A negative electrode for use in secondary battery with nonaqueous electrolyte
having
a high voltage and energy density and a superior cycle property, characterized
in that the active material comprises composite carbon materials containing massive
ball-shaped graphite particles, carbon fibers, and graphite flakes. The massive
ball-shaped graphite particles provide porosity to the composite, the carbon fibers
improve packing density, conductivity, and stiffness to prevent the body made thereof
from swelling and decomposing, and the graphite flakes reduce friction in the mixture.
An aqueous, non-fluorine-containing binder is used, along with a titanium negative substrate.