There is no cmdlet for that, but you can use the Tasks and Events that are kept on vCenter.
To access those you use the Get-VIEvent cmdlet.
You can also have a look at my Get-VIEventPlus function in my Get the vMotion/svMotion history post.
In my HA VM failover tracking post I explain how to find the available eventtypes.
In this case you will want to fetch the VmPoweredOffEvent event
