Black phosphorus(BP)is a new layered material in concept,which has attracted great interest due to its fascinat-ing optical and electrochemical properties.Here,we report the large scale synthesis of BP(20 g)by reducin...Black phosphorus(BP)is a new layered material in concept,which has attracted great interest due to its fascinat-ing optical and electrochemical properties.Here,we report the large scale synthesis of BP(20 g)by reducing PCl 5 with metallic Al in melt AlCl 3 at 300°C.X-ray diffraction indicates the orthorhombic structure of BP and Raman spectrum shows that there is no obvious impurities.BP samples consist of micron-sized clusters of about 2μm aggregated by flake-like nanoparticles with 20-100 nm.When used as anode materials for lithium ion battery,it exhibits a high specific capacity of 1610 m Ah g−1 at a current density of 0.1C,and cycle life up to 1000 cycles at a current density of 5C.In addition,through gradient centrifugation of as-prepared BP samples,gram-scale BP quantum dots can be obtained.展开更多
基金This work was financially supported by the National Natural Science Foundation of China(21875238)Jiangsu Province Natural Science Re-search of Universities(20KJB150007)+1 种基金the Applied Basic Research Pro-grams of Changzhou(CJ20200034)and Changzhou Science and Tech-nology Young Talents Promotion Project(KYZ21005).
文摘Black phosphorus(BP)is a new layered material in concept,which has attracted great interest due to its fascinat-ing optical and electrochemical properties.Here,we report the large scale synthesis of BP(20 g)by reducing PCl 5 with metallic Al in melt AlCl 3 at 300°C.X-ray diffraction indicates the orthorhombic structure of BP and Raman spectrum shows that there is no obvious impurities.BP samples consist of micron-sized clusters of about 2μm aggregated by flake-like nanoparticles with 20-100 nm.When used as anode materials for lithium ion battery,it exhibits a high specific capacity of 1610 m Ah g−1 at a current density of 0.1C,and cycle life up to 1000 cycles at a current density of 5C.In addition,through gradient centrifugation of as-prepared BP samples,gram-scale BP quantum dots can be obtained.
