Non-aqueous electrolyte secondary battery

• Main Authors: Hashimoto Tatsuya, Fukumoto Yusuke, Ohara Keisuke, Yokoyama Yuji
• Format: Patent
• Language: English
• Published: 09.05.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The present invention provides a non-aqueous electrolyte secondary battery that comprises a positive electrode sheet comprising a positive electrode active material layer, and a negative electrode sheet comprising a negative electrode active material layer. The positive electrode sheet and the negative electrode sheet are arranged such that the positive electrode active material layer and the negative electrode active material layer face each other. The negative electrode active material layer comprises a face-to-face region NF that faces the positive electrode active material layer and a non-face-to-face region NNF that does not face the positive electrode active material layer. The non-face-to-face region NNF includes a high density part NHD having a density higher than that of the region face-to-face NF.