To provide a power storage device in which a charged state can be prevented from being difficult to be detected even in cases when charge and discharge are repeated.
A first forming region 18b where a first positive electrode active material layer 26 containing a first positive electrode active material is formed is provided on both surfaces of a metal foil 25 constituting a first positive electrode sheet 18, while a second forming region 19b where a second positive electrode active material layer 27 containing a second positive electrode active material having a potential lower than that of the first positive electrode active material is formed is provided on both surfaces of a metal foil 25 constituting a second positive electrode sheet 19.
TOMIOKA MASAMI
KINOSHITA KYOICHI
Makoto Onda
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