Lithium-ion non-aqueous battery electrolyte solution, and lithium-ion battery using the electrolyte solution

• US 10,644,352 B2
• Filed: 12/29/2016
• Issued: 05/05/2020
• Est. Priority Date: 07/08/2016
• Status: Active Grant

• Current Assignee: Shenzhen Capchem Technology Co., Ltd.
• Original Assignee: Shenzhen Capchem Technology Co., Ltd.
• Inventors: Zheng, Zhongtian, Shi, Qiao, Zhong, Ling, Hu, Shiguang, Chen, Changchun, Lin, Xionggui
• Primary Examiner(s): Usyatinsky, Alexander
• Application Number:
  US16/085,067
• Publication Number:
  US 20190081354A1
• Time in Patent Office: 1,223 Days
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0566 Liquid materials
• CPC Class Codes: H01M 10/0567 characterised by the additives
• CPC Class Codes: H01M 2300/0025 Organic electrolyte
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 4/5825 Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A lithium-ion battery non-aqueous electrolyte solution, and a lithium-ion battery using the electrolyte solution. The electrolyte solution comprises one, two, or more of a compound as represented by structural formula I. R₁, R₂, R₃, R₄, R₅, and R₆ are independently selected from hydrogen, halogen atom, or a group comprising 1-5 carbon atoms. Presence of the compound as represented by structural formula I provides excellent performance at a high temperature and at a low temperature to the non-aqueous lithium-ion battery electrolyte solution.

Claims

1. A non-aqueous electrolyte for a lithium-ion battery, comprising one or more of a compound represented by Structural Formula 1,

2. The non-aqueous electrolyte for a lithium-ion battery according to claim 1, wherein R₁, R₂, R₃, R₄, R₅, and R₆ are each independently selected from a hydrogen atom, a fluorine atom, a methyl group, an ethyl group, a trimethylsiloxy group, a cyano group or a trifluoromethyl group.

3. The non-aqueous electrolyte for a lithium-ion battery according to claim 1, wherein the compound represented by Structural Formula 1 is specifically selected from the following compounds 1 to 9,

4. The non-aqueous electrolyte for a lithium-ion battery according to claim 1, wherein the non-aqueous electrolyte for a lithium-ion battery further comprises one or more of vinylene carbonate (VC), vinylethylene carbonate (VEC), and fluoroethylene carbonate (FEC).

5. The non-aqueous electrolyte for a lithium-ion battery according to claim 1, further comprising a lithium salt and a non-aqueous organic solvent, wherein the lithium salt is selected from one or more of LiPF₆, LiBOB, LiDFOB, LiBF₄, LiSbF₆, LiAsF₆, LiN(SO₂CF₃)₂, LiN(SO₂C₂F₅)₂, LiC(SO₂CF₃)₃ or LiN(SO₂F)₂;

the non-aqueous organic solvent is a mixture of a cyclic carbonate and a linear carbonate, the cyclic carbonate being selected from one or more of ethylene carbonate, propylene carbonate or butylene carbonate, and the linear carbonate being selected from one or more of dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate or methyl propyl carbonate.

6. A lithium-ion battery, comprising a cathode, an anode, and a separator disposed between the cathode and the anode, and further comprising the non-aqueous electrolyte for a lithium-ion battery according to claim 1.

7. The lithium-ion battery according to claim 6, wherein the active material for the cathode is selected from one or more of LiCoO₂, LiNiO₂, LiMn₂O₄, LiCo_1-yM_yO₂, LiNi_1-yM_yO_2, LiMn_2-yM_yO₄, or LiNi_xCo_yMn_zM_1-x-y-zO₂, wherein M is selected from one or more of Fe, Co, Ni, Mn, Mg, Cu, Zn, Al, Sn, B, Ga, Cr, Sr, V or Ti, and 0≤

y≤

1, 0≤

x≤

1, 0≤

z≤

1, and x+y+z≤

1.

8. The lithium-ion battery according to claim 6, wherein the active material for the cathode is selected from LiFe_1-xM_xPO₄, wherein M is selected from one or more of Mn, Mg, Co, Ni, Cu, Zn, Al, Sn, B, Ga, Cr, Sr, V or Ti, and 0≤

x<

1.

9. The non-aqueous electrolyte for a lithium-ion battery according to claim 1, wherein the non-aqueous electrolyte for a lithium-ion battery further comprises one or more of 1,3-propane sultone (1,3-PS), 1,4-butane sultone (BS), and 1,3-propene sultone (PST).