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ELECTROLYTE SOLUTION FOR POTASSIUM ION BATTERIES, POTASSIUM ION BATTERY, ELECTROLYTE SOLUTION FOR POTASSIUM ION CAPACITORS, AND POTASSIUM ION CAPACITOR

Foreign code F180009518
File No. (S2017-0293-N0)
Posted date Nov 2, 2018
Country WIPO
International application number 2018JP001621
International publication number WO 2018135627
Date of international filing Jan 19, 2018
Date of international publication Jul 26, 2018
Priority data
  • P2017-009526 (Jan 23, 2017) JP
Title ELECTROLYTE SOLUTION FOR POTASSIUM ION BATTERIES, POTASSIUM ION BATTERY, ELECTROLYTE SOLUTION FOR POTASSIUM ION CAPACITORS, AND POTASSIUM ION CAPACITOR
Abstract Provided are: an electrolyte solution for potassium ion batteries or capacitors, which enables the achievement of a potassium ion battery or capacitor having excellent passive state formability; and a potassium ion battery or capacitor, which is provided with this electrolyte solution. An electrolyte solution for potassium ion batteries or capacitors, which contains at least one potassium salt compound selected from the group consisting of potassium bis(trifluoromethanesulfonyl)amide and potassium bis(fluorosulfonyl)amide and at least one solvent selected from the group consisting of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, pentaethylene glycol dimethyl ether, ethylene carbonate and propylene carbonate, and wherein the concentration of the potassium salt compound is from 1.5 mol/kg to 12.0 mol/kg (inclusive).
Outline of related art and contending technology BACKGROUND ART
Current, as a secondary battery of high energy density, and a nonaqueous electrolyte, a lithium-ion positive electrode and the negative electrode charge and discharge is moved between the non-aqueous electrolyte secondary battery and has been widely used.
In such a non-aqueous electrolyte secondary battery, generally lithium nickelate as a positive electrode (LiNiO 2), (LiCoO 2) such as lithium cobalt oxide having a layered structure of the lithium-transition metal composite oxide is used, as the negative electrode carbon material capable of occluding and releasing lithium, a lithium metal, lithium alloy or the like is used (for example, see Japanese Patent Application Laid-open 2003-151549).In addition, as the positive electrode of the nonaqueous electrolyte secondary battery, as described in the publication JP-2015-515081 is known.
A chargeable and dischargeable battery as the secondary battery, high energy density can be achieved at a high voltage lithium-ion secondary battery is mainly used so far is, lithium, and the relatively limited amount of resources, is expensive.In addition, localized resources and South America, Japan and imported from overseas total is dependent on.Therefore, the cost of the battery for stable supply, instead of the lithium ion secondary battery for the sodium ion secondary battery which is presently under development.However, larger than the atomic weight of lithium, a lithium standard electrode potential as high than 0.33V, the cell voltage is also decreased, and high energy density is difficult.Lithium-ion battery used as the electrolytic solution, International Publication No. 2013/146714 is described in Y.Yamada and A.Yamada, "Review-Superconcentrated Electrolytes for Lithium Batteries", Journal of The Electrochemical Society, 162, A2406-A2423 (2015) or which has been known.
In recent years, lithium ions and sodium ions and potassium ions instead of using the non-aqueous electrolyte secondary battery has been started.Potassium ion secondary battery constituting the electrode active material, particularly the positive electrode active material, and potassium ions to become source and is not used, a potassium compound containing potassium as a constituent element are required.At present, a potassium ion secondary battery as a positive electrode active material, for example, a crystal having a layered rock-salt type structure composed of K0.3MnO2 reference (Christoph Vaalma, et al., Journal of The Electrochemical Society, 163 (7), A1295-A1299 (2016) ) or Prussian blue (Ali Eftekhari, Journal of Power Souces, 126, 221-228 (2004) -crystal-based reference) and the like are known.
Scope of claims (In Japanese)請求の範囲
[請求項1]
 カリウムビス(トリフルオロメタンスルホニル)アミド及びカリウムビス(フルオロスルホニル)アミドよりなる群から選ばれた少なくとも1種のカリウム塩化合物と、
 エチレングリコールジメチルエーテル、ジエチレングリコールジメチルエーテル、トリエチレングリコールジメチルエーテル、テトラエチレングリコールジメチルエーテル、ペンタエチレングリコールジメチルエーテル、エチレンカーボネート及びプロピレンカーボネートよりなる群から選ばれた少なくとも1種の溶媒と、
 を含有し、
 前記カリウム塩化合物の濃度が、1.5mol/kg以上12.0mol/kg以下である
 カリウムイオン電池用電解液。
[請求項2]
 前記カリウム塩化合物が、カリウムビス(フルオロスルホニル)アミドを含む請求項1に記載のカリウムイオン電池用電解液。
[請求項3]
 前記溶媒が、エチレングリコールジメチルエーテルを含む請求項1又は請求項2に記載のカリウムイオン電池用電解液。
[請求項4]
 前記カリウム塩化合物の濃度が、6.0mol/kg以上7.5mol/kg以下である請求項1~請求項3のいずれか1項に記載のカリウムイオン電池用電解液。
[請求項5]
 請求項1~請求項4のいずれか1項に記載のカリウムイオン電池用電解液を備えるカリウムイオン電池。
[請求項6]
 カリウムビス(トリフルオロメタンスルホニル)アミド及びカリウムビス(フルオロスルホニル)アミドよりなる群から選ばれた少なくとも1種のカリウム塩化合物と、
 エチレングリコールジメチルエーテル、ジエチレングリコールジメチルエーテル、トリエチレングリコールジメチルエーテル、テトラエチレングリコールジメチルエーテル、ペンタエチレングリコールジメチルエーテル、エチレンカーボネート及びプロピレンカーボネートよりなる群から選ばれた少なくとも1種の溶媒と、
 を含有し、
 前記カリウム塩化合物の濃度が、1.5mol/kg以上12.0mol/kg以下である
 カリウムイオンキャパシタ用電解液。
[請求項7]
 前記カリウム塩化合物が、カリウムビス(フルオロスルホニル)アミドを含む請求項6に記載のカリウムイオンキャパシタ用電解液。
[請求項8]
 前記溶媒が、エチレングリコールジメチルエーテルを含む請求項6又は請求項7に記載のカリウムイオンキャパシタ用電解液。
[請求項9]
 前記カリウム塩化合物の濃度が、6.0mol/kg以上7.5mol/kg以下である請求項6~請求項8のいずれか1項に記載のカリウムイオンキャパシタ用電解液。
[請求項10]
 請求項6~請求項9のいずれか1項に記載のカリウムイオンキャパシタ用電解液を備えるカリウムイオンキャパシタ。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • TOKYO UNIVERSITY OF SCIENCE FOUNDATION
  • Inventor
  • KOMABA, Shinichi
  • KUBOTA, Kei
  • HOSAKA, Tomooki
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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