| abstract |
The present invention provides flaky graphite crystal blocks and the like which can be used as electrode materials for lithium ion batteries, hybrid capacitors, etc., and methods for producing them with high efficiency and high productivity. A method for producing flaky graphite crystal blocks, etc., in which flaky graphite crystals extending from the inside to the outside are assembled, by sealing the powder or grain of an organic compound calcined so as to contain residual hydrogen in a container made of graphite , under predetermined conditions, a hot isostatic pressing treatment (HIP treatment) using a pressurized atmosphere is performed together with the container. |