  This paper develops a new solution of gravitational vacuum star in the
background of charged Kiselev black holes as an exterior manifold. We explore
physical features and stability of thin-shell gravastars with radial
perturbation. The matter thin layer located at thin-shell greatly affects
stable configuration of the developed structure. We assume three different
choices of matter distribution such as barotropic, generalized Chaplygin gas
and generalized phantomlike equation of state. The last two models depend on
the shell radius, also known as variable equation of state. For barotropic
model, the structure of thin-shell gravastar is mostly unstable while it shows
stable configuration for such type of matter distribution with extraordinary
quintessence parameter. The resulting gravastar structure indicates stable
behavior for generalized Chaplygin gas but unstable for generalized phantomlike
model. It is also found that proper length, entropy and energy within the shell
show linear relation with thickness of the shell.
