With silicon material(BFSi)extracted from blast furnace slag as silicon source and polyacrylonitrile(PAN)as carbon source,a kind of silicon-carbon anode material for lithium-ion batteries was synthesized.And the influence of ratio of silicon to polyacrylonitrile on the BFSi@C material was investigated.Results show that BFSi@C synthesized with BFSi and PAN in a mass ratio of 3:1 delivers an initial charge capacity of 1 884.99 mAh/g at a curr-ent density of 0.5 A/g.After 100 cycles,it still delivers a specific charge capacity of 1 509.32 mAh/g,with a capacity retention rate of 80.07％.Moreover,it presents excellent rate performance at high current densities.Compared with commercial silicon materials,BFSi@C demonstrates higher cycle capacity and superior rate performance,delivering a specific capacity up to 538.31 mAh/g at a current density of 5 A/g.
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