There is a possibility that USCIS may require an interview before approving the i-751. If that is the case, your husband would be expected to show up at the interview together. It may be problematic if your husband then refuses to accompany you to the interview. In such a situation, I recommend consulting an experienced immigration attorney who can analyze the specifics of your particular case and represent you to the best of his abilities.
Also note that you would have to wait another three years to be eligible for a citizenship if your marriage to a U.S. citizen is terminated.
I wish you the best.