In what ways did orthodox trinitarianism diverge from Tertullian's proto-trinitarianism?

Tertullian is well known as the first Latin writer to use the word "trinity" (*trinitas*) and as a proponent of trinitarian doctrine in general. But there were many trinitarian controversies between his time and that of the Nicene Creed. Books and articles about the doctrine often say that it was not "settled" until then (or later). What aspects of Tertullian's doctrine of the trinity are claimed by scholars to be opposed to later orthodox formulations of the doctrine? And where specifically in his writings do such scholars point to make their case?