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AssigneeHitachi Maxell, Ltd.
InventorsHiromu Sugiyama, Hideyuki Morimoto, Atsushi Ueda, Shigeo Aoyama
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An electrode according to the invention can provide a non-aqueous electrolyte secondary battery having an ability to release a volume expansion at the time of charge and discharge as well as the time of a cycle. The electrode comprises a current collector made of a material which is not alloyed with Li, and a dot pattern 2 of a metallic material able to be alloyed with Li formed on the current collector. At the time of charge, since the volume expansion of each dot 3 is carried out so as to bury adjoining crevices 4 between the dots, a stress generated is released, thereby degradation of an electrode being avoided. Each dot may also be made into porosity.
An electrode used for a non-aqueous electrolyte secondary battery, which comprises a current collector of a metallic material not to be alloyed with Li and a pattern of dots formed on the current collector, which is an active material of a metallic material able to be alloyed with Li,
A non-aqueous electrolyte secondary battery which comprises positive and negative electrodes, the negative electrode comprising a current collector of a metallic material not to be alloyed with Li and a pattern of dots formed on the current collector, which is an active material of a metallic material able to be alloyed with Li,
Dependencies are inferred from the claim text.