Morphology Control of Polymer Electrolytes

摘要

@@1.Introduction Lithium ion batteries present dominant advantages over traditional rechargeable battery systems [1] However, their safety becomes a major focus since there are a lot of reports on fire and explosion. The main problem is the use of organic liquid electrolytes. In addition, lithium ion batteries are of great promise as power sources for electric vehicles to increase the utilization efficiency of energy and reduce the emission of CO2, the safety issue will be of great concern. If liquid electrolyte can be substituted by polymer electrolytes, the safety will be greatly improved. Polymer electrolytes are divided into two kinds: true solid and gelled ones. Research on the former began in the early of 1970s. However, the ionic conductivity is very difficult to arrive at the level for commercial application, about 10-3 S/cm. As a result, the main focus was shifted to the latter one recently. The latter comprises of high ionic conductivity of liquid electrolyte and good safety of true solid polymer electrolyte [2] In order to prepare gelled polymer electrolytes for commercial application, the morphology is one crucial factor to control. Here we reported our result on this aspect.