Export library or list using Power shell

this code for export library

export-spweb -itemurl "/library%20Doc/" -path "D:\libexport.cmp" -identity "http://igrid103:55555"
this code is for export list

export-spweb -itemurl "/Lists/detail/" -path "D:\New folder\libexport.cmp" -identity "http://igrid103:55555"