Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2007-05-08
2007-05-08
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C423S448000
Reexamination Certificate
active
10826233
ABSTRACT:
A graphite powder suitable for a negative electrode material of a lithium ion secondary battery which assures a high discharging capacity not lower than 320 mAh/g is to be manufactured at a lower cost. Specifically, a graphite powder containing 0.01 to 5.0 wt % of boron and having a looped closure structure at an end of a graphite c-planar layer on the surface of a powder, with the density of the interstitial planar sections between neighboring closure structures being not less than 100/μm and not more than 1500/μm, and with d002being preferably not larger than 3.3650 Å, is manufactured by (1) heat-treating a carbon material pulverized at an elevated speed before or after carbonization for graphization at temperature exceeding 1500° C. or by (2) heat-treating the carbon material pulverized before or after carbonization at a temperature exceeding 1500° C. forgraphization and subsequently further heat-treating the graphized material at a temperature exceeding a temperature of the oxidating heat treatment and the heat treatment in the inert gas.
REFERENCES:
patent: 6156457 (2000-12-01), Takami et al.
patent: 6235675 (2001-05-01), McIlroy
patent: 6576369 (2003-06-01), Moriguchi et al.
patent: 6764767 (2004-07-01), Moriguchi et al.
patent: 0 762 522 (1997-03-01), None
patent: 07-223809 (1995-08-01), None
patent: 08-031422 (1996-02-01), None
patent: 09-259886 (1997-10-01), None
Computer-generated English translation of JP 08-31422, obtained from the Japanese Patent Office website (doc date Feb. 1996).
Abe Masaru
Kamei Kazuhito
Kaminaka Hideya
Moriguchi Koji
Nagamine Masayuki
Bell Boyd & Lloyd LLP
Kalafut Stephen J.
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