Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Reexamination Certificate
2008-02-06
2011-10-18
McCracken, Daniel C. (Department: 1736)
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
C423S44500R, C252S502000, C361S305000
Reexamination Certificate
active
08038977
ABSTRACT:
Carbon powder having low temperature calcined carbon derived from pitch adhered to a portion of the surface of natural graphite powder is obtained by solids mixing of natural graphite powder and pitch powder as a carbon precursor followed by heat treatment at 900-1500° C. to carbonize the pitch. The amount of pitch powder is such that the ratio V2/V1of the pore volume V2of pores having a diameter of 50-200 nm to the pore volume V1of pores having a diameter of 2-50 nm in a pore size distribution curve obtained by analysis of the nitrogen desorption isotherm of the resulting carbon powder by the BJH method is at least 1. This carbon powder can be used as a negative electrode material for a nonaqueous secondary battery able to operate at low temperatures.
REFERENCES:
patent: 5607770 (1997-03-01), Lewis et al.
patent: 04-368778 (1992-12-01), None
patent: 8-50897 (1996-02-01), None
patent: 09-213328 (1997-08-01), None
patent: 2000-58052 (2000-02-01), None
patent: 2003-100292 (2003-04-01), None
patent: 2003-272625 (2003-09-01), None
Fujiwara Tooru
Yamamoto Hiroshi
Chuo Denki Kogyo Co., Ltd.
Clark & Brody
McCracken Daniel C.
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