Carbonaceous material for hydrogen storage, and method for preparation thereof, carbonaceous material having hydrogen absorbed therein and method for preparation thereof, cell and fuel cell using carbonaceous material having hydrogen absorbed therein

摘要

The present invention provides a hydrogen-stored carbonaceous material obtained by storing hydrogen in a carbonaceous material heated at more than 230 C. under a pressure reducing atmosphere, a battery and a fuel cell using this hydrogen-stored carbonaceous material. The carbonaceous material is heated at more than 230 C. under the pressure reducing atmosphere so that its surface can be efficiently cleaned and an area where the surface of the carbonaceous material comes into contact with hydrogen atoms or hydrogen molecules is increased.