Preparation Assisted via Thermal Stress and Electrochemical Performance of Graphene Nano-Sheets as Anode Materials for Lithium-Ion Batteries

Abstract

Via a simple thermal stress assist process, the high-quality graphene was successfully obtained. The microstructure, morphology and the electrochemical performance of the as-prepared products were characterized by x-ray diffraction (XRD), field emission environment scanning electron microscope (SEM), Micro-Raman Spectroscopy System, element analysis system and LAND battery program-control test system respectively. The results show that the as-prepared products are uniform graphene nano-sheets (GNs) with large and smooth surface, and that the GNs, as an anode material for lithium-ion cell, exhibit good cyclic performance, which imply that the lithium ions and GNs have formed a relative stable structure to large degree. A possible form mechanism of the high-quality GNs is proposed.

Keywords:

• Graphene nano-sheets
• thermal stress assist
• electrochemical performance
• lithium-ion batteries