Halliche had a spell on trial at Celtic last season, but a move to the Scottish giants never materialised.
"He's a good boy," Jol told the Fulham Chronicle. "I've played him a couple of times and he looks good, but we've got six or seven centre-backs.
"That doesn't make it easy for him so we're still looking to maybe put him out on loan somewhere.
"He wants and needs to play. He's an international player so hopefully we find something for him."