In-situ fabrication of lithium polymer battery basing on a novel electro-polymerization technique
Electro-polymerization technology is proposed for the in-situ fabrication of polymer lithium secondary battery and exciting results have been obtained. The polymerization starts from a common used electrolyte of 1M LiTFSI in DOL/DME (2:1 by weight) with no initiator addition through a routine charge-discharge treatment under some appointed current rate. Its found that once an appropriate current is applied in the charging-discharging of Li/1M LiTFSI in DOL+DME/LiCoO<,2> cell, the original liquid electrolyte polymerizes readily during the first several cycles in an irreversible mode, and thus the desired polymer electrolyte obtained. SEM observation indicates that unlike previous report, the designed electro-polymerization doesnt result in destructive local break and then turnoff of the circuit, just the reverse; it helps to the formation of a smooth polymer layer, which can effectively protect the lithium substrate from corrosion and dendrite growth. Detailed examination shows that the in-situ electro- polymerization doesnt disturb the electrochemical behavior of the cell, the cycleabilty, internal resistance are all comparable to that of a normal Li/LiCoO<,2> liquid secondary battery.
in-situ fabrication electro-polymerization technology lithium polymer battery DOL internal resistance
Lingbo Kong Hui Zhan Yajuan Li Yunhong Zhou
Department of Chemistry, Wuhan Univ., 430072, China
国际会议
第二届亚洲化学电源会议(Second Asian Conference on Electrochemical Power Sources)
上海
英文
84
2007-10-21（万方平台首次上网日期，不代表论文的发表时间）