Polymer electrolyte for lithium secondary battery and lithium secondary battery including the same

Patent metadata

Field	Value
Publication number	US-10637098-B2
Application number	US-201715416614-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Jan 29, 2016
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A polymer electrolyte for a lithium secondary battery includes a polymer represented by Formula 1 below,

wherein a and b are each independently an integer from 1 to 5, and n is an integer from 1 to 1,000. A lithium secondary battery includes the polymer electrolyte.

First claim

What is claimed is:

1. A polymer electrolyte for a lithium secondary battery, the polymer electrolyte comprising polyethylene ether carbonate having a weight average molecular weight of 2,000 g/mol or greater, the polyethylene ether carbonate being represented by Formula 2 below:

wherein n is an integer from about 100 to 1,000.

2. The polymer electrolyte for a lithium secondary battery as claimed in claim 1 , wherein an amount of the polyethylene ether carbonate is in the range of about 20 to about 99 parts by weight based on 100 parts by weight of the polymer electrolyte.

3. The polymer electrolyte for a lithium secondary battery as claimed in claim 1 , wherein the polymer electrolyte includes a lithium salt.

4. The polymer electrolyte for a lithium secondary battery as claimed in claim 3 , wherein the lithium salt includes at least one selected from LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiN(SO 2 C 2 F 5 ) 2 , Li(CF 3 SO 2 ) 2 N, LiC 4 F 9 SO 3 , LiClO 4 , LiAlO 2 , LiAlCl 4 , LiN(C x F 2x+1 SO 2 )(C y F 2y+1 SO 2 ), in which x and y are natural numbers, LiF, LiBr, LiCl, LiOH, LiI, LiB(C 2 O 4 ) 2 (lithium bis(oxalato) borate (LiBOB)), Li(FSO 2 ) 2 N, Li(CF 3 SO 2 ) 2 N, Li(C 2 F 5 SO 2 ) 2 N, LiN(C p F 2p+1 SO 2 )(CqF 2q+1 SO 2 ), in which p and q are different and each independently an integer from 1 to 20, LiN((SO 2 ) 2 C p F 2p ), in which p is an integer from 1 to 10, Li(C 6 F 5 SO 2 ) 2 N, Li(C 10 F 7 SO 2 ) 2 N, Li(C 6 F 5 SO 2 )(C 10 F 7 SO 2 )N, LiN(C 6 F 5 SO 2 )(C p F 2p+1 SO 2 ), in which p is an integer from 1 to 10, and LiN(C 10 F 7 SO 2 )(C p F 2p+1 SO 2 ), in which p is an integer from 1 to 10.

5. The polymer electrolyte for a lithium secondary battery as claimed in claim 1 , wherein the polymer electrolyte further includes non-ion-conductive inorganic particles or ion-conductive inorganic particles.

6. The polymer electrolyte for a lithium secondary battery as claimed in claim 5 , wherein:
the electrolyte includes the non-ion-conductive particles, and
the non-ion-conductive inorganic particles include at least one selected from SiO 2 , TiO 2 , ZnO, Al 2 O 3 , BaTiO 3 , Pb(Zr,Ti)O 3 (PZT), Pb 1−x La x Zr 1−y Ti y O 3 (PLZT), in which 0≤x<1, and 0≤y<1, PB(Mg 3 Nb 2/3 )O 3 —PbTiO 3 (PMN-PT), HfO 2 , SrTiO 3 , SnO 2 , CeO 2 , Na 2 O, MgO, NiO, CaO, BaO, ZrO 2 , Y 2 O 3 , SiC, lithium phosphate (Li 3 PO 4 ), and BaTiO 3 .

7. The polymer electrolyte for a lithium secondary battery as claimed in claim 5 , wherein an amount of the non-ion-conductive inorganic particles or ion-conductive inorganic particles is in the range of about 1 to about 40 parts by weight based on 100 parts by weight of the polymer electrolyte.

8. The polymer electrolyte for a lithium secondary battery as claimed in claim 5 , wherein:
the electrolyte includes the ion-conductive particles, and
the ion-conductive inorganic particles include at least one selected from a glassy active metal ion conductor, an amorphous active metal ion conductor, a ceramic active metal ion conductor, and a glass-ceramic active metal ion conductor or a combination thereof.

9. The polymer electrolyte for a lithium secondary battery as claimed in claim 8 , wherein the ion-conductive inorganic particles include Li 1+x+y Al x Ti 2−x Si y P 3−y O 12 , in which 0<x<2 and 0≤y<3, lithium titanium phosphate Li x Ti y (PO 4 ) 3 , in which 0<x<2, and 0<y<3, lithium aluminum titanium phosphate Li x Al y Ti z (PO 4 ) 3 , in which 0<x<2, 0≤y<1, and 0<z<3, Li 1+x+y (Al, Ga) x (Ti, Ge) 2−x Si y P 3−y O 12 , in which 0≤x≤1 and 0≤y≤1, lithium lanthanum titanate (Li x La y TiO 3 ), in which 0<x<2, and 0<y<3, lithium germanium thiophosphate (Li x Ge y P z S w ), in which 0<x<4, 0<y<1, 0<z<1, and 0<w<5, lithium nitride (Li x N y ), in which 0<x<4, and 0<y<2, SiS 2 (Li x Si y S z ) type glass, in which 0<x<3, 0<y<2, and 0<z<4, P 2 S 5 (Li x P y S z ) type glass, in which 0<x<3, 0<y<3, and 0<z<7, Li 2 O, LiF, LiOH, Li 2 CO 3 , LiAlO 2 , Li 2 O—Al 2 O 3 —SiO 2 —P 2 O 5 —TiO 2 —GeO 2 -based ceramics, garnet-based ceramics (Li 3+x La 3 M 2 O 12 ), in which 0≤x≤5, and M=Te, Nb, or Zr, or a combination thereof.

10. A lithium secondary battery comprising the polymer electrolyte as claimed in claim 1 .

11. The lithium secondary battery as claimed in claim 10 , wherein an amount of the polyethylene ether carbonate is in the range of about 20 to about 99 parts by weight based on 100 parts by weight of the polymer electrolyte.

12. The lithium secondary battery as claimed in claim 10 , wherein the polymer electrolyte includes a lithium salt.

13. The lithium secondary battery as claimed in claim 12 , wherein the lithium salt includes at least one selected from LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiN(SO 2 C 2 F 5 ) 2 , Li(CF 3 SO 2 ) 2 N, LiC 4 F 9 SO 3 , LiClO 4 , LiAlO 2 , LiAlCl 4 , LiN(C x F 2x+1 SO 2 )(C y F 2y+1 SO 2 ), in which x and y are natural numbers, LiF, LiBr, LiCl, LiOH, LiI, LiB(C 2 O 4 ) 2 (lithium bis(oxalato) borate (LiBOB)), Li(FSO 2 ) 2 N, Li(CF 3 SO 2 ) 2 N, Li(C 2 F 5 SO 2 ) 2 N, LiN(C p F 2p+1 SO 2 )(C q F 2q+1 SO 2 ), in which p and q are different and each independently an integer from 1 to 20, LiN((SO 2 ) 2 C p F 2p ), in which p is an integer from 1 to 10, Li(C 6 F 5 SO 2 ) 2 N, Li(C 10 F 7 SO 2 ) 2 N, Li(C 6 F 5 SO 2 )(C 10 F 7 SO 2 )N, LiN(C 6 F 5 SO 2 )(C p F 2p+1 SO 2 ), in which p is an integer from 1 to 10, and LiN(C 10 F 7 SO 2 )(C p F 2p+1 SO 2 ), in which p is an integer from 1 to 10.

14. The lithium secondary battery as claimed in claim 10 , wherein:
the polymer electrolyte further includes non-ion-conductive inorganic particles or ion-conductive inorganic particles, and
an amount of the non-ion-conductive inorganic particles or ion-conductive inorganic particles is in the range of about 1 to about 40 parts by weight based on 100 parts by weight of the polymer electrolyte.

15. The lithium secondary battery as claimed in claim 14 , wherein:
the polymer electrolyte includes the non-ion-conductive inorganic particles and the ion-conductive inorganic particles,
the non-ion-conductive inorganic particles include at least one selected from SiO 2 , TiO 2 , ZnO, Al 2 O 3 , BaTiO 3 , Pb(Zr,Ti) 03 (PZT), Pb 1−x La x Zr 1−y Ti y O 3 (PLZT), in which 0≤x≤1, and 0≤y<1, PB(Mg 3 Nb 2/3 )O 3 —PbTiO 3 (PMN-PT), HfO 2 , SrTiO 3 , SnO 2 , CeO 2 , Na 2 O, MgO, NiO, CaO, BaO, ZrO 2 , Y 2 O 3 , SiC, lithium phosphate (Li 3 PO 4 ), and BaTiO 3 , and
the ion-conductive inorganic particles include at least one selected from a glassy active metal ion conductor, an amorphous active metal ion conductor, a ceramic active metal ion conductor, and a glass-ceramic active metal ion conductor or a combination thereof.

16. The lithium secondary battery as claimed in claim 14 , wherein the ion-conductive inorganic particles include Li 1+x+y Al x Ti 2−x Si y P 3−y O 12 , in which 0<x<2 and 0≤y<3, lithium titanium phosphate (Li x Ti y (PO 4 ) 3 , in which 0<x<2, and 0<y<3, lithium aluminum titanium phosphate (Li x Al y Ti z (PO 4 ) 3 , in which 0<x<2, 0<y<1, and 0<z<3, Li 1+x+y (Al, Ga) x (Ti, Ge) 2−x Si y P 3−y O 12 , in which 0≤x≤1 and 0≤y≤1, lithium lanthanum titanate (Li x La y TiO 3 ), in which 0<x<2, and 0<y<3, lithium germanium thiophosphate (Li x Ge y P z S w ), in which 0<x<4, 0<y<1, 0<z<1, and 0<w<5, lithium nitride (Li x N y ), in which 0<x<4, and 0<y<2, SiS 2 (Li x Si y S z ) type glass, in which 0<x<3, 0<y<2, and 0<z<4, P 2 S 5 (Li x P y S z ) type glass, in which 0<x<3, 0<y<3, and 0<z<7, Li 2 O, LiF, LiOH, Li 2 CO 3 , LiAlO 2 , Li 2 O—Al 2 O 3 —S

Assignees

• Samsung Sdi Co Ltd
• Iucf Hyu
• Univ Hanyang Ind Univ Coop Found

Inventors

• Kim Duck Hyun
• YOO Hee Eun
• KWON Tae Ri
• Bae Tae Hyun
• Cha Si Young
• Lee Min Ju
• Kwon Il Kyoung
• Shin Woo Cheol
• Kim Dong Won
• Jung Yun Chae

Classifications

• H01M2300/0082

  Organic polymers · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0565 Primary

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title