EC: 优点High polarity and an essential component for SEI formation of graphite.缺点：High mp and poor miscibility with linear alkyl carbonate, both of  which  results in a high freeing point.
PC:优点：Low mp and excellent miscibility with EC, which lowers freezing temperature.缺点：High viscosity and poor SEI formation due to co-intercalating and decomposing
DMC：优点Excellent wettability with Celgard membrane and good for SEI formation.缺点：High mp and poor miscibility with EC
DEC：优点Excellent wettability with Celgard membrane and lowest mp。缺点Poor chemical stability with lithiated graphite and least miscibility with EC
EMC优点：Best combitation of the mp, wettability, and cell performace。缺点：Insufficient miscibility with EC to form very low freezing piont

通常用于锂离子电池电解液体系的溶剂，是由低粘度的溶剂（如DMC、DEC、DME、EMC 等）和高介电常数的溶剂（如EC、PC等）按一定的比例混合而成的复合溶剂，从而保证导电锂盐在溶剂中有足够的溶解度和良好的离子解离度。

关于你说的锂离子电池电解液的分解温度和分解电压，这要看是哪种配比的电解液了，我认为分解温度可以用DSC测，