FIELD: electric elements.
SUBSTANCE: invention relates to lithium-ion batteries. Negative electrode material is obtained by impregnating porous carbon pores with silicon, wherein the porous carbon contains pitch and magnesium acetate (MgOAc) in a weight ratio of 1.5:1 to 4:1 or in a weight ratio of 7:3.
EFFECT: increased service life and output power.
6 cl, 1 dwg, 1 tbl
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