Method for producing lithium difluorophosphate and nonaqueous electrolyte battery using the same
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0518012
(2008-02-19)
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등록번호 |
US-8728657
(2014-05-20)
|
우선권정보 |
JP-2007-062087 (2007-03-12) |
국제출원번호 |
PCT/JP2008/052688
(2008-02-19)
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§371/§102 date |
20090605
(20090605)
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국제공개번호 |
WO2008/111367
(2008-09-18)
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발명자
/ 주소 |
- Tsujioka, Shoichi
- Fujiwara, Aiichiro
- Mitsui, Toshinori
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출원인 / 주소 |
- Central Glass Company, Limited
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
1 |
초록
▼
An object of the present invention is to provide: a production method for commercially advantageously producing lithium difluorophosphate or an electrolyte solution containing the lithium difluorophosphate, the lithium difluorophosphate serving as an additive useful for improving performance of a no
An object of the present invention is to provide: a production method for commercially advantageously producing lithium difluorophosphate or an electrolyte solution containing the lithium difluorophosphate, the lithium difluorophosphate serving as an additive useful for improving performance of a nonaqueous electrolyte battery; and a nonaqueous electrolyte battery employing the electrolyte solution for the nonaqueous electrolyte battery which solution contains the lithium difluorophosphate produced by the production method. To provide an electrolyte solution for a nonaqueous electrolyte battery which solution contains lithium difluorophosphate, in such a manner as to produce lithium difluorophosphate in the electrolyte solution by reacting a halide other than a fluoride, LiPF6 and water in a nonaqueous solvent, the lithium difluorophosphate serving as an additive useful for improving performance of the nonaqueous electrolyte battery.
대표청구항
▼
1. A method for producing lithium difluorophosphate, comprising the step of: simultaneously reacting all of a halide other than a fluoride, LiPF6 and water with each other in a nonaqueous solvent,wherein a mole ratio of water to LiPF6 is within a range of from 0.002:1 to 1:1, thereby producing lithi
1. A method for producing lithium difluorophosphate, comprising the step of: simultaneously reacting all of a halide other than a fluoride, LiPF6 and water with each other in a nonaqueous solvent,wherein a mole ratio of water to LiPF6 is within a range of from 0.002:1 to 1:1, thereby producing lithium difluorophosphate containing LiPF6, andwherein the halide is 1/n or more times by mole an acid generated by a reaction between LiPF6 and water, provided that n is the number of halogen atoms per molecule of the halide. 2. A method for producing lithium difluorophosphate, as claimed in claim 1, wherein the nonaqueous solvent is at least one solvent selected from the group consisting of cyclic carbonates, chain carbonates, cyclic esters and chain esters. 3. A method for producing lithium difluorophosphate, as claimed in claim 1, wherein the halide is at least one selected from the group consisting of lithium chloride, lithium bromide, silicon tetrachloride, phosphorus trichloride, acetyl chloride, acetyl bromide, propionyl chloride and oxalyl chloride. 4. A method for producing an electrolyte solution for a nonaqueous electrolyte battery, comprising the steps of: (a) simultaneously reacting all of a halide other than a fluoride, LiPF6 and water with each other in a nonaqueous solvent,wherein a mole ratio of water to LiPF6 is within a range of from 0.002:1 to 1:1, andand wherein the halide is 1/n or more times by mole an acid generated by a reaction between LiPF6 and water, provided that n is the number of halogen atoms per molecule of the halide, thereby producing a solution containing lithium difluorophosphate and LiPF6; and(b) purifying and adjusting the lithium difluorophosphate so that a concentration of the lithium difluorophosphate in the solution is within a range of from 0.01 to 5.0 wt %. 5. A method for producing lithium difluorophosphate, as claimed in claim 1, wherein the reaction is conducted by adding a total amount of the halide at once to the LiPF6 and the water. 6. A method for producing an electrolyte solution for a nonaqueous electrolyte battery, as claimed in claim 4, wherein the reaction of the step (a) is conducted by adding a total amount of the halide at once to the LiPF6 and the water.
이 특허에 인용된 특허 (1)
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Tsujioka Shouichi,JPX ; Takahata Mituo,JPX ; Itou Hisakazu,JPX ; Kawashima Tadayuki,JPX ; Sato Keiji,JPX ; Sasaki Hiromi,JPX ; Yamamoto Sunao,JPX, Electrolytic solution for lithium cell and method for producing same.
이 특허를 인용한 특허 (2)
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Abe, Takuro; Takizawa, Hiroki; Ota, Teppei, Method for producing difluorophospate.
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Lee, In-Hyun; Yoon, Su-Jin; Kim, Tae-Ahn; Oh, Seung-Ju, Rechargeable lithium battery.
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