Large-scale preparation of black phosphorus by molten salt method for energy storage
Shaojie Zhang,
Zili Qin,
Zhiguo Hou,
Jiajia Ye,
Zhibin Xu,
Yitai Qian
Affiliations
Shaojie Zhang
School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China; School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, China
Zili Qin
School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, China
Zhiguo Hou
School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, China; Corresponding authors.
Jiajia Ye
School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, China
Zhibin Xu
School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, China
Yitai Qian
School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China; School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, China; Corresponding authors.
Black phosphorus (BP) is a new layered material in concept, which has attracted great interest due to its fascinating optical and electrochemical properties. Here, we report the large scale synthesis of BP (20 g) by reducing PCl5 with metallic Al in melt AlCl3 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 2 µm 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.
