  The kinetic Monte Carlo method is applied to examine effects of hydrostatic
pressure on the benzimidazolium azelate (BenAze) proton conductivity. Following
the experimental indications the recently proposed model has been modified to
simulate the transport phenomena under moderate pressure, resulting in a very
good agreement between numerical and experimental results. We demonstrate that
the pressure-induced changes in the proton conductivity can be attributed to
solely two parameters: the length of the hydrogen bond and the amplitude of
lattice vibrations while other processes play a more minor role. It may provide
an insight into tailoring new materials with improved proton-conducting
properties. Furthermore, in high-pressure regime we anticipate the crossover
from the increasing to decreasing temperature dependence of the proton
conductivity resulting from the changes in the hydrogen-bond activation barrier
with increased pressure.
