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SOLID ELECTROLYTE FOR ALL-SOLID-STATE SODIUM BATTERY, MANUFACTURING METHOD THEREFOR, AND ALL-SOLID-STATE SODIUM BATTERY

Foreign code F200010158
File No. (S2018-0806-N0)
Posted date Jun 3, 2020
Country WIPO
International application number 2019JP028881
International publication number WO 2020022342
Date of international filing Jul 23, 2019
Date of international publication Jan 30, 2020
Priority data
  • P2018-138690 (Jul 24, 2018) JP
Title SOLID ELECTROLYTE FOR ALL-SOLID-STATE SODIUM BATTERY, MANUFACTURING METHOD THEREFOR, AND ALL-SOLID-STATE SODIUM BATTERY
Abstract A solid electrolyte for an all-solid-state sodium battery represented by the formula Na3-xSb1-xαxS4 (in the formula, α is selected from among elements in which Na3-xSb1-x αxS4 exhibits a higher ion conductivity than Na3SbS4, and x is 0<x<1).
Outline of related art and contending technology BACKGROUND ART
In recent years, electric vehicles, hybrid vehicles and the like of the vehicle, the solar cell, such as wind power generation apparatus or the like, to store the power demand of a lithium ion battery is increased. However, the lithium-ion battery, a small amount of deposits, and the output destination in order to use the lithium is unevenly distributed, instead of lithium, sodium-rich amount of resources has been proposed to use. Further, from the viewpoint of securing safety, without the use of liquid electrolyte, solid electrolyte is used in the all-solid sodium battery has been actively studied. Is a solid electrolyte, the all-solid sodium battery discharge capacity from the viewpoint of improving physical properties such as, higher ionic conductivity has been demanded. In particular all-solid-state sodium secondary battery, charge and discharge capacity, from the viewpoint of improving the physical properties of the cycle numbers, the higher the ionic conductivity of solid electrolyte which has been obtained. Non-Patent Document 1, A. Banerjee et al., Angew. Chem. Int. Ed., 55 (2016) 9634.(from this point of view) and H. Wang et al., Angew. Chem. Int. Ed., 55 (2016) 9551.(Non-Patent Document 2) is, Na3SbS4 indicates a high ionic conductivity, in addition, the atmosphere stability have been reported.
Scope of claims (In Japanese)[請求項1]
 下記式:
Na 3-xSb 1-xα xS 4
(式中、αは、Na 3-xSb 1-xα xS 4がNa 3SbS 4よりも大きいイオン伝導度を示す元素から選択され、xは0<x<1である)
で表される全固体ナトリウム電池用の固体電解質。

[請求項2]
 前記αが、6価を示す元素から選択される請求項1に記載の全固体ナトリウム電池用の固体電解質。

[請求項3]
 前記6価の元素が、W、Mo、Cr、Mn、Ru、Re、Os及びIrから選択される請求項2に記載の全固体ナトリウム電池用の固体電解質。

[請求項4]
 前記αが、W及びMoから選択される請求項1に記載の全固体ナトリウム電池用の固体電解質。

[請求項5]
 前記αがWである請求項1に記載の全固体ナトリウム電池用の固体電解質。

[請求項6]
 前記xは、Na 3SbS 4よりも大きいイオン伝導度を示す固体電解質を提供し得る範囲を示す請求項1に記載の全固体ナトリウム電池用の固体電解質。

[請求項7]
 前記xが0.05≦x≦0.2である請求項1に記載の全固体ナトリウム電池用の固体電解質。

[請求項8]
 前記固体電解質が、ガラスセラミック状である請求項1に記載の全固体ナトリウム電池用の固体電解質。

[請求項9]
 前記固体電解質が、少なくとも結晶質部を含み、前記結晶質部が、立方晶から構成される請求項1に記載の全固体ナトリウム電池用の固体電解質。

[請求項10]
 前記固定電解質が、ラマンスペクトルにおいて、αS 4由来のアニオンのピークを示す請求項1に記載の全固体ナトリウム電池用の固体電解質。

[請求項11]
 請求項1の固体電解質の製造方法であって、固体電解質製造用の原料をメカニカルミリング処理により混合し、得られた混合物をプレスする固体電解質の製造方法。

[請求項12]
 前記混合物をプレスした後、200~550℃で0.1時間以上加熱する請求項11に記載の固体電解質の製造方法。

[請求項13]
 正極及び負極と、正極と負極間に位置する固体電解質層とを備え、
 前記固体電解質層が、請求項1に記載の固体電解質を含む層である全固体ナトリウム電池。

[請求項14]
 前記固体ナトリウム電池が、250mAh g -1以上の充放電容量を示す請求項13に記載の全固体ナトリウム電池。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • UNIVERSITY PUBLIC CORPORATION OSAKA
  • Inventor
  • HAYASHI AKITOSHI
  • TATSUMISAGO MASAHIRO
  • SAKUDA ATSUSHI
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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