SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIAL AND SECONDARY BATTERY USING THE SAME

• Main Authors: UEHARA, MAKIKO, NOGUCHI, TAKEHIRO
• Format: Patent
• Language: English; French; Japanese
• Published: 02.02.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

Disclosed is a lithium ion secondary battery positive electrode active material using low-cost materials which makes it possible to realize high operating voltages and high capacities while suppressing decreases in capacity caused by cycling. The disclosed secondary battery positive electrode active material is a lithium-manganese composite oxide represented by the general formula (I). Lia(MxMn2-x-yYy) (O4-wZw) (I) (in the formula (I), 0.5 ? x ? 1.2, 0 < y ? 0.3, 0 ? a ? 1.2, and 0 < w ? 1. M includes at least Fe, and in addition to Fe, may further include at least one member selected from the group consisting of Ni, Cu and Cr. Y is at least one member selected from the group consisting of Li, Be, B, Na, Mg, Al, K, Ca, Ti and Si. Z is F and/or Cl.) L'invention porte sur un matériau actif d'électrode positive de batterie secondaire lithium-ion qui utilise des matériaux à bas coût et qui permet d'obtenir des tensions de fonctionnement élevées et des capacités élevées tout en supprimant des réductions de capacité dues à une utilisation cyclique. Le matériau actif d'électrode positive de batterie secondaire décrit est un oxyde composite de lithium-manganèse représenté par la formule générale (I). Lia(MxMn2-x-yYy) (O4-wZw) (I)(dans la formule (I), 0,5 = x = 1,2, 0 < y = 0,3, 0 = a = 1,2, et 0 < w = 1. M comprend au moins Fe, et peut comprendre en plus de Fe au moins un élément choisi dans le groupe comprenant Ni, Cu et Cr. Y est au moins un élément choisi dans le groupe comprenant Li, Be, B, Na, Mg, Al, K, Ca, Ti et Si. Z est F et/ou Cl.)