughan, J. and ??iller, L. and Horvath, D. and Kelly, A. and Kaur, H. and Caffrey, E. and Kim, J.M. and Hagland, H.R. and Coleman, J.N., Cyclic production of biocompatible few-layer graphene ink with in-line shear-mixing for inkjet-printed electrodes and Li-ion energy storage, npj 2D Materials and Applications, 6, 1, 2022Download Item:
Abstract:
The scalable production of two-dimensional (2D) materials is needed to accelerate their adoption to industry. In this work, we present a low-cost in-line and enclosed process of exfoliation based on high-shear mixing to create aqueous dispersions of few-layer graphene, on a large scale with a Yw ~ 100% yield by weight and throughput of φ ~ 8.3 g h−1. The in-line process minimises
basal plane defects compared to traditional beaker-based shear mixing which we attribute to a reduced Reynolds number, Re ~
105. We demonstrate highly conductive graphene material with conductivities as high as σ ∼ 1.5 × 104 S m−1 leading to sheet-
resistances as low as Rs ∼ 2.6 Ω □−1 (t ∼ 25 μm). The process is ideal for formulating non-toxic, biocompatible and highly
concentrated (c ∼ 100 mg ml−1) inks. We utilise the graphene inks for inkjet printable conductive interconnects and lithium-ion
battery anode composites that demonstrate a low-rate lithium storage capability of 370 mAh g−1, close to the theoretical capacity
of graphite. Finally, we demonstrate the biocompatibility of the graphene inks with human colon cells and human umbilical vein
endothelial cells at high c ∼ 1 mg ml−1 facilitating a route for the use of the graphene inks in applications that require
biocompatibility at high c such as electronic textiles.
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http://people.tcd.ie/colemajhttp://people.tcd.ie/careyti
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Author: Coleman, Jonathan; Carey, Tian
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npj 2D Materials and Applications6
1
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http://dx.doi.org/10.1038/s41699-021-00279-0Metadata
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