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Cell voltage model for Li-Bi liquid metal batteries
Lithium-bismuth bimetallic cells are amongst the best explored liquid metal batteries. A simple and fast one-dimensional cell voltage model for such devices is presented. The equilibrium cell potential is obtained from a complex two-dimensional ﬁt of data drawn from multiple studies of equilibrium cell potential and rendered congruent with the phase diagram. Likewise, several analytical and ﬁt functions for the ohmic potential drop across the electrolyte are provided for diﬀerent battery geometries. Mass transport overpotentials originating from the alloying of Li into Bi are modelled by solving a diﬀusion equation, either analytically or numerically, and accounting for the volume change of the positive electrode. The applicability and limitations of the model are ﬁnally illustrated in three distinct experimental settings.
- Cell voltage model for Li-Bi liquid metal batteries (Id 33890) HZDR-primary research data are used by this (Id 33058) publication
Applied Energy 309(2022), 118331
- Secondary publication expected from 12.01.2023