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US 7,351,501 B2Granted
Electrolyte for rechargeable lithium battery and rechargeable lithium battery comprising same
AssigneeSamsung SDI Co., Ltd.
InventorsCheol-Soo Jung, Takitaro Yamaguchi, Ryuichi Shimizu
Life of this patent
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Abstract
Disclosed is a non-aqueous electrolyte for a rechargeable lithium battery including a polyether-modified silicon oil in which a polyether chain is bonded to a terminal end of a linear polysiloxane, a cyclic carbonate, and a lithium salt.
Claims16
A non-aqueous electrolyte comprising:
- a cyclic carbonate;
- a lithium salt;
- and
- a polyether-modified silicon oil represented by formula 1 in which a polyether chain is bonded to a terminal end of a linear polysiloxane chain, the polyether-modified silicon oil having a viscosity of less than 10cSt at 25° C.:
- where k is an integer from 0 to 10;
- m is a natural number from 2 to 4;
- n is a natural number from 1 to 4;
- R1 to R7 are independently or identically, selected from hydrogen or C1 to C5 alkyls;
- and Z is CH3 or C2H5.
6 more elements
A rechargeable lithium battery comprising:
- a positive electrode;
- a negative electrode;
- and
- a non-aqueous electrolyte comprising:
- a polyether-modified silicon oil represented by formula 1 in which a polyether chain is bonded to a terminal end of a linear polysiloxane chain, the polyether-modified silicon oil having a viscosity of less than 10cSt at 25° C.,
- a cyclic carbonates, and
- a lithium salt:
- where k is an integer from 0 to 10;
- m is a natural number from 2 to 4;
- n is a natural number from 1 to 4;
- R1 to R7 are independently or identically, selected from hydrogen or C1 to C5alkyls;
- and Z is CH3 or C2H5.
9 more elements
An electrolyte for a rechargeable lithium battery comprising:
- a polyether-modified silicon oil having a viscosity of less than 10 cSt at 25° C., a cyclic carbonate, and a lithium salt, wherein the polyether-modified silicon oil includes end silicons, wherein each end Si atom includes a terminal bond to a polyether group.
A rechargeable lithium battery comprising:
- a positive electrode;
- a negative electrode;
- and
- an electrolyte comprising a polyether-modified silicon oil having a viscosity of less than includes end silicons with terminal bonds consisting of Si-C or Si-H bonds and wherein each end Si atom includes a terminal bond to a polyether group.
1 more element
Dependencies are inferred from the claim text.