Hydrogenation operates the bending motion of mover device, which is a platinum coated La Ni alloy film deposited on a polyimide sheet, has been successfully developed. Influence of the operating temperature on the motion strain has been evaluated. When the operating temperature is 373 K, the maximum value of bending strain (De) is 408 ppm, which is 1.4 times larger than that (300 ppm) of an unheated film operated at 323 K.

Hydrogenation operated unimorph device, which is composed of LaNi x hydrogen storage alloy film with Pd over layer, deposited on a carbon fiber reinforced polymer (CFRP) substrate, has been successfully developed. As a result, the bending motion after 100 s, palladium coated LaNi x alloy film with the CFRP supporting sheet exhibits the large bending strain of about 250 ppm, which is 6 times larger than that of the Pt coating LaNi x film on CFRP.

To obtain the high power mover device with high responsiveness, mover devices driven by hydrogen storage alloy film have been successfully developed. The effect of load on bending movement of LaNi 5 hydrogen storage alloy film deposited on thin copper substrate has been studied. The thin copper sheets, 10 mm in thickness, have been prepared by cold rolling. As a result, the power of the mover device is higher than that of the Ni Ti shape memory alloy commercially used.