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POSITIVE ELECTRODE ACTIVE MATERIAL FOR MAGNESIUM SECONDARY CELL, POSITIVE ELECTRODE FOR MAGNESIUM SECONDARY CELL, AND MAGNESIUM SECONDARY CELL meetings

Foreign code F170009134
File No. S2017-0184-N0
Posted date Jul 20, 2017
Country WIPO
International application number 2016JP066795
International publication number WO 2016199732
Date of international filing Jun 6, 2016
Date of international publication Dec 15, 2016
Priority data
  • P2015-117810 (Jun 10, 2015) JP
Title POSITIVE ELECTRODE ACTIVE MATERIAL FOR MAGNESIUM SECONDARY CELL, POSITIVE ELECTRODE FOR MAGNESIUM SECONDARY CELL, AND MAGNESIUM SECONDARY CELL meetings
Abstract The present invention addresses the problem of providing: a positive electrode active material for a magnesium secondary cell with which it is possible to obtain a magnesium secondary cell exhibiting excellent charge/discharge characteristics; and a positive electrode for a magnesium secondary cell and a magnesium secondary cell in which the positive electrode active material is used. The present invention pertains to: a positive electrode active material for a magnesium secondary cell comprising a magnesium composite oxide, which is represented by the composition formula (1): MgxM1yM2zO2 and which has a layered rock-salt type crystal structure of space group Fm-3m; and a positive electrode for a magnesium secondary cell and a magnesium secondary cell in which the positive electrode active material is used. In formula (1): M1 is Ni, Co, or Mn; M2 is at least one element, different from M1, selected from the group consisting of Ni, Co, Mn, Ti, V, Cr, Fe, Cu, Nb, W, Mo, and Ru; 0 < x ≤ 1; 0 < y < 2; 0 < z < 1; and 1.5 ≤ x + y + z ≤ 2.0.
Outline of related art and contending technology BACKGROUND ART
In recent years, the use of the vehicle battery from a mobile device, to a stationary power source such as a diversified and, at a low cost alternative to conventional lithium ion secondary battery having a high energy density in the development of next-generation secondary battery has been expected. In particular the generation of the secondary battery is the magnesium secondary battery, charge and discharge reaction (i) a high capacity can be used for the second electron can be expected, a negative electrode (ii) magnesium can be used in addition to the excellent safety due to the relatively low potential, the high voltage battery becomes possible to operate, (iii) reduce the risk of localized magnesium in a production cost, and a number of advantages such as, research and development is being advanced.
Initially developed, the magnesium secondary battery as a positive electrode active material, TiS2 、ZrS2 、RuO2 、Co3 O4 、V2 O5 or the like is used but, in recent years of various magnesium composite oxide crystal structure has been proposed.
For example, is (Tetsu Ichitsubo, et al., Journal of Materials Chemistry, 21, 11764 (2011) ) Ichitsubo et al., as the positive electrode active material of the magnesium secondary battery, having a rock-salt type structure mg0.67 Ni1.33 O2 is disclosed. In addition, the Yagi et al. (Shunsuke Yagi, et al., Japanese Journal of Applied Physics, 52, 025501 (2013)), a rock-salt type structure MgNiO2 synthesis methods have been disclosed.
Scope of claims (In Japanese)[請求項1]
下記式(1)の組成式で表され、空間群Fm-3mの岩塩型結晶構造を有するマグネシウム複合酸化物からなるマグネシウム二次電池用正極活物質。
MgxM1yM2zO2・・・(1)
(式(1)中、M1は、Ni、Co、又はMnであり、M2は、M1とは異なり、且つ、Ni、Co、Mn、Ti、V、Cr、Fe、Cu、Nb、W、Mo、及びRuからなる群より選ばれる少なくとも1種の元素であり、0<x≦1であり、0<y<2であり、0<z<1であり、1.5≦x+y+z≦2.0である。)
[請求項2]
前記式(1)中のM1が、Niである請求項1に記載のマグネシウム二次電池用正極活物質。
[請求項3]
前記式(1)中のM2が、Ni、Co、Mn、Ti、V、Cr、Fe、及びCuからなる群より選ばれる少なくとも1種の元素である請求項1又は請求項2に記載のマグネシウム二次電池用正極活物質。
[請求項4]
前記式(1)中、0<x≦0.8であり、0.5≦y<2であり、0<z≦0.6であり、1.5≦x+y+z≦2.0である請求項1~請求項3のいずれか1項に記載のマグネシウム二次電池用正極活物質。
[請求項5]
請求項1~請求項4のいずれか1項に記載のマグネシウム二次電池用正極活物質を含むマグネシウム二次電池用正極。
[請求項6]
請求項5に記載のマグネシウム二次電池用正極と、負極と、非水電解液とを有するマグネシウム二次電池。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • TOKYO UNIVERSITY OF SCIENCE FOUNDATION
  • Inventor
  • IDEMOTO, Yasushi
  • KITAMURA, Naoto
  • ISHIDA, Naoya
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 DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS KE KG KN KP KR 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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