Composite graphite particles for nonaqueous secondary battery, negative-electrode material containing the same, negative electrode, and nonaqueous secondary battery
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United States of America Patent
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Apr 30, 2013
Grant Date -
Apr 8, 2010
app pub date -
Dec 25, 2007
filing date -
Dec 26, 2006
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Abstract
A subject is to provide a nonaqueous secondary battery which is sufficiently low in charge/discharge irreversible capacity in initial cycling even when an active-material layer comprising a negative-electrode material and formed on a current collector is densified for capacity increase where the subject is accomplished with composite graphite particles for a nonaqueous secondary battery which comprise a composite of spherical graphite particles and a binder graphite and which satisfy at least one of (a) to (g) conditions as presently claimed and a negative electrode produced using the carbonaceous negative-electrode material according to the invention is excellent in electrolytic-solution infiltration and provides a nonaqueous secondary battery having excellent charge/discharge high-load characteristics.
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