Abstract
The gases of polymer lithium-ion battery (PLI) generated under different voltages during the first charging process were examined by means of gas chromatography (GC), and the mechanism of the gas generation was discussed. The electrolyte used in batteries was 1 mol/L LiPF6-EC～DMC～EMC=1∶1∶1(in volume). The results showed that when the charging voltage is less than 2.5 V, the main component of generated gases are H2 and CO2, and when the charging voltage is 2.5 V, EC begins to decompose. Due to the decomposition of EC, the main generated gas is C2H4 when the charge voltages between 3.0 V and 3.5 V. As the voltage is higher than 3.0 V, the generated gases composed of C2H4 as well as CH4 and C2H6. The later are caused by the decomposition of DMC and EMC. When the charging voltage is higher than 3.8V, the decomposition of DMC and EMC becomes dominant. Furthermore, when the voltages are between 3.0 V and 3.5 V, the volumes of generated gases are the most. Since the solid electrolyte interface (SEI) on the surface of carbon electrode has been formed, while the charging voltage higher than 3.5 V, the decomposition of the electrolyte slowed down and then restrained, and the volume of the generated gases decreased quickly.
Keywords
Polymer lithium ion battery, Formation, Gas generation, SEI
Publication Date
2003-11-28
Online Available Date
2003-11-28
Revised Date
2003-11-20
Received Date
2003-05-12
Recommended Citation
Li HUANG, Ming-gang JIN, Hui-qun CAI, Ming-sen ZHENG, Quan-feng DONG, Jin-kua YOU, Zu-geng LIN.
Study on the Gas Generation in Different Charging Voltage during Formation Process in Polymer Lithium-ion Battery[J]. Journal of Electrochemistry,
2003
,
9(4): 387-392.
DOI: 10.61558/2993-074X.1522
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol9/iss4/2
Included in
Engineering Science and Materials Commons, Materials Chemistry Commons, Materials Science and Engineering Commons, Physical Chemistry Commons, Power and Energy Commons
