Method of producing secondary battery cathode material, and...

Details Method of producing secondary battery cathode material, and... Method of producing secondary battery cathode material, and...

H - Electricity

01

M

H01M 4/02 (2006.01) C01B 31/02 (2006.01) C01D 1/02 (2006.01) H01M 4/04 (2006.01) H01M 4/48 (2006.01) H01M 4/58 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2456056

Disclosed is a process for producing a secondary battery cathode material by calcining raw materials. The process is characterized by calcining the raw materials together with one or more substances, which are selected from the group consisting of hydrogen, water and water vapor, and conductive carbon and/or a substance, which can form conductive carbon by pyrolysis, added thereto. As crystals of the secondary battery cathode material obtained by this process have been controlled fine sizes, the secondary battery cathode material promotes movements of ions of an alkali metal led by lithium between the interiors of grains of the cathode material and an electrolyte to suppress polarization in an electrode reaction, and further, increases an area of contact between the positive material and a conductivity-imparting material to provide improved conductivity so that improvements are assured in voltage efficiency and specific battery capacity.

Cette invention se rapporte à un procédé servant à produire le matériau d'anode d'un accumulateur par cuisson de matériaux bruts, ce procédé se caractérisant en ce que les matériaux bruts sont cuits par adjonction d'un ou d'au moins deux types de matériaux choisis dans un groupe constitué d'hydrogène, de vapeur et d'eau, et d'un carbone conducteur et/ou d'une substance capable de produire un carbone conducteur par thermolyse. Le matériau d'anode d'accumulateur obtenu par ce procédé facilite l'entrée/la sortie des ions de métal alcalin, tels que les ions de lithium, entre l'intérieur des grains du matériau d'anode et un électrolyte en raison de la finesse des grains de cristaux, en vue de limiter la polarisation de réaction des électrodes, et il augmente la surface de contact entre le matériau d'anode et un matériau générateur de conductivité, en vue d'améliorer la conductivité et d'accroître l'efficacité en tension et la capacité effective de l'accumulateur.

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