Abstract: Endothermic particles for a non-aqueous electrolyte rechargeable battery include at least partially modified metal hydroxide particles, wherein an amount of desorbed CH4 from about 80° C. to about 1400° C. by thermal desorption gas mass spectrometry (TDS-MS) of the metal hydroxide particles is between about 15×10?6 mol/g and about 3000×10?6 mol/g, an amount of desorbed CH3OH from about 80° C. to about 1400° C. by TDS-MS is between about 15×10?6 mol/g and about 6000×10?6 mol/g, an amount of desorbed H2O from about 80° C. to about 200° C. by TDS-MS is between about 30×10?6 mol/g and about 1500×10?6 mol/g, and a specific surface area of the metal hydroxide particles calculated by an adsorption isotherm measured by adsorbing water vapor or nitrogen to the metal hydroxide particles is between about 8 m2/g and about 600 m2/g.

Abstract: The composite particles for a non-aqueous electrolyte rechargeable battery are surface-treated composite particles including metal hydroxide particles and conductive particles, wherein a volume resistivity of the composite particles at the time of about 60 MPa pressurization is greater than or equal to about 0.10 ?cm and less than or equal to about 4 × 104 ?cm, an endothermic amount of the composite particles between about 50° C. to about 250° C. in differential scanning calorimetry is greater than or equal to about 150 J/g and less than or equal to about 500 J/g, and an amount of desorbed P2 (MS1) of the composite particles from about 80° C. to about 1400° C. by thermal desorption gas mass spectrometry (TDS-MS) is greater than or equal to about 300 × 10-6 mol/g and less than or equal to about 3000 × 10-6 mol/g.

Abstract: Composite carbon particles including a porous carbon material and a silicon component, the composite carbon particle having an average aspect ratio of 1.25 or less, and a ratio (ISi/IG) of a peak intensity (ISi) in the vicinity of 470 cm?1 to a peak intensity (IG) in the vicinity of 1580 cm?1 as measured by Raman spectroscopy of 0.30 or less, wherein the porous carbon material satisfies V1/V0>0.80 and V2/V0<0.10, when a total pore volume at a maximum value of a relative pressure P/P0 is defined as V0 and P0 is a saturated vapor pressure, a cumulative pore volume at a relative pressure P/P0=0.1 is defined as V1, a cumulative pore volume at a relative pressure P/P0=10?7 is defined as V2 in a nitrogen adsorption test, and has a BET specific surface area of 800 m2/g or more.

Abstract: An object of the present invention is to provide a composite material usable as a negative electrode material of a lithium-ion secondary battery. A composite material of the present invention includes: a carbonaceous material; and a metal oxide layer coating a surface of the carbonaceous material, in which the metal oxide layer coats the surface of the carbonaceous material, forming a sea-island structure in which the metal oxide layer is scattered in islands, and a coating rate of the carbonaceous material with the metal oxide layer is 20% or more and 80% or less. A composite material of the present invention includes: a carbonaceous material; and a metal oxide layer and amorphous carbon layer coating the surface of the carbonaceous material, in which the metal oxide layer is scattered in islands on the surface of the carbonaceous material.