To provide a positive electrode plate capable of securing capacity of a battery while lessening diffusion resistance of a lithium-ion when being used for a lithium-ion secondary battery, the lithium-ion secondary battery which uses the same positive electrode plate and reduces internal resistance of the battery and secures its capacity and can restrain increase of the internal resistance, to provide a vehicle loading the same battery, and to provide a battery loading device for loading the same battery.
The positive electrode plate 20 has a metal foil 21 with a primary principal plane 21a and a secondary principal plane 21b, and a laminated active layer 22 which are formed on at least either of the principal planes and laminates a plurality of positive electrode active material layers 22a, 22b including positive active material particles 25L, 25S. In the laminated active material layer, the positive electrode active material layer with more uniform content of positive electrode active material particles and a more small average grain size of the positive electrode active material particles viewed from the laminated direction DT1, is disposed on a more upper layer.
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KOHAMA KEIICHI
KAWAI HIDEYASU
YAMAMURA HIDEYUKI
IWASE KAYO
SASAKI ITSUKI
