High energy density, power density and long cycle life are the ultimate goals of lithium ion batteries (LIBs) to meet the need of energy storage. However, it is still a challenge to achieve them at the same time. In this work, Bi₂Se_0.5Te_2.5/S, N-doped reduced graphene oxide (rGO) nanosheets composite has been synthesized by solvothermal method and investigated as anode materials for LIBs. The nanosheets are triumplantly fixed on rGO. Nitrogen doping can improve the electrical conductivity, while sulfur provide more active sites. The Bi₂Se_0.5Te_2.5/S, N-rGO exhibits superior electrochemical performance. The specific discharge capacity of the Bi₂Se_0.5Te_2.5/S, N-rGO composites at 100 mA g ⁻¹ is 500 mAh g ⁻¹after 200 cycles, and which is still on the rise. Dynamics analysis clearly shows that the lithium storage of the as-prepared samples is on account of diffusion process, whose capacitive contribution reaches 92% of the total charge storage at a scanning rate of 1.0 mV s ^-1, and contributes to excellent cycling performance at high current densities. This work shows that Bi₂Se_0.5Te _2.5 /S, N-rGO has broad application prospects in LIBs.

高能量密度、高功率密度和长循环寿命是锂离子电池（LIBs）满足储能需求的最终目标。然而，同时实现它们仍然是一个挑战。在这项工作中，通过溶剂热法合成了Bi ₂ Se _0.5 Te _2.5 /S、N掺杂的还原氧化石墨烯（rGO）纳米片复合材料，并作为LIBs的负极材料进行了研究。纳米片成功地固定在 rGO 上。氮掺杂可以提高电导率，而硫提供更多的活性位点。Bi ₂ Se _0.5 Te _2.5 /S，N-rGO表现出优异的电化学性能。_{Bi 2} Se的比放电容量_0.5 Te _2.5 /S，N-rGO复合材料在100  mA  g ^-1 200次循环后为500 mAh g ^-1，并且仍在上升。动力学分析清楚地表明，所制备样品的锂存储是由于扩散过程，在扫描速率为 1.0  mV  s ^-1时，其电容贡献达到总电荷存储的 92%，并有助于在高电流密度。本工作表明Bi ₂ Se _0.5 Te _2.5 /S，N-rGO在LIBs中具有广阔的应用前景。