The work is devoted to the study of derivations in group algebras using the results
of combinatorial group theory. A survey of old results is given, describing derivations in group
algebras as characters on an adjoint action groupoid. In this paper, new assertions are presented
that make it possible to connect derivations of group algebras with the theory of ends of groups
and in particular the Stallings theorem. A homological interpretation of the results obtained
is also given. We also construct a generalization of the proposed construction for the case of
modules over a group ring.