HYDROGEN STORAGE CAPACITY MEASUREMENT METHOD AND HYDROGEN STORAGE CAPACITY MEASUREMENT APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a hydrogen storage capacity measurement method which allows measurement even under a mixture gas atmosphere.SOLUTION: First of all, in the state at prescribed temperature in a vacuum, a sample 3 is irradiated with X-rays to acquire X-ray diffraction data (step S1). Next, in the state at prescribed temperature with prescribed pressure under an atmosphere of hydrogen or mixture gas containing hydrogen, the sample 3 is irradiated with X-rays to acquire X-ray diffraction data (step S2). Next, a lattice volume is calculated using the X-ray diffraction data acquired in the steps S1 and S2 to calculate a lattice volume expansion amount (step S3). Next, using a relation between a lattice volume expansion amount corresponding to crystal structure of the sample 3 and hydrogen storage capacity, hydrogen storage capacity is calculated from the lattice volume expansion amount calculated in the step S2 (step S4).SELECTED DRAWING: Figure 4