(19)
(11) EP 3 425 699 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
10.07.2019 Bulletin 2019/28

(43) Date of publication:
09.01.2019 Bulletin 2019/02

(21) Application number: 18181173.8

(22) Date of filing: 02.07.2018
(51) International Patent Classification (IPC): 
H01M 2/16(2006.01)
H01M 4/62(2006.01)
H01M 10/0562(2010.01)
 H01M 4/38(2006.01)
H01M 10/052(2010.01)
H01M 4/02(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 06.07.2017 JP 2017133106

(71) Applicants:
  • TOYOTA JIDOSHA KABUSHIKI KAISHA
    Toyota-shi, Aichi-ken 471-8571 (JP)
  • Shin-Etsu Chemical Co., Ltd.
    Chiyoda-ku, Tokyo 100-0004 (JP)

(72) Inventors:
  • OTAKI, Mitsutoshi
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • OSE, Norihiro
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • HAMA, Shigenori
    Toyota-shi, Aichi-ken, 471-8571 (JP)
  • TANIGUCHI, Kazuyuki
    Annaka-shi, Gunma, 379-0125 (JP)
  • YAMADA, Yoshiyasu
    Annaka-shi, Gunma, 379-0125 (JP)
  • NAKANISHI, Tetsuo
    Annaka-shi, Gunma, 379-0195 (JP)

(74) Representative: Kuhnen & Wacker Patent- und Rechtsanwaltsbüro PartG mbB 
Prinz-Ludwig-Straße 40A
85354 Freising
85354 Freising (DE)

   


(54) ALL-SOLID-STATE LITHIUM ION SECONDARY BATTERY


(57) Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein, for the anode active material particles, a value A obtained by the following formula (1) is 6.1 or more and 54.8 or less:

where SBET is a BET specific surface area (m2/g) of the anode active material particles; dmed is a median diameter D50 (µm) of the anode active material particles; and D is a density (g/cm3) of the anode active material particles.