A Tunable Molten-Salt Route for Scalable Synthesis of Ultrathin Amorphous Carbon Nanosheets as High-Performance Anode Materials for Lithium-Ion Batteries

• DOI: 10.1021/acsami.7b18313
• Publication Date: 2018-01-18T22:18:42Z
• Authors: Yixian Wang; Wei Tian; Luhai Wang; Haoran Zhang; Jialiang Liu; Tingyue Peng; Lei Pan; Xiaobo Wang; Mingbo Wu
• Keywords: Carbon fibers

Amorphous carbon is regarded as a promising alternative to commercial graphite the lithium-ion battery anode due its capability reversibly store more lithium ions. However, structural disorder with large number of defects can lead low electrical conductivity amorphous carbon, thus limiting application for high power output. Herein, ultrathin nanosheets were prepared from petroleum asphalt through tuning carbonization temperature in molten-salt medium. The nanostructure expanded interlayer spacing provide substantial active sites storage, while two-dimensional (2D) morphology facilitate fast conductivity. As result, electrodes deliver reversible capacity, outstanding rate capability, and superior cycling performance (579 396 mAh g–1 at 2 5 A after 900 cycles). Furthermore, full cells consisting anodes coupled LiMn2O4 cathodes exhibit specific capacity (608 50 mA g–1) impressive stability slow loss (0.16% per cycle 200 g–1). present study not only paves way industrial-scale synthesis advanced materials batteries but also deepens fundamental understanding intrinsic mechanism method.