Global Patent Index - EP 2238638 A4

EP 2238638 A4 20130410 - A METHOD OF PREPARING A LITHIUM IRON PHOSPHATE CATHODE MATERIAL FOR LITHIUM SECONDARY BATTERIES

Title (en)

A METHOD OF PREPARING A LITHIUM IRON PHOSPHATE CATHODE MATERIAL FOR LITHIUM SECONDARY BATTERIES

Title (de)

VERFAHREN ZUM HERSTELLEN EINES LITHIUMEISENPHOSPHAT-KATHODENMATERIALS FÜR LITHIUM-SEKUNDÄRBATTERIEN

Title (fr)

PROCÉDÉ D'ÉLABORATION D'UN MATÉRIAU CATHODIQUE À BASE DE LITHIUM, DE FER ET DE PHOSPHATE POUR DES BATTERIES SECONDAIRES AU LITHIUM

Publication

EP 2238638 A4 20130410 (EN)

Application

EP 08715347 A 20080328

Priority

CN 2008070611 W 20080328

Abstract (en)

[origin: WO2009117871A1] Described is a method of preparing a cathode material for lithium secondary batteries, the method comprising the following steps: sintering a first mixture containing a lithium compound, an iron compound, a phosphorous compound and a carbon additive at a first temperature, to obtain a first sintering product; mixing the first sintering product and a carbon additive, to obtain a second mixture; and sintering the second mixture at a second temperature, to obtain the cathode material. The cathode material so produced exhibits superior electrical properties.

IPC 8 full level

H01M 4/58 (2010.01); C01B 25/45 (2006.01); H01M 4/136 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 4/1397 (2010.01); H01M 10/0525 (2010.01); H01M 10/36 (2010.01)

CPC (source: EP)

C01B 25/45 (2013.01); H01M 4/136 (2013.01); H01M 4/366 (2013.01); H01M 4/5825 (2013.01); H01M 4/625 (2013.01); H01M 4/1397 (2013.01); H01M 10/0525 (2013.01); Y02E 60/10 (2013.01)

Citation (search report)

  • [XI] CHEN AND J R DAHN Z: "Reducing Carbon in LiFeP04/C Composite Electrodes to Maximize Specific Energy, Volumetric Energy, and Tap Density", JOURNAL OF THE ELECTROCHEMICAL SOCIETY, ECS, vol. 149, no. 9, 29 July 2002 (2002-07-29), pages 1184 - 1189, XP008138292, ISSN: 0013-4651
  • [A] DOEFF M M ET AL: "Optimization of carbon coatings on LiFePO4", JOURNAL OF POWER SOURCES, ELSEVIER SA, CH, vol. 163, no. 1, 7 December 2006 (2006-12-07), pages 180 - 184, XP027938446, ISSN: 0378-7753, [retrieved on 20061207]
  • [A] LIU H P ET AL: "Synthesis and electrochemical properties of olivine LiFePO4 prepared by a carbothermal reduction method", JOURNAL OF POWER SOURCES, ELSEVIER SA, CH, vol. 184, no. 2, 8 March 2008 (2008-03-08), pages 469 - 472, XP024525240, ISSN: 0378-7753, [retrieved on 20080308], DOI: 10.1016/J.JPOWSOUR.2008.02.084
  • [T] LAI C ET AL: "Improved electrochemical performance of LiFePO4/C for lithium-ion batteries with two kinds of carbon sources", SOLID STATE IONICS, NORTH HOLLAND PUB. COMPANY. AMSTERDAM; NL, NL, vol. 179, no. 27-32, 30 September 2008 (2008-09-30), pages 1736 - 1739, XP023521373, ISSN: 0167-2738, [retrieved on 20080522], DOI: 10.1016/J.SSI.2008.03.042
  • See references of WO 2009117871A1

Citation (examination)

  • CN 1457111 A 20031119 - HUANG HUIYANG [CN]
  • CHUNSHENG WANG ET AL: "Ionic/Electronic Conducting Characteristics of LiFePO[sub 4] Cathode Materials", ELECTROCHEMICAL AND SOLID-STATE LETTERS, vol. 10, no. 3, 1 January 2007 (2007-01-01), pages A65, XP055172733, ISSN: 1099-0062, DOI: 10.1149/1.2409768
  • NAKAMURA T ET AL: "Electrochemical study on Mn<2+>-substitution in LiFePO4 olivine compound", JOURNAL OF POWER SOURCES, ELSEVIER SA, CH, vol. 174, no. 2, 6 December 2007 (2007-12-06), pages 435 - 441, XP025917578, ISSN: 0378-7753, [retrieved on 20071206], DOI: 10.1016/J.JPOWSOUR.2007.06.191
  • JAYAPRAKASH ET AL: "On the electrochemical behavior of LiMXFe1-XPO4 [M=Cu, Sn; X=0.02] anodes - An approach to enhance the anode performance of LiFePO4 material", ELECTROCHEMISTRY COMMUNICATIONS, ELSEVIER, AMSTERDAM, NL, vol. 9, no. 4, 1 April 2007 (2007-04-01), pages 620 - 628, XP022015804, ISSN: 1388-2481, DOI: 10.1016/J.ELECOM.2006.10.040
  • CHUNG-YAN LAI ET AL: "Effect of Co doping on structure and electrochemical performance of LiFePO4", DIANCHI - BATTERY MONTHLY, vol. 37, no. 5, 1 October 2007 (2007-10-01), CN, pages 342 - 344, XP055050317, ISSN: 1001-1579
  • YING J ET AL: "Preparation and characterization of high-density spherical Li0.97Cr0.01FePO4/C cathode material for lithium ion batteries", JOURNAL OF POWER SOURCES, ELSEVIER SA, CH, vol. 158, no. 1, 14 July 2006 (2006-07-14), pages 543 - 549, XP027938981, ISSN: 0378-7753, [retrieved on 20060714]
  • LIU H ET AL: "Effects of heteroatoms on doped LiFePO4/C composites", JOURNAL OF SOLID STATE ELECTROCHEMISTRY ; CURRENT RESEARCH AND DEVELOPMENT IN SCIENCE AND TECHNOLOGY, SPRINGER, BERLIN, DE, vol. 12, no. 7-8, 18 December 2007 (2007-12-18), pages 1017 - 1020, XP019593244, ISSN: 1433-0768
  • ZHANG M ET AL: "The preparation and characterization of olivine LiFePO4/C doped with MoO3 by a solution method", SOLID STATE IONICS, NORTH HOLLAND PUB. COMPANY. AMSTERDAM; NL, NL, vol. 177, no. 37-38, 1 December 2006 (2006-12-01), pages 3309 - 3314, XP027896088, ISSN: 0167-2738, [retrieved on 20061201]

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2009117871 A1 20091001; EP 2238638 A1 20101013; EP 2238638 A4 20130410; JP 2011515813 A 20110519; JP 5291179 B2 20130918; KR 20100139085 A 20101231

DOCDB simple family (application)

CN 2008070611 W 20080328; EP 08715347 A 20080328; JP 2011501084 A 20080328; KR 20107023952 A 20080328