Details

Autor(en) / Beteiligte

• Jing, Mao-xiang
• Zhai, Hong-ai
• Pi, Zhi-chao
• Li, Jing-quan
• Chen, Li-li
• Shen, Xiang-qian
• Xi, Xiao-ming
• Xiao, Ke-song

Titel

High loading LiFePO4 on activated carbon fiber cloth as a high capacity cathode for Li-ion battery

Ist Teil von

• Russian journal of applied chemistry, 2016-07, Vol.89 (7), p.1183-1188

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2016

Quelle

SpringerLink

Beschreibungen/Notizen

• The LiFePO 4 /carbon fiber (LFP/CF) cathodes were prepared by using activated carbon fiber cloth as current collector in place of conventional Al foil. The electrochemical properties of LFP/CF electrodes were analyzed by the cyclic voltammetry and galvanostatic charge/discharge tests. The results indicate that the activated carbon fiber cloth with high specific surface area and high porosity makes the LFP/CF electrode that possesses higher mass loading of 18–21 mg cm –2 and stronger redox reaction ability compared with Al foil-based electrode. The LFP/CF electrode shows excellent rate performance and cycle stability. At 0.1C, the discharge capacity is up to 190.1 mAh g –1 that exceeds the theoretical capacity due to the combination effect of battery and capacitor. Furthermore, the LFP/CF electrode shows an initial capacity of 150.4 mAh g –1 at 1C with a capacity retention of 74.7% after 425 cycles, which is higher than 62.4% for LFP/Al foil electrode, and an initial discharge capacity of 130 mAh g –1 at 5C with a capacity retention of 61.5% after 370 cycles. But this composite electrode is not suitable for charging/discharging at higher rate as 10C due to too much mass loading.