ELECTRODE MATERIAL, ELECTRODE, AND LITHIUM ION BATTERY

摘要

An electrode material including electrode active material particles having a carbonaceous film formed on the surfaces thereof in which the coatability of the carbonaceous film can be guaranteed even when a crushing process is carried out, and the rate characteristics and the like are not degraded during charge and discharge, an electrode and a lithium ion battery having excellent charge and discharge characteristics for which the electrode material is used are provided. The electrode material includes electrode active material particles having a carbonaceous film formed on surfaces thereof, and an affinity value to N-methyl-2-pyrrolidone measured through pulse NMR is in a range of 5000 to 20000.

主权项

1. An electrode material comprising:
a carbonaceous film formed on surfaces of electrode active material particles, wherein an affinity value to N-methyl-2-pyrrolidone of the electrode material measured through pulse NMR is in a range of 5000 to 20000, wherein the carbonaceous film is substantially uniformly formed on the surfaces of the electrode active material particles, wherein a film thickness of the carbonaceous film is in a range of 0.1 nm to 10.0 nm, wherein a coating ratio of the carbonaceous film in the carbonaceous film coated electrode active material particles is 80% or more, and wherein an amount of carbon in the electrode material is in a range of 0.8% by mass to 3% by mass.