  A simulation model and design of Titanium Manganese Redox Flow Battery
(TMRFB) is proposed to study the distribution of dissociation rate,
overpotential, current density, and electrode potential. TMRFB is one of the
most promising new energy storages because of its high capacity and
eco-friendly characteristics in the current condition of energy scarcity and
environmental pollution. Moreover, Mn-based flow batteries are gaining
popularity due to their inexpensive cost and high energy density in lieu of all
vanadium redox flow batteries which are expensive. This research shows that the
surface dissociation rate of Ti4+/ Ti3+ and Mn3+/Mn2+ ions are higher at the
membrane and lower at the inlet where the velocity of the electrolyte flow is
higher; Furthermore, our work reveals that when the thickness of the electrode
is compressed from 4.5 mm to 3 mm, overpotential reduces whereas current
density and electrode potential increases. The COMSOL Multiphysics software is
used to solve the model's equations using the finite element approach. From the
dissociation rate it is concluded that less potential is required at the
membrane for the oxidation reduction reaction and with optimized electrolyte
flow rate battery performance can be improved. Thus, electrode compression
increases conductivity and battery performance.
