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Ultrafast Delamination of Graphite into High‐Quality Graphene Using Alternating Currents
Author(s) -
Yang Sheng,
Ricciardulli Antonio Gaetano,
Liu Shaohua,
Dong Renhao,
Lohe Martin R.,
Becker Alfons,
Squillaci Marco A.,
Samorì Paolo,
Müllen Klaus,
Feng Xinliang
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201702076
Subject(s) - graphene , materials science , exfoliation joint , graphite , delamination (geology) , yield (engineering) , cathode , lithium (medication) , composite material , nanotechnology , electrode , optoelectronics , electrical engineering , chemistry , medicine , paleontology , engineering , endocrinology , biology , subduction , tectonics
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 cm 2 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 LiFePO 4 particles deliver a high capacity of 167 mAh g −1 at 1 C rate after 500 cycles.