The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2003
Filed:
Oct. 18, 1999
Naohiro Sonobe, Fukushima-ken, JP;
Minoru Ishikawa, Fukushima-ken, JP;
Jiro Masuko, Fukushima-ken, JP;
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A carbonaceous electrode having improved capacities for doping and dedoping of a cell active substance, such as lithium, and suitable for a non-aqueous secondary battery, is constituted by a carbonaceous material obtained by carbonizing an aromatic condensation polymer formed by condensation of an aromatic compound having a phenolic hydroxy group and an aldehyde. The carbonaceous material is characterized by an atomic ratio H/C between hydrogen atoms and carbon atoms of below 0.1, a carbon dioxide adsorption capacity of at least 10 ml/g, and an X-ray scattering intensity ratio I /I of at least 0.25, wherein I and I represent scattering intensities as measured in a wet state and a dry state, respectively, at a parameter s=2·sin &thgr;/&lgr; of 0.5 nm , wherein &thgr; denotes a scattering angle and &lgr; denotes a wavelength of X-rays in X-ray small-angle scattering measurement.