黑磷/石墨烯锂电池负极材料的制备与电化学性能研究

摘要：目前锂离子电池的负极材料主要以碳材料为主，但是碳的理论容量较低。而硅作为锂电池负极材料其体积膨胀太严重。黑磷以其极高理论容量以及单层黑磷和石墨烯类似结构受到成为电池的新型材料。本实验采用电化学沉积方法制得以泡沫镍为基底的石墨烯包覆黑磷纳米片的纳米复合材料。黑磷纳米片都被石墨烯包覆着分布在泡沫镍表面，被还原后的氧化石墨烯包覆在黑磷纳米片外，增加了稳定性。电化学测试显示首次放电容量达到2140 Ah g-1接近黑磷的理论容量；在3A/g 的大电流密度下, 石墨烯包覆黑磷纳米片负极材料的放电容量会有所下降但是首次放电容量依然接近理论值。其倍率性能比较好,。

关键词：锂离子电池 负极材料 黑磷 石墨烯

Synthesis and Electrochemical Performance of Black Phosphorus /Graphene Anode Material for Lithium Ion Batteries

Abstract:Black phosphorus @graphene nanocomposites were in-situ prepared by electrochemical deposition method. Graphite oxide and black phosphorus are used as raw material and nickel foam is the substrate .The analysis results indicate that the black phosphorus nanosheets are covered with graphene on the surface of the foam nickel. The electrochemical test results show that the reduced oxide graphene is coated on the black phosphorous nanosheet and the stability is increased. The first discharge capacity reaches 2140 Ah g-1 is close to the theoretical capacity of black phosphorus. In the case of 2,3 A / g At high current densities, the discharge capacity of graphene-coated black phosphor nanosheets negative materials can still be maintained at 1000 Ah g-1, respectively, indicating that the higher magnification performance showed better magnification performance, the results attributed to graphene Good electrical conductivity and its carbon-coated special structure.

Key Words：lithium-ion battery; anode material; black phosphorus; graphene