Non-aqueous electrolyte solution and non-aqueous electrolyte solution secondary battery using the same

• US 7,144,660 B2
• Filed: 03/27/2003
• Issued: 12/05/2006
• Est. Priority Date: 07/27/2001
• Status: Expired due to Term

• Current Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.), MU Ionic Solutions Corporation
• Original Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Inventors: Shima, Kunihisa, Shizuka, Kenji, Ue, Makoto
• Primary Examiner(s): Crepeau, Jonathan
• Application Number:
  US10/397,320
• Publication Number:
  US 20030180626A1
• Time in Patent Office: 1,349 Days
• Field of Search: 429/324, 429/326, 429/330, 252/62.2
• US Class Current: 429/324
• 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 10/0567 characterised by the additives
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 10/4235 Safety or regulating additives or arrangements in electrodes, separators or electrolyte H01M10/4242 takes precedence
• CPC Class Codes: H01M 10/446 Initial charging measures
• CPC Class Codes: H01M 2004/021 Physical characteristics, e.g. porosity, surface area
• CPC Class Codes: H01M 2300/0037 Mixture of solvents
• 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 4/587 for inserting or intercalating light metals
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A non-aqueous electrolyte solution that contains an organic solvent, and a lithium salt and an electrolyte, that is useful for the preparation of a secondary battery that is equipped with a negative electrode and a positive electrode, each of which is capable of storing and releasing lithium, wherein the non-aqueous electrolyte solution contains partially hydrogenated terphenyl that is a mixture of two or more compounds of which one is diphenylcyclohexane that is present in an amount ranging from 10 to 65 wt % of the partially hydrogenated terphenyl and the partially hydrogenated terphenyl has a solubility of not less than 0.5 wt % in the electrolyte solution at room temperature.

Claims

1. A non-aqueous electrolyte solution containing an organic solvent, and a lithium salt as an electrolyte, that is useful for the preparation of a secondary battery that is equipped with a negative electrode and a positive electrode, each of which is capable of storing and releasing lithium, wherein the non-aqueous electrolyte solution contains partially hydrogenated terphenyl and is a mixture of two or more compounds of which one is diphenyleyclohexane that is present in an amount ranging from 10 to 65 wt % of the partially hydrogenated terphenyl.

2. The non-aqueous electrolyte solution according to claim 1, wherein the content of terphenyl in the partially hydrogenated terphenyl is not more than 6 wt %.

3. The non-aqueous electrolyte solution according to claim 1, wherein one of the compounds of said mixture of two or more compounds is cyclohexylbiphenyl which is present in the partially hydrogenated terphenyl in an amount ranging from 3 to 35 wt %.

4. The non-aqueous electrolyte solution according to claim 1, wherein the terphenyl is m-terphenyl.

7. The non-aqueous electrolyte solution according to claim 1, wherein the partial hydrogenation ratio of the partially hydrogenated terphenyl ranges from 30 to 70%.

8. The non-aqueous electrolyte solution according to claim 1, wherein the content of the partially hydrogenated terphenyl ranges from 0.01 to 10 wt % based on the total weight of the non-aqueous electrolyte solution.

10. The non-aqueous electrolyte solution according to claim 1, wherein the non-aqueous electrolyte solution contains a cyclic carbonic acid ester represented by formula (I) at a content ranging from 0.1 to 10 wt % based on the total weight of the non-aqueous electrolyte solution:

wherein R₁ and R₂ represent independently a hydrogen atom or methyl.

5. A non-aqueous electrolyte solution containing an organic solvent, and a lithium salt as an electrolyte, that is useful for the preparation of a secondary battery that is equipped with a negative electrode and a positive electrode, each of which is capable of storing and releasing lithium, wherein the non-aqueous electrolyte solution contains partially hydrogenated m-terphenyl.

6. The non-aqueous electrolyte solution according to claim 5, wherein the content of m-terphenyl in the partially hydrogenated m-terphenyl is not more than 6 wt %.

9. A non-aqueous electrolytesolution containing an organic solvent, and a lithium salt as an electrolyte, that is useful for the preparation of a secondary battery that is equipped with a negative electrode and a positive electrode, each of which is capable of storing and releasing lithium, wherein the non-aqueous electrolyte solution contains diphenylcyclohexane at a content ranging from 0.01 to 6.5 wt % based on the total weight of the non-aqueous electrolyte solution.