Ultrafine layered graphite as an anode material for lithium ion batteries

Abstract

Ultrafine layered graphite was prepared by jet impinging apparatus to reduce the size of graphite. The results showed that graphite formed a unique assembled structure with more exposed gaps and defects. As the anode material for lithium ion batteries, the ultrafine layered graphite showed a lower diffusion resistance compared with traditional graphite. In addition, ultrafine layered graphite electrodes displayed a higher reversible capacity of 393 mAh g−1 compared to the 345 mAh g−1 of traditional graphite electrodes and offered better cycling performance, retaining 78% of the initial reversible capacity after 800 cycles at rate 5 C. This exciting discovery based on decreasing graphite particle diameter may provide some novel ideas for improving the performance of graphite electrodes.