METHOD FOR PREPARING BLACK PHOSPHORUS OR BLACK PHOSPHORUS-CARBON COMPOSITE, PREPARED BLACK PHOSPHORUS AND BLACK PHOSPHORUS-CARBON COMPOSITE, LITHIUM RECHARGEABLE BATTERY COMPRISING THE BLACK PHOSPHORUS-CARBON COMPOSITE, AND METHOD FOR USING THE RECHARGEABLE BATTERY

摘要

PROBLEM TO BE SOLVED: To provide: methods for preparing black phosphorus and a black phosphorus-carbon composite; the prepared black phosphorus and black phosphorus-carbon composite; a lithium rechargeable battery containing the black phosphorus-carbon composite; and a method for using the rechargeable battery. SOLUTION: The method for preparing black phosphorus enables easy and efficient preparation of black phosphorus from red phosphorus and is different from an existing method by which it is very difficult to prepare black phosphorus because a high pressure and a high temperature are required in the preparation of black phosphorus. Further, the black phosphorus-carbon composite having crystallinity, stability and electronic conductivity is used as a cathode material of the rechargeable battery. Thereby, the preservation and removal of lithium are made possible in the rechargeable battery, unlike red phosphorus with which only the preservation of lithium is possible. In the case when the black phosphorus-carbon composite is used as the cathode material of the rechargeable battery, a fracture phenomenon of the cathode material caused by its volume change is minimized and the mechanical stability can be secured, and the capacity and cycle life are improved. COPYRIGHT: (C)2009,JPO&INPIT