You Do Need power plug adapter while traveling from Åland Islands to Liberia.

Here is Why You Need An Adapter

The outlet and plug type used in Liberia are A, B, C and F and in Åland Islands are C and F. This is how they look like.

Åland Islands

In Åland Islands, outlets of type C and F are in use.

Type C

Type F

Liberia

In Liberia, outlets of type A, B, C and F are in use.

Type A

Type B

Type C

Type F