(19)
(11) EP 3 046 169 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

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

(48) Corrigendum issued on:
14.09.2016 Bulletin 2016/37

(43) Date of publication:
20.07.2016 Bulletin 2016/29

(21) Application number: 14843674.4

(22) Date of filing: 10.09.2014
(51) International Patent Classification (IPC): 
H01M 4/58(2006.01)
H01M 10/0525(2010.01)
H01M 10/058(2010.01)
 H01M 4/36(2006.01)
H01M 10/0562(2010.01)
(86) International application number:
PCT/JP2014/073871
(87) International publication number:
WO 2015/037598 (19.03.2015 Gazette 2015/11)
(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

(30) Priority: 13.09.2013 JP 2013190215

(71) Applicant: National Institute of Advanced Industrial Science and Technology
Tokyo 100-8921 (JP)

(72) Inventors:
  • TAKEUCHI, Tomonari
    Ikeda-shi Osaka 563-8577 (JP)
  • SAKUDA, Atsushi
    Ikeda-shi Osaka 563-8577 (JP)
  • KAGEYAMA, Hiroyuki
    Ikeda-shi Osaka 563-8577 (JP)
  • SAKAEBE, Hikari
    Ikeda-shi Osaka 563-8577 (JP)
  • TATSUMI, Kuniaki
    Ikeda-shi Osaka 563-8577 (JP)

(74) Representative: Patentanwälte Gierlich & Pischitzis Partnerschaft mbB 
Gerbermühlstraße 11
60594 Frankfurt am Main
60594 Frankfurt am Main (DE)

   


(54) LITHIUM SULFIDE-IRON-CARBON COMPOSITE BODY


(57) The main object is to provide a novel material with excellent charge and discharge characteristics, such as a high utilization rate of a positive electrode, a high capacity, and good cycle characteristics, in which the material is a compound containing as the major component lithium sulfide useful as a cathode active material for lithium secondary batteries. The invention provides a lithium sulfide-iron-carbon composite containing lithium, iron, sulfur and carbon as constituent elements, with lithium sulfide (Li2S), as the main phase, having a crystallite size of 50 nm or less as calculated from the half width of the diffraction peak based on the (111) plane of Li2S as determined by X-ray powder diffraction.