POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR MAGNESIUM SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND MAGNESIUM SECONDARY BATTERY

WIPO Patent Application WO/2019/058681

A1

The purpose of the present invention is to provide: a positive electrode active substance which can realize a magnesium secondary battery having a high capacity and good rate characteristics; and a method for producing same. The purpose of the present invention is also to provide a magnesium secondary battery having a high capacity and good rate characteristics. This positive electrode active substance for a magnesium secondary battery has a BET specific surface area, as measured using a nitrogen adsorption method, of 50-200 m2/g, and is such that pores having a diameter of 1-10 µm, as measured by mercury intrusion porosimetry, have a volume of 0.35 cm3/g or more and account for 30% or more of the total pore volume. A magnesium composite oxide having a composition represented by formula (1) can be given as an example of this type of positive electrode active substance. Formula (1): MgxM(3-x)O4 (In formula (1), M is at least one type of element selected from among transition metals, and X is a number that falls within the range 0.6 ≤ X ≤ 1.4.)

IMAI HIROAKI (JP)
ISE RYUTA (JP)
ISHII KANJI (JP)
DOI SHUNSUKE (JP)

PCT/JP2018/023831

March 28, 2019

June 22, 2018

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UNIV KEIO (JP)

H01M4/485; H01M4/36; H01M4/505; H01M4/525; H01M10/054; H01M10/0569

WO2012137391A1	2012-10-11
WO2014162532A1	2014-10-09

JP2013069604A	2013-04-18
US20160254541A1	2016-09-01
JP2009155135A	2009-07-16
JP2012023015A	2012-02-02

KOTANI YO ET AL., JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 1 March 2016 (2016-03-01)

SHOBAYASHI Masayuki et al. (JP)

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