Additive for Electrochemical Elements, Electrolyte Solution for Electrochemical Elements, Electrochemical Element, Electrolyte Solution for Lithium Ion Secondary Batteries, Lithium Ion Secondary Battery and Method for Producing Additive for Electrochemical Elements

Patent metadata

Field	Value
Publication number	US-2019190071-A1
Application number	US-201716323114-A
Country	US
Kind code	A1
Filing date	Jul 19, 2017
Priority date	Sep 5, 2016
Publication date	Jun 20, 2019
Grant date	—

Abstract

The purpose of the present invention is to provide: an additive for electrochemical elements, which is capable of improving the service life characteristics of a battery, while having high physical stability; an electrolyte solution for electrochemical elements, which uses this additive for electrochemical elements; an electrochemical element; an electrolyte solution for lithium ion secondary batteries; a lithium ion secondary battery; and a method for producing an additive for electrochemical elements. An additive for electrochemical elements according to the present invention is characterized by being represented by general formula [(BO) 3 (OR) 3 ]m(H 2 O)n (wherein each of m and n represents an integer of 1 or more; and each R independently represents an organic group having 1 or more carbon atoms). A method for producing an additive for electrochemical elements according to the present invention is characterized by a synthesis by means of dehydration condensation of boric acid and an alcohol.

First claim

1 . An additive for electrochemical elements represented by the general formula: [(BO) 3 (OR) 3 ] m (H 2 O) n ,
wherein each of m and n represents an integer of 1 or more, and each R independently represents an organic group having 1 or more carbon atoms.

2 . The additive for electrochemical elements according to claim 1 ,
wherein each R independently represents an organic group having 2 to 6 carbon atoms.

3 . The additive for electrochemical elements according to claim 1 ,
wherein R is any one of —CH(CH 3 ) 2 , —CH 3 , —CH 2 CH 3 , and —C 6 H 11 .

4 . The additive for electrochemical elements according to claim 1 ,
wherein m and n satisfy a relationship of n≤m.

5 . An electrolyte solution for electrochemical elements comprising the additive for electrochemical elements according to claim 1 .

6 . An electrochemical element comprising the additive for electrochemical elements according to claim 1 .

7 . An electrochemical element comprising a non-aqueous electrolyte solution,
wherein the non-aqueous electrolyte solution contains the additive for electrochemical elements according to claim 1 and a non-aqueous solvent.

8 . An electrolyte solution for lithium ion secondary batteries comprising the additive for electrochemical elements according to claim 1 , a non-aqueous solvent, and LiPF 6 .

9 . The electrolyte solution for lithium ion secondary batteries according to claim 8 , further comprising vinylene carbonate.

10 . The electrolyte solution for lithium ion secondary batteries according to claim 9 ,
wherein a content of the vinylene carbonate is 2% by weight or less based on the total weight of the non-aqueous solvent and LiPF 6 .

11 . A lithium ion secondary battery comprising:
a positive electrode; a negative electrode; and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution is the electrolyte solution for lithium ion secondary batteries according to claim 8 .

12 . A method for producing an additive for electrochemical elements represented by the general formula: [(BO) 3 (OR) 3 ] m (H 2 O) n ,
wherein each of m and n represents an integer of 1 or more, m and n satisfy a relationship of n≤m, and each R independently represents a hydrocarbon group having 1 or more carbon atoms, wherein the additive for electrochemical elements is synthesized by means of dehydration condensation of boric acid and an alcohol.

13 . The method for producing an additive for electrochemical elements according to claim 12 , wherein the alcohol is any one of methanol, ethanol, isopropanol, and cyclohexanol.

Assignees

• Hitachi High Tech Corp

Inventors

• Haruna Hiroshi
• Takahashi Shin

Classifications

• H01M10/0525

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

• H01M2300/0025

  Organic electrolyte · CPC title

• C07F5/05 Primary

  Cyclic compounds having at least one ring containing boron but no carbon in the ring · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title