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ELECTROLYTE SOLUTION, SECONDARY BATTERY AND METHOD FOR PRODUCING ELECTROLYTE SOLUTION

Foreign code F180009523
File No. S2017-0279-C0
Posted date Nov 2, 2018
Country WIPO
International application number 2018JP001585
International publication number WO 2018142968
Date of international filing Jan 19, 2018
Date of international publication Aug 9, 2018
Priority data
  • P2017-016222 (Jan 31, 2017) JP
Title ELECTROLYTE SOLUTION, SECONDARY BATTERY AND METHOD FOR PRODUCING ELECTROLYTE SOLUTION
Abstract Provided is an electrolyte solution which is capable of maintaining a high magnesium ion concentration. An electrolyte solution according to one embodiment of the present invention is obtained by mixing a solvent, magnesium metal and an elemental halogen.
Outline of related art and contending technology BACKGROUND ART
Current as a secondary battery has been widely used for the lithium ion secondary battery, magnesium secondary battery using magnesium as a negative electrode is, 'next-generation secondary battery' have garnered attention as.The magnesium secondary battery, the amount of electricity per unit volume often available, is inexpensive and is rich in the metal resources, safety is high in the air in view of, the lithium ion secondary battery is advantageous.
The magnesium secondary battery, when discharge of the magnesium metal is dissolved as magnesium ions, magnesium ions at the time of the charging as a magnesium metal to be deposited.Therefore, the electrolyte for the magnesium secondary battery, a sufficient amount of magnesium ions and held, and the negative electrode (magnesium metal) between the deposition and dissolution reaction efficiently generated on the obtained characteristics.
Such electrolytic solution as an example, Patent Document 1 is, the magnesium salt dissolved in a solvent consisting of a sulfonic acid electrolyte was disclosed.This technique further, as a method of manufacturing the electrolyte of the magnesium salt is dissolved, (1) a low boiling point solvent (for example, alcohol) the steps of dissolving a magnesium salt, (2) (1) a solution obtained by dissolving the sulfonic acid in the step from the solution obtained, (3) (2) a step of removing the low boiling point solvent, and has disclosed a method for manufacturing.
In addition, Patent Document 2 is, magnesium ions, the ion conductive medium comprising a halogen and a non-aqueous solvent has been disclosed.According to this document, the ion conductivity in the medium, the non-aqueous solvent and halogen to form the molecular complex.
Scope of claims (In Japanese)請求の範囲
[請求項1]
 溶媒、金属マグネシウムおよび単体ハロゲンを混合してなる電解液。
[請求項2]
 溶媒、マグネシウムイオンおよびハロゲン化物イオンを含んでいる、請求項1に記載の電解液。
[請求項3]
 上記電解液の全量に対して、マグネシウムイオンを0.5mol/L以上含んでいる、請求項1または2に記載の電解液。
[請求項4]
 軟X線蛍光XAFS法によって分析した際に、配位数が4であるマグネシウム原子の数が、全マグネシウム原子の数の95%以上を占めている、請求項1~3のいずれか1項に記載の電解液。
[請求項5]
 上記溶媒は、有機溶媒またはイオン液体である、請求項1~4のいずれか1項に記載の電解液。
[請求項6]
 上記溶媒は、スルホン系溶媒である、請求項1~5のいずれか1項に記載の電解液。
[請求項7]
 ハロゲン化物イオンとして、臭化物イオンまたはヨウ化物イオンを含んでいる、請求項1~6のいずれか1項に記載の電解液。
[請求項8]
 請求項1~7のいずれか1項に記載の電解液を含んでいる、二次電池。
[請求項9]
 溶媒、金属マグネシウムおよび単体ハロゲンを混合する工程を含む、電解液の製造方法。
[請求項10]
 上記電解液の全量に対して、マグネシウムイオンを0.5mol/L以上含んでいる、請求項9に記載の電解液の製造方法。
[請求項11]
 上記電解液を軟X線蛍光XAFS法によって分析した際に、配位数が4であるマグネシウム原子が、全マグネシウム原子の数の95%以上を占めている、請求項9または10に記載の電解液の製造方法。
[請求項12]
 上記溶媒は、有機溶媒またはイオン液体である、請求項9~11のいずれか1項に記載の電解液の製造方法。
[請求項13]
 上記溶媒は、スルホン系溶媒である、請求項9~12のいずれか1項に記載の電解液の製造方法。
[請求項14]
 上記単体ハロゲンは、臭素分子またはヨウ素分子である、請求項9~13のいずれか1項に記載の電解液の製造方法。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • THE SCHOOL CORPORATION KANSAI UNIVERSITY
  • Inventor
  • SOEDA, Kazunari
  • ISHIKAWA, Masashi
  • YAMAGATA, Masaki
IPC(International Patent Classification)

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