Characteristics of LiFePO4/C composite prepared by sonochemical method under multibubble sonoluminescence
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- 作者：Ki-Moon Kang ; Hyo-Won Kim ; Ho-Young Kwak
- 关键词：Lithium Iron Phosphate ; Multibubble Sonoluminescence ; Carbon Nanotube ; Initial Discharge Capacity ; First Efficiency ; Cathode Material
- 刊名：Korean Journal of Chemical Engineering
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：33
- 期：2
- 页码：688-696
- 全文大小：1,333 KB
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Hyo-Won Kim (1)
Ho-Young Kwak (1)
1. Mechanical Engineering Department, Chung-Ang University, Seoul, 06911, Korea - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Industrial Chemistry and Chemical Engineering
Catalysis
Materials Science
Biotechnology - 出版者：Springer New York
- ISSN：1975-7220
文摘
LiFePO4/C composites with various weight percent of carbon nanotubes (CNT) were prepared through one-pot sonochemical method under the condition of multibubble sonoluminescence (MBSL). The electrical performance of the composites depends crucially on ultrasound irradiation time, the calcination temperature and duration and weight percent of CNTs. The best initial discharge capacity was obtained for a calcination temperature of 650 °C for 6 h, 30minutes ultrasound irradiation and with 2 wt% of CNTs. The electric conductivity of the LiFePO4/C composite with 2 wt% CNTs was approximately 3.4·10−4 S/cm. The coin cell made of LiFePO4/C composite whose average diameter is 683 nm exhibits an initial discharge capacity of 142mAh/g at 0.1 C, a flat and long voltage plateau and low ΔV between the initial charge and discharge plateaus of 0.03 V and small fade rate of capacity of 0.08% per cycle at 0.5 C. The first efficiency, the ratio of the initial discharge to the initial charge capacity, of the LiFePO4/C composite, is about 90%. Keywords Lithium Iron Phosphate Multibubble Sonoluminescence Carbon Nanotube Initial Discharge Capacity First Efficiency Cathode Material