Electric potential and the flow of electrons in a battery
The problem that there is actually an ambiguity with the definitions. So:

1) There is a conventional current flow direction that is defined as the flow from the higher potential to the low. It was defined a while ago, upon the discovery of the electricity. And it was defined incorrectly, but we still use it.

2) There is an electron flow. It is going from low potential to the high one thus opposite to the conventional flow.

So.. We have to live with that or...



(Copyright notice: The image is taken from the XKCD.com comics site)