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AssigneeSumitomo Osaka Cement Co., Ltd.
InventorsTomitaro Hara, Takao Fukunaga, Takayasu Iguchi, Takao Kitagawa, Yoshitaka Yamamoto
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The present invention provides a positive electrode for a non-aqueous electrolyte secondary battery in which the charge/discharge rate of a secondary battery is increased by increasing the discharge/discharge rate of the positive electrode as a result of increasing the rate of incorporation and release of lithium ions in olivine-type phosphorous complex compound particles, a non-aqueous electrolyte secondary battery provided with this positive electrode for a non-aqueous electrolyte secondary battery, and a battery module provided with this non-aqueous electrolyte secondary battery. The positive electrode for a non-aqueous electrolyte secondary battery of the present invention is a positive electrode for a non-aqueous electrolyte secondary battery containing olivine-type lithium complex compound particles having a carbonaceous film formed on the surface thereof as a positive electrode active material, in which the coverage factor of the carbonaceous film relative to the surface area of the olivine-type lithium complex compound particles is preferably 95% or more, and the packed density of the olivine-type lithium complex compound particles in this positive electrode for a non-aqueous electrolyte secondary battery is preferably 0.90 g/cm3 to 1.09 g/cm3.
A positive electrode for a non-aqueous electrolyte secondary battery containing a positive electrode active material layer, wherein the positive electrode active material layer comprises a binder, a conductive material, and olivine-type lithium complex compound particles, wherein:
A non-aqueous electrolyte secondary battery that uses a positive electrode containing a carbon-coated, olivine-type lithium complex compound as a positive electrode active material, wherein the positive electrode has a positive electrode active material layer containing 4 parts by weight to 6 parts by weight of a conductive material and 4 parts by weight to 8 parts by weight of a binder based on 100 parts by weight of the positive electrode active material, and the carbon coverage area ratio of the carbon-coated, olivine-type complex compound particles is 95% or more, and wherein the coverage area is measured after a uniform mixture of the binder, the conductive material and the olivine-type lithium complex compound particles is prepared to form the positive electrode active material layer;
Dependencies are inferred from the claim text.