High capacity silicon anodes enabled by MXene viscous aqueous ink

Chuanfang (John) Zhang (), Sang-Hoon Park, Andrés Seral‐Ascaso, Sebastian Barwich, Niall McEvoy, Conor S. Boland, Jonathan N. Coleman (), Yury Gogotsi () and Valeria Nicolosi ()
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Chuanfang (John) Zhang: Trinity College Dublin
Sang-Hoon Park: Trinity College Dublin
Andrés Seral‐Ascaso: Trinity College Dublin
Sebastian Barwich: Trinity College Dublin
Niall McEvoy: Trinity College Dublin
Conor S. Boland: Trinity College Dublin
Jonathan N. Coleman: Trinity College Dublin
Yury Gogotsi: Drexel University
Valeria Nicolosi: Trinity College Dublin

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract The ever-increasing demands for advanced lithium-ion batteries have greatly stimulated the quest for robust electrodes with a high areal capacity. Producing thick electrodes from a high-performance active material would maximize this parameter. However, above a critical thickness, solution-processed films typically encounter electrical/mechanical problems, limiting the achievable areal capacity and rate performance as a result. Herein, we show that two-dimensional titanium carbide or carbonitride nanosheets, known as MXenes, can be used as a conductive binder for silicon electrodes produced by a simple and scalable slurry-casting technique without the need of any other additives. The nanosheets form a continuous metallic network, enable fast charge transport and provide good mechanical reinforcement for the thick electrode (up to 450 µm). Consequently, very high areal capacity anodes (up to 23.3 mAh cm−2) have been demonstrated.

Date: 2019
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DOI: 10.1038/s41467-019-08383-y

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