The invention belongs to the technical field of lithium batteries, and discloses a lithium-selenium battery positive electrode material capable of reducing loss of polyselenide, an electrode plate anda button cell The positive electrode material of the lithium-selenium battery is prepared by the following steps of (1) preparing cobalt-containing porous carbon; (2) mixing elemental selenium withthe cobalt-containing porous carbon, heating and reacting in a protective atmosphere to obtain the positive electrode material, wherein the heating reaction temperature ranges from 200 DEG C to 300 DEG C The electrode plate is prepared from the positive electrode material The button cell comprises the electrode plate The mesoporous structure of the porous carbon matrix in the positive electrodematerial disclosed by the invention is connected in a staggered manner, so that the diffusion of electrons and ions is facilitated, and in addition, the volume expansion of selenium in the charging and discharging process can be reduced; and the positive electrode material can prevent the polyselenide from being dissolved, so that the loss of polyselenide is reduced; and the positive electrode material disclosed by the invention has excellent electrochemical performance

Lithium-selenium battery positive electrode material capable of reducing loss of polyselenide, electrode plate and button cell

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Lithium-selenium battery positive electrode material capable of reducing loss of polyselenide, electrode plate and button cell