US Patent 7544441 Secondary battery having an active material radical compound

Patent 7544441 was granted and assigned to NEC Corporation on June, 2009 by the United States Patent and Trademark Office.

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Patent Inventor Names

Jiro Iriyama0

Kentaro Nakahara0

Masaharu Satoh0

Shigeyuki Iwasa0

Yukiko Morioka0

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Patent abstract

A secondary battery is provided which has a high energy density, a high capacity, an excellent stability in charge-discharge cycle as well as an excellent safety. The secondary battery comprises at least a positive electrode, a negative electrode and an electrolyte, wherein an active material of at least one of the positive and negative electrodes includes at least one compound selected from the group consisting of radical compounds represented by the formula (1) or the formula (3):

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=075444410

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