Anode material for all-solid secondary battery, anode layer and all-solid secondary battery including the same, and manufacturing method thereof

An anode material for all-solid secondary batteries, the anode material comprising a metal-carbon composite, wherein:

• the metal-carbon composite includes:
• a carbon material;
• and
• metal particles,
• the carbon material includes a carbonyl group, an ether group, a carboxylate group, an anhydride group, an aldehyde group, a lactone group, a phenol group, or a quinone group,
• the metal particles are dispersed in the carbon material, between particles of the carbon material, on a surface of the carbon material, or in two or more locations thereof,
• the metal particles form a complex with the carbon material through ionic or covalent bonding,
• the metal-carbon composite has a metal-oxygen bond-related peak in a Raman spectrum,
• in the Raman spectrum, the metal-oxygen bond-related peak exists at a Raman shift of about 200 cm−1, about 470 cm−1, or about 990 cm−1, wherein the Raman spectrum is measured using a UV laser having a wavelength of about 514˜516 nm, and
• in a case of performing thermogravimetric analyses on randomly selected multiple sites of the same sample, in each thermogravimetric analysis of the metal-carbon composite, when a straight line connecting points of respective weight percentages (%) at a thermal decomposition temperature of 500° C. and a final temperature at which no further weight loss occurs is expressed by a linear equation represented by Equation 1 below,
• Y=−AX+B <Equation 1>
• in Equation 1, X is a thermal decomposition temperature in° C., Y is a weight loss rate, −A is a slope, and B is a y-intercept, and
• ΔA, which is a difference between values of A in each thermogravimetric analysis, is about 0.06 or less, and ΔB, which is a difference between values of B in each thermogravimetric analysis, is about 30 or less.