Lithium battery and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2017373304-A1
Application number	US-201715584234-A
Country	US
Kind code	A1
Filing date	May 2, 2017
Priority date	Jun 28, 2016
Publication date	Dec 28, 2017
Grant date	—

Abstract

A lithium battery includes an anode, a cathode, and a protective film disposed on at least one of the anode and the cathode, in which the protective film includes a compound including: i) at least one element selected from a Group 13 element, a Group 14 element, a Group 15 element, and a first Group 16 element; and ii) a second Group 16 element, in which the first Group 16 element is different from the second Group 16 element.

First claim

What is claimed is:

1 . A lithium battery comprising:
an anode; a cathode; and a protective film disposed between the anode and the cathode, wherein the protective film comprises a compound comprising
at least one element selected from a Group 13 element, a Group 14 element, a Group 15 element, and a first Group 16 element, and
a second Group 16 element,
wherein the first Group 16 element is different from the second Group 16 element.

2 . The lithium battery of claim 1 , wherein the second Group 16 element is Te.

3 . The lithium battery of claim 1 , wherein the Group 13 element, the Group 14 element, and the Group 15 element comprise at least one selected from B, C, N, Al, Si, P, As, In, TI, Pb, Bi, Ga, Sb, Sn, and Ge, and the first Group 16 element comprises at least one selected from Po, O, and Se.

4 . The lithium battery of claim 1 , wherein the compound comprises at least one selected from Sb a Te 1-a , Ge a Te 1-a , B a Te 1-a , C a Te 1-a , N a Te 1-a , O a Te 1-a , Al a Te 1-a , Si a Te 1-a , P a Te 1-a , Sn a Te 1-a , Ga a Te 1-a , AS a Te 1-a , Se a Te 1-a , In a Te 1-a , Sn a Te 1-a , Tl a Te 1-a , Pb a Te 1-a , Bi a Te 1-a , Po a Te 1-a , Ge a Te 1-a , and Sb a Ge b Te 1-a-b , wherein 0≦a<1 and 0≦b<1.

5 . The lithium battery of claim 4 , wherein the compound comprises at least one selected from SbTe, GeTe, BTe, CTe, NTe, OTe, AlTe, SiTe, PTe, SnTe, GaTe, AsTe, SeTe, InTe, SnTe, TITe, PbTe, BiTe, PoTe, GeTe, SnTe, and SbGeTe.

6 . The lithium battery of claim 1 , wherein an amount of the at least one element selected from the Group 13 element, the Group 14 element, and the Group 15 element and the first Group 16 element is from about 0.1 moles to about 4 moles, based on 1 mole of the second Group 16 element.

7 . The lithium battery of claim 1 , wherein the compound further comprises Li.

8 . The lithium battery of claim 7 , wherein an amount of Li is from about 0.01 parts by weight to about 20 parts by weight, based on 100 parts by weight of the compound.

9 . The lithium battery of claim 7 , wherein the compound comprises at least one selected from LiGeTe, LiSbTe, and LiSnTe.

10 . The lithium battery of claim 1 , wherein the protective film has a thickness of about 0.1 nanometer to about 30 nanometers.

11 . The lithium battery of claim 1 , wherein the protective film comprises an amorphous phase.

12 . The lithium battery of claim 11 , wherein the protective film further comprises a crystalline phase, wherein an amount of the crystalline phase is about 10 volume percent or less, based on a total volume of the protective film.

13 . The lithium battery of claim 1 , wherein the anode is a Li metal foil or a Li metal alloy foil.

14 . The lithium battery of claim 1 , wherein the lithium battery further comprises an electrolyte comprising at least one selected from a liquid electrolyte, a solid electrolyte, and a gel electrolyte.

15 . The lithium battery of claim 14 , wherein the liquid electrolyte comprises at least one selected from an organic solvent, an ionic liquid, a polymer ionic liquid, and a lithium salt.

16 . The lithium battery of claim 1 , wherein the protective film is an anode protective film.

17 . A method of manufacturing a lithium battery, the method comprising forming a protective film on a base, wherein the protective film comprises a compound comprising:
at least one element selected from a Group 13 element, a Group 14 element, a Group 15 element, and a first Group 16 element, and a second Group 16 element, wherein the first Group 16 element is different from the second Group 16 element, and wherein forming the protective film comprises depositing the compound on the base to manufacture the lithium battery.

18 . The method of claim 17 , wherein the depositing comprises at least one selected from physical vapor deposition and chemical vapor deposition.

19 . The method of claim 17 , wherein the depositing comprises sputtering.

20 . The method of claim 17 , wherein the method further comprises performing a heat treatment at about 180° C. or less after the depositing of the compound.

Assignees

• Samsung Electronics Co Ltd
• Samsung Sdi Co Ltd

Inventors

• KIM Youngeal
• Yang Wooyoung
• Kim Kihong
• Kang Hyorang

Classifications

• H01M4/366

  as layered products · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M4/0421

  involving vapour deposition · CPC title