High capacity silicon anodes enabled by MXene viscous aqueous ink

Zhang, Chuanfang (John), Park, Sang-Hoon, Seral‐Ascaso, Andrés, Barwich, Sebastian, McEvoy, Niall, Boland, Conor S, Coleman, Jonathan N, Gogotsi, Yury and Nicolosi, Valeria (2019) High capacity silicon anodes enabled by MXene viscous aqueous ink. Nature Communications, 10 (1). 849 1-9. ISSN 2041-1723

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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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Materials Physics Group
Subjects: Q Science > QC Physics
Depositing User: Alice Jackson
Date Deposited: 24 Jun 2019 15:05
Last Modified: 01 Jul 2019 12:01
URI: http://sro.sussex.ac.uk/id/eprint/84479

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