Heat Treatment Conditions of Polyparaphenylene-based Carbon for Negative Electrode of Lithium Ion Secondary Batteries

Nano structure of low crystallinity carbon materials analyzed by using high energy X-ray diffraction

“…In the data of 900°C sample, the peak at 1.2 nm was extinguished and the other peaks have appeared. When PPP-based carbon heat treated 720°C with one hour residence time is used for the electrode of Li ion battery, the highest discharge capacity at second cycle was obtained [10]. So, the pores of size around 1.2 nm seem to have relation to insertion mechanism of Li ions, since the sample heat treated at 720°C has the highest pore size distribution of this size.…”

Characteristics of heat treated polyparaphenylene for lithium-ion secondary batteries

“…In a previous paper [6] we reported that high chargedischarge capacity was obtained for PPP heat treated at 720 8C for 1 h. So we performed TGA in the same conditions, from room temperature to 720 8C with a heating rate of 10 8C/min as shown in Fig. 3(d), to study the influence of the residence time on the PPP heat treatment process.…”

“…In a previous study, we used PPP made by Kovacic method for the negative electrode of Li-ion batteries and we reported that the highest charge -discharge capacity was obtained with PPP heat treated at 720 8C for 1 h in pure argon gas flow [6]. High discharge capacities over 500 mAh/g (second and higher cycles) were obtained.…”