Loading patent…
AssigneeHitachi Chemical Company, Ltd.
InventorsHideyuki Tsuchiya, Takashi Sakamoto, Takeshi Masayoshi
Estimating the term…
A negative electrode material for a lithium-ion secondary battery, in which the negative electrode material includes a composite particle including a spherical graphite particle and plural graphite particles that have a compressed shape and that aggregate or are combined so as to have nonparallel orientation planes, and the negative electrode material has an R-value in a Raman measurement of from 0.03 to 0.10, and has a pore volume as obtained by mercury porosimetry of from 0.2 mL/g to 1.0 mL/g in a pore diameter range of from 0.1 μm to 8 μm.
A negative electrode material for a lithium-ion secondary battery, the negative electrode material comprising a composite particle including a spherical graphite particle and a plurality of graphite particles that have a compressed shape and an aspect ratio ranging from 1.2 to 5 and that aggregate or are combined so as to have nonparallel orientation planes, and the negative electrode material having an R-value in a Raman measurement of from 0.03 to 0.10, and having a pore volume as obtained by mercury porosimetry of from 0.2 mL/g to 1.0 mL/g in a pore diameter range of from 0.1 μm to 8 μm.
Dependencies are inferred from the claim text.