| abstract |
Provided are a mass of crystalline graphite flakes or the like, which is useful as an electrode material for lithium ion batteries, hybrid capacitors and so on, a method for efficiently producing the same at a high productivity, etc. Specifically disclosed is a method for producing a mass of crystalline graphite flakes or the like which consists of flaky graphite crystals extending outward from the inside and aggregating together, comprising, for example, air-tightly sealing a powder of an organic compound, which has been calcined while allowing hydrogen to remain therein, in a graphite container, and then subjecting the powder, as in the state of being sealed in said container, to a hot isostatic pressing (HIP) treatment using a pressurized atmosphere under definite conditions. |