Power storage system and manufacturing method therefor and secondary battery and capacitor

A method for manufacturing a power storage system, the method comprising the steps of:

• forming an amorphous silicon film on a current collector;
• adding a catalytic element for promoting crystallization of amorphous silicon, onto a surface of the amorphous silicon film;
• and
• heating the amorphous silicon film with the catalytic element added to crystallize the amorphous silicon film, thereby forming a crystalline silicon film having an oxide of the catalytic element on the current collector.

A method for manufacturing a power storage system, the method comprising the steps of:

• forming an amorphous silicon film on a current collector;
• adding a solution containing a catalytic element for promoting crystallization of amorphous silicon, onto a surface of the amorphous silicon film;
• keeping the solution containing the catalytic element uniformly on the surface of the amorphous silicon film;
• and
• heating the amorphous silicon film with the catalytic element kept to crystallize the amorphous silicon film, thereby forming a crystalline silicon film on the current collector and forming an oxide of the catalytic element at an surface of the crystalline silicon film.