CARBONACEOUS MATERIAL-COATED GRAPHITE PARTICLES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY

DRIVE November 27, 2024
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Provided is carbonaceous substance-coated graphite particles that exhibit excellent output characteristics when used as a negative electrode material for a lithium ion secondary battery. The carbonaceous substance-coated graphite particles includes: graphite particles; and carbonaceous coatings covering at least part of surfaces of the graphite particles, the carbonaceous substance-coated graphite particles have a maximum particle diameter of 30.0 to 90.0 um, a pore volume Vs of pores with a pore size of 7.8 to 36.0 nm is 0.009 to 0.164 cm3/g, and in a pore size distribution graph with the pore size being plotted on a horizontal axis and a dV/dP value obtained by differentiating the pore volume with the pore size being plotted on a vertical axis, a pore size Pmax with which the dV/dP value is maximized is 2.5 to 5.5 nm.

Discussion in the ATmosphere

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