Providing a vehicular shock absorbing device and a vehicular shock absorbing structure, which includes a crash box composed of a hollow structure having a transverse cross sectional surface area which gradually decreases in the backward direction of the ve...

A lithium-ion secondary battery 10 consisting of a laminar member 40 including a positive electrode collector layer 12, a positive electrode layer 16 consisting of a vapor-deposited polymer film 26 containing a positive electrode active substance 24, and p...