Source: http://www.google.com/patents/US7592100?dq=6,418,462
Timestamp: 2014-12-28 13:59:02
Document Index: 693627991

Matched Legal Cases: ['Application No. 2002', 'Application No. 2003', 'Application No. 2002', 'Application No. 2003', 'Application No. 10', 'application No. 2006', 'Application No. 2000', 'application No. 2002']

Patent US7592100 - Crystalline particles of a lithium-containing oxide of two kinds of ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe present invention provides a high-capacity and low-cost non-aqueous electrolyte secondary battery, comprising: a negative electrode containing, as a negative electrode active material, a ssubstance capable of absorbing/desorbing lithium ions and/or metal lithium; a separator; a positive electrode;...http://www.google.com/patents/US7592100?utm_source=gb-gplus-sharePatent US7592100 - Crystalline particles of a lithium-containing oxide of two kinds of transition metal elements and having a layered crystal sstructure and oxygen atoms forming a cubic closest packing structure; high energy density; compact; lightweightAdvanced Patent SearchPublication numberUS7592100 B2Publication typeGrantApplication numberUS 10/333,269PCT numberPCT/JP2001/009756Publication dateSep 22, 2009Filing dateNov 7, 2001Priority dateMar 22, 2001Fee statusPaidAlso published asCN1287474C, CN1430795A, EP1296391A1, EP1296391A4, US7682747, US7718318, US20030170540, US20080096111, US20080193844, WO2002078105A1Publication number10333269, 333269, PCT/2001/9756, PCT/JP/1/009756, PCT/JP/1/09756, PCT/JP/2001/009756, PCT/JP/2001/09756, PCT/JP1/009756, PCT/JP1/09756, PCT/JP1009756, PCT/JP109756, PCT/JP2001/009756, PCT/JP2001/09756, PCT/JP2001009756, PCT/JP200109756, US 7592100 B2, US 7592100B2, US-B2-7592100, US7592100 B2, US7592100B2InventorsTsutomu Ohzuku, Hiroshi Yoshizawa, Masatoshi NagayamaOriginal AssigneePanasonic Corporation, Osaka City UniversityExport CitationBiBTeX, EndNote, RefManPatent Citations (98), Non-Patent Citations (51), Classifications (30), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetCrystalline particles of a lithium-containing oxide of two kinds of transition metal elements and having a layered crystal sstructure and oxygen atoms forming a cubic closest packing structure; high energy density; compact; lightweightUS 7592100 B2Abstract The present invention provides a high-capacity and low-cost non-aqueous electrolyte secondary battery, comprising: a negative electrode containing, as a negative electrode active material, a ssubstance capable of absorbing/desorbing lithium ions and/or metal lithium; a separator; a positive electrode; and an electrolyte, wherein the positive electrode active material contained in the positive electrode is composed of crystalline particles of an oxide containing two kinds of transition metal elements, the crystalline particles having a layered crystal structure, and oxygen atoms constituting the oxide forming a cubic closest packing structure.
Li[Lix(AyB1−y)1−x]O2 wherein A and B are different transition metal elements, 0≦x≦0.3 and 0<y<1). That is, the lithium-containing oxide expressed by formula (1) contains two kinds of transition metal elements.
Li[Lix(Ni1/2Mn1/2)1−x]O2 wherein 0≦x≦0.3.
Li[Lix(AyByCy)1-x]O2 wherein A and B are different transition metal elements, C is at least one kind of an added element different from A and B, 0≦x≦0.3 and 0<2y+p≦1.
BEST MODE FOR CARRYING OUT THE INVENTION As described above, a positive electrode active material composed of a nickel-manganese composite oxide exhibiting a new function is conventionally obtained by forming a solid solution by dispersing a nickel compound and a manganese compound uniformly in the atomic level. Based on this prior art, the present inventors have found that a further new function can be obtained by mixing two kinds of any transition metals if a specific structure is further provided. In particular, the inventors have found that it is important from the viewpoint of the composition that the two kinds of transition metals should be roughly equal in quantity to each other, and also important from the viewpoint of the crystal structure that a layered structure should be established and oxygen atoms should form a cubic closest packing structure.
Li[Lix(Ni1/2Mn1/2)1−x]O2 wherein 0≦x≦0.3. If the atomic ratio of lithium in the lithium-containing oxide is further increased, the electric capacity as the active material decreases and also synthesis of the target layered-structure active material tends to fail. Therefore, it is preferable to satisfy 0≦x≦0.3, and particularly preferable to satisfy 0.03≦x≦0.25. The atmosphere for sintering may be an oxidation atmosphere. In this examination, the ordinary atmosphere was used.
The same results were obtained for the active material expressed by Li[Li0.1(Ni1/2Mn1/2)0.9]O2 and the active material expressed by Li[Li0.3(Ni1/2Mn1/2)0.7]O2. Therefore, from the results for Li[Lix(Ni1/2Mn1/2)1−x]O2 (X=0.1�0.3) containing lithium excessively as described above, there is found a merit that the thermal stability of the active material at an overcharge can be improved by the mechanism described above. No prior art discloses or suggests this idea, and thus the present invention presents a guideline for entirely novel material design.
As the inorganic solid electrolyte, nitrides of Li, halides of Li, and oxysalt of Li are well known. Among them, Li4SiO4, Li4SiO4-LiI�LiOH, xLi3PO4-(1−x)Li4SiO4, Li2SiS3, Li3PO4-Li2S�SiS2 and phosphorus sulfide compounds are effectively used.
EXAMPLES 4 AND 5 AND COMPARATIVE EXAMPLES 2 TO 9 Peak of Precursor A mixed solution of 1.2 mol/liter of an aqueous nickel sulfate solution, 1.2 mol/liter of an aqueous manganese sulfate solution, and 1.2 mol/liter of an aqueous cobalt sulfate solution, as well as 4.8 mol/liter of an aqueous NaOH solution and 4.8 mol/liter of a NH3 solution, were fed into the reaction bath 6 of the apparatus shown in FIG. 4 at a rate of 0.5 milliliter/minute, to obtain a nickel-manganese-cobalt composite hydroxide as a precursor �a� of the present invention. Dissolved oxygen in the reaction bath was purged by bubbling argon gas. Also, hydrazine was added under adjustment to prevent a magnetic substance such as excessively reduced CoO from being included in the precursor as the reactant. The X-ray diffraction pattern of the precursor �a� is shown in (a) of FIG. 6.
A nickel-manganese oxide (nickel:manganese=1:1) as a precursor �b� of the present invention was also obtained in the same manner as that described above except that cobalt sulfate was not used. The X-ray diffraction pattern of the precursor �b� is shown in (b) of FIG. 6.
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Soc., Apr. 1998, vol. 145, No. 4, pp. 1113-1120.47Tabuchi M et al., "Electrochemical and magnetic properties of lithium manganese oxide spinels prepared by oxidation at low temperature of hydrothermally obtained LiMn02", vol. 89, No. 1-2, Aug. 1, 1996, pp. 53-63, XP004070124.48Terada, Y. et al., "In Situ XAFS Analysis of Li(Mn, M)2 O4(M=Cr, Co, Ni) 5V Cathode Materials for Lithium-Ion Secondary Batteries," Journal of Solid Sate Chemistry, Feb. 2001, p. 286-291, vol. 156 Issue 2, Academic Press.49West et al., "Introduction for Solid-State Chemistry," Kodansha-Scientific, Mar. 20, 1996, with partial translation.50Yoshio et al., "Lithium-ion Secondary Battery," Nikkan Kogyo Shinbunsha, Mar. 29, 1996, with partial translation.51Yoshio, M. et al., "Preparation and properties of LiCoyMnzNi1-x-yO2 as a chathode for lithium ion batteries," Journal of Power Sources, Aug. 17, 1998, p. 176-181, vol. 90, Elsevier.Classifications U.S. Classification429/231.1, 429/221, 429/224, 429/218.1, 429/223, 429/231.3International ClassificationH01M4/505, H01M4/525, H01M10/05, H01M2/34, H01M10/42, H01M4/36Cooperative ClassificationH01M4/0471, H01M10/0525, H01M2004/028, H01M10/052, H01M4/525, Y02E60/122, H01M4/362, H01M2/34, H01M2010/4292, H01M2004/021, H01M10/42, H01M4/505, H01M4/13, H01M4/485European ClassificationH01M4/13, H01M4/36K, H01M4/525, H01M4/505Legal EventsDateCodeEventDescriptionApr 2, 2013CCCertificate of correctionFeb 20, 2013FPAYFee paymentYear of fee payment: 4Nov 20, 2008ASAssignmentOwner name: PANASONIC CORPORATION, JAPANFree format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;REEL/FRAME:021897/0558Effective date: 20081001May 4, 2006ASAssignmentOwner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OSAKA CITY;REEL/FRAME:017861/0154Effective date: 20060401Owner name: OSAKA CITY UNIVERSITY, JAPANFeb 18, 2004ASAssignmentOwner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPANOwner name: OSAKA CITY, JAPANFree format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE ADDRESS, PREVIOUSLY RECORDED AT REEL 014040, FRAME 0542;ASSIGNORS:OHZUKU, TSUTOMU;YOSHIZAWA, HIROSHI;NAGAYAMA, MASATOSHI;REEL/FRAME:014992/0129Effective date: 20021101Jan 17, 2003ASAssignmentOwner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPANOwner name: OSAKA CITY, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OHZUKU, TSUTOMU;YOSHIZAWA, HIROSHI;NAGAYAMA, MASATOSHI;REEL/FRAME:014040/0542Effective date: 20021101RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google