Nano-Graphite Prepared by Rapid Pulverization as Anode for Lithium-Ion Batteries

Abstract

Reducing the particle size of active material is an effective solution to the poor rate performance of the lithium-ion battery. In this study, we proposed a facile strategy for the preparation of nano-graphite as an anode for a lithium-ion battery via the rapid mechanical pulverization method. It is the first time that diamond particle was selected as the medium to achieve high preparation efficiency and low energy consumption. The as-prepared nano-graphite with the size from 10 to 300 nm displays an intact structure and high specific surface area. The introduced oxygen atoms increased the wettability of nano-graphite electrode and lowered its polarization. The nano-graphite prepared from three hours of grinding shows an excellent reversible capacity of 191 mAh g−1, at a rate of 5 C, after 480 cycles, along with an increase of 86% in capacity, at 1 C, in comparison with pristine graphite. The highlight of this strategy is to optimize the current preparation method. The good electrochemical performance comes from the combined effect of nano-scale particle size, large specific surface area, and continuous mesopores.

The synergistic improvement in mechanical strength and toughness obtained in epoxy‐based composites incorporating with carbon nanotubes‐polymer hybrid construction

“…As shown in Figure 1, the as‐prepared CNT/BMI composites were freezing‐pulverized (1600 W, 3000 rpm, 2 min) in a liquid nitrogen environment maintained 39–41 . The whole low‐temperature pulverization process was repeated four times.…”

“…As shown in Figure 1, the as-prepared CNT/BMI composites were freezing-pulverized (1600 W, 3000 rpm, 2 min) in a liquid nitrogen environment maintained. [39][40][41] The whole low-temperature pulverization process was repeated four times. The morphologically stable CBH were obtained after finely sieving the as-milled CNT/BMI particles through a standard sieve (70 μm).…”

Fast-charging anodes for lithium ion batteries: progress and challenges

“…3a). 72 Compared to untreated micron graphite, the capacity and rate performance of nano graphite anodes were significantly enhanced. However, the nanoscale process significantly increased the specific surface area of graphite and introduced a large number of defects, which exacerbated the side reactions between the electrode and the electrolyte.…”

Recent status, key strategies and challenging perspectives of fast-charging graphite anodes for lithium-ion batteries

“…Nevertheless, its limited lithiumion active sites and diffusion channels result in poor rate performance. 200,201 Liu et al proved that the electrical properties of graphite anodes could be greatly influenced by the particle size distribution and particle orientation. 202 Similarly, by reducing the size of graphite, lower diffusion resistance and higher reversible capacity can be achieved, as reported by Chen et al 203 Apart from the design of particle size, spherification is also the most commonly used modification strategy to improve internal ion diffusion.…”