3 years ago

Ultrafast Delamination of Graphite into High-Quality Graphene Using Alternating Currents

Ultrafast Delamination of Graphite into High-Quality Graphene Using Alternating Currents
Martin R. Lohe, Renhao Dong, Shaohua Liu, Antonio Gaetano Ricciardulli, Klaus Müllen, Sheng Yang, Alfons Becker, Marco A. Squillaci, Xinliang Feng, Paolo Samorì
To bridge the gap between laboratory-scale studies and commercial applications, mass production of high quality graphene is essential. A scalable exfoliation strategy towards the production of graphene sheets is presented that has excellent yield (ca. 75 %, 1–3 layers), low defect density (a C/O ratio of 21.2), great solution-processability, and outstanding electronic properties (a hole mobility of 430 cm2 V−1 s−1). By applying alternating currents, dual exfoliation at both graphite electrodes enables a high production rate exceeding 20 g h−1 in laboratory tests. As a cathode material for lithium storage, graphene-wrapped LiFePO4 particles deliver a high capacity of 167 mAh g−1 at 1 C rate after 500 cycles. A great alternative: A facile, cost-effective and highly efficient strategy has been developed to delaminate graphite into high-quality graphene by means of alternating currents. This procedure shows great potential to bridge the gap between laboratory-scale research and commercial applications.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201702076

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