FeLVB

FeLVB is a term used in theoretical discussions and speculative fiction to denote a hypothetical energy storage concept called the Ferric-Lithium-Vanadium Battery. The name reflects the proposed combination of iron-based electrode chemistry, lithium-ion transport, and a vanadium-containing component intended to enable fast redox reactions. The concept emerged in theoretical and industry discourse in the early 2020s as part of broader explorations of lower-cost, high-energy-density batteries using earth-abundant elements.

In the theoretical model, a ferrite-like iron oxide electrode would host Li+ intercalation, paired with a vanadium redox couple in the electrolyte or a vanadium-containing counter electrode to improve rate capability and cyclability. Proponents claim this arrangement could unlock higher operating voltage and energy density while leveraging iron's abundance and potential for safer operation. The design remains speculative, and specific chemistries vary across sources, with different proposals for electrode structure and electrolyte composition.

Reality and status: there is no experimental demonstration of a working FeLVB battery. Technical challenges cited include chemical stability of iron oxides under repeated lithiation/delithiation, compatibility of vanadium species with the electrolyte, dendrite formation, and overall cycle life. Practical manufacturing, cost considerations, and safety implications are uncertain; as a result, FeLVB is discussed mainly as a concept in reviews, theoretical papers, and science fiction settings.

See also: iron-based batteries, vanadium redox flow battery, lithium-ion battery.