Non-aqueous electrolyte secondary battery and producing method of electrode

Abstract

The present invention discloses a non-aqueous electrolyte secondary battery and electrode manufacturing method thereof. The non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, an electrolyte, and a porous protective film formed on either one or both surfaces of the positive and negative electrodes. The porous protective film includes a binder, fine particles, and a surfactant. The battery according to the invention has high reliability and can prevent the generation of inner physical short circuit caused by the exposure of electrode surface.

Description

Non-aqueous electrolyte secondary battery and electrode manufacturing method Cross References to Related Applications This application claims priority from Japanese Patent Application No. 2007-221043 filed with the Japan Patent Office on August 28, 2007, the entire contents of which are incorporated herein by reference. technical field The invention relates to a nonaqueous electrolyte secondary battery and an electrode manufacturing method. Background technique In recent years, with the advancement of electronic technology, various electronic devices have been improved in performance and further reduced in size and may be portable. As a result, the demand for batteries with higher energy density for such electronic devices has increased. As secondary batteries for electronic devices, aqueous electrolyte secondary batteries such as nickel-cadmium batteries and lead batteries have been used. These secondary batteries have a low terminal voltage when discharged and are n...

AI Technical Summary

Problems solved by technology

These secondary batteries have low terminal voltage upon discharge and are not suitable for obtaining high energy density

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