You should consult with an family law attorney. Immigration status does not influence a person's ability to collect maintenance. Whether the wife is entitled to maintenance is the question you must ask to the family law attorney. Good luck!
You still qualify to apply for "VAWA."As a battered spouse of USC, you can file an immigrant visa petition without your spouse's signture/knowledge. This allows victims to seek both safety and independence from their abuser, who is not notified about the filing.
Consult with an atttorney. I wish you luck.