The present invention is a purification system for removing hydrogen fluoride and water from an electrolytic solution for lithium-ion secondary batteries in which [1] a purifier for removing hydrogen fluoride containing a hydrogen fluoride adsorbent select...

A fuel cell cartridge (1) includes a fuel reservoir (1a) configured to supply fuel to a fuel-cell power generation part (50) and has a water-absorber (2) configured to absorb water formed in the fuel-cell power generation part (50), at least on part of its...