In this study, we use a rapid, convenient, and cost-effective precipitation method to synthesis Fe1-xS@C anode materials for use in lithium ion batteries (LIBs). We found that using a special carbon source acetylene black can lead to higher discharge specific capacity and a long cycling life of the LIB with Fe1-xS@C anode. The sample prepared with 10 wt% of the carbon source and calcined at 600 °C showed the best electrochemical performance. The optimum Fe1-xS@C sample maintained a very stable

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... tate after the initial 30 cycles of attenuation at 100 mA·g -1 and exhibited a high and stable reversible capacity of 644 mA·h·g -1 until the 200th cycle.