How to create a folder in a documents library in Sharepoint Online with Powershell

I'm using this piece of code:

$SPFolder = $list.Folders.Add("", [Microsoft.SharePoint.SPFileSystemObjectType]::Folder, $Folder)
$SPFolder.Update();

But i always get the same error

"Unable to find type [Microsoft.SharePoint.SPFileSystemObjectType]: make sure that the assembly containing this type is loaded."

Does this only work with Sharepoint 2010? I'm using Sharepoint 2013 

Thanks

Dearbhla Bradley