Electrode material, electrode and lithium ion battery

摘要

An electrode material contains an agglomerate formed by agglomerating a plurality of agglomerated particles formed by agglomerating a plurality of particles of a carbonaceous coated electrode active material having a carbonaceous coat formed on a surface, the agglomerate is made up of hollow-structured particles and solid-structured particles, the average particle diameter of the agglomerate is in a range of 0.5 μm to 100 μm, the volume density of the agglomerate is in a range of 50% by volume to 80% by volume, the micropore distribution of micropores present in the agglomerate is monomodal, the average micropore diameter in the micropore distribution is 0.3 μm or less, and the NMP oil absorption amount of the agglomerate is in a range of 40 g/100 g to 100 g/100 g.

主权项

1. An electrode material comprising:
an agglomerate formed by agglomerating a plurality of agglomerated particles formed by agglomerating a plurality of particles of a carbonaceous coated electrode active material having a carbonaceous coat formed on a surface, wherein the agglomerate is made up of hollow-structured particles containing voids and solid-structured particles, an average particle diameter of the agglomerate is in a range of 0.5 μm to 100 μm, a volume density of the agglomerate is in a range of 50% by volume to 80% by volume of a theoretical density of the electrode active material, a micropore distribution of micropores present in the agglomerate is monomodal, an average micropore diameter in the micropore distribution is 0.3 μm or less, and an N-methyl-2-pyrollidone oil absorption amount of the agglomerate is in a range of 40 g/100 g to 100 g/100 g, a diameter of the voids in the hollow-structured particles is in a range of 3.5 μm to 5.5 μm, and a ratio of a number of the hollow-structured particles of the agglomerates to a number of both of the hollow-structured particles and the solid-structured particles of the agglomerates is in the range of 15/50 to 24/50.