引用本文:
吴可, 王印萍, 王剑, 李永伟, 安平, 其鲁. 新型Li4Ti5O12/LiMn2O4体系的电化学性能[J]. 物理化学学报,
2007, 23(0): 5-9.
doi:
10.3866/PKU.WHXB2007Supp02
Citation: WU Ke, WANG Yin-Ping, WANG Jian, LI Yong-Wei, AN Ping, QI Lu. Electrochemical Performance of Novel Li4Ti5O12/LiMn2O4 System[J]. Acta Physico-Chimica Sinica, 2007, 23(0): 5-9. doi: 10.3866/PKU.WHXB2007Supp02
Citation: WU Ke, WANG Yin-Ping, WANG Jian, LI Yong-Wei, AN Ping, QI Lu. Electrochemical Performance of Novel Li4Ti5O12/LiMn2O4 System[J]. Acta Physico-Chimica Sinica, 2007, 23(0): 5-9. doi: 10.3866/PKU.WHXB2007Supp02
新型Li4Ti5O12/LiMn2O4体系的电化学性能
摘要:
开发了采用Li4Ti5O12/LiPF6/EC+EMC+DMC(质量比1:1:1)/LiMn2O4体系的18650型锂离子电池, 通过恒流充放电实验和差分计时电位分析等方法, 研究了该体系的电化学性能并测试了体系的抗过充和热滥用性能. 结果表明, 所研究体系的电池的质量比能量为60 Wh·kg-1, 能量密度为150 Wh·L-1, 电池常温1C(1000 mA)循环1000 次(100%DOD(放电深度))后容量仍保持95%以上, 60 ℃高温1C循环寿命大于250 次, 具有优异的常温和高温循环性能. 安全测试结果表明, 该体系具有良好的安全性能.
English
Electrochemical Performance of Novel Li4Ti5O12/LiMn2O4 System
Abstract:
A novel Li4Ti5O12/LiPF6/EC+EMC+DMC (1:1:1 mass ratio)/LiMn2O4 lithium battery of 18650 type was developed and the electrochemical performance of the system was investigated through constant current charge-discharge test and differential chronopotential method, the abuse tolerances of overcharge and overheat were tested as well. The results showed that the cell using this system owns 60 Wh·kg-1 specific energy and 150 Wh·L-1 power density, 95%of initial capacity retained after 100%DOD (depth of discharge)1000 cycles at 1C(1C=1000 mA) rate and more than 250 cycle life at 60 益 which indicates excellent cycle performance in both room and high temperatures. The abuse tests showed that the systemalso had od safety performance.
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