ABSTRACT
Electrochemical energy devices, such as secondary batteries and electric double layercapacitors,havealreadybeenwidelyusedasanenergystoragedeviceforvariousportableelectronicdevices.Sincethedevelopmentofthelithium-ionbattery (LIB),itshigherenergystorageabilityhasenableditslongtimeoperationandalso itsminiaturizationandweightreduction,whichhasprovidedagreaterconvenience in our daily life. Not only small devices but also much larger electric vehicles signi›- cantlydependontheresearchanddevelopmentofLIBswithahighcapacity.Oneof theimportantfeaturesofLIBscomparedtovariousothersecondarybatteries,such asthelead-acidbatteryandnickel-metalhydridebattery,isthehigheroutputcell voltage(over4V).Torealizethishighcellvoltage,organicsolventswithanelectrochemical stability, such as carbonate solvents, have been used as the electrolyte mediainsteadofwater.1 However, developing new electrolytes has always been necessarytoimprovethesafetyissueoftheLIBbecausethetypicalorganicsolventsare generally»ammableliquids.Ontheotherhand,theresearchanddevelopmentofa post-LIB,suchasthelithium-air(Li-air)battery,lithium-sulfur(Li-S)battery,and
10.1 Introduction ..................................................................................................285 10.2Conventional Electrolyte for a Lithium-Ion Battery .....................................286 10.3New Electrolyte System Based on Zero Solvent ..........................................287
