Directing Silicon–Graphene Self-Assembly as a Core/Shell Anode for High-Performance Lithium-Ion Batteries

Citations Over TimeTop 1% of 2012 papers

Abstract

There is great interest in utilization of silicon-containing nanostructures as anode materials for lithium-ion batteries but usually limited by manufacturing cost, their intrinsic low electric conductivity, and large volume changes during cycling. Here we present a facile process to fabricate graphene-wrapped silicon nanowires (GNS@Si NWs) directed by electrostatic self-assembly. The highly conductive and mechanical flexible graphene could partially accommodate the large volume change associated with the conversion reaction and also contributed to the enhanced electronic conductivity. The as-prepared GNS@Si NWs delivered a reversible capacity of 1648 mAh·g(-1) with an initial Coulombic efficiency as high as 80%. Moreover, capacity remained 1335 mAh·g(-1) after 80 cycles at a current of 200 mA·g(-1), showing significantly improved electrochemical performance in terms of rate capability and cycling performance.

Related Papers

• → Electrochemistry of graphene, graphene oxide and other graphenoids: Review(2013)266 cited
• → Orthotropic friction at the edges and interior of graphene and graphene fluoride and frictional anisotropy of graphene at the nanoscale(2021)1 cited
• A natural advantage? Using mined graphite to make graphene(2013)
• Synthesis and Characterisation of Graphene Single Sheets(2012)
• Unique synthesis of graphene-based materials for clean energy and biological sensing applications(2012)