To provide a non-aqueous electrolyte secondary battery having a high capacity and excellent in cyclic characteristics.
Each composite particle is structured so that part or the whole of the peripheral surface of nuclear particle consisting of a solid phase A is covered with another solid phase B, wherein the solid phase A contains at least one of the silicon and zinc as the constituent element while the phase B is a solid solution or intermetallic compound of either silicon or zinc and at least one of the group II elements, transition elements, group XII and XIII elements, and group XIV elements except carbon in the periodic table excluding the above-mentioned constituent elements of the phase A, and these composite particles are used as a negative electrode material, and thereto a fluorinated carbon compound expressed by (CxF)n (1≤x<20) is added as a substance to make irreversible reductive reaction with lithium ions.
KOSHINA HIDE
SHIMAMURA HARUNARI
NITTA YOSHIAKI
Next Patent: NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY