High concentration zinc and vanadium redox cell

Abstract

The invention discloses a high concentration zinc and vanadium redox cell. According to the invention, the novel zinc vanadium oxidation reduction cell is characterized in that a vanadium ion solution is taken as an anode active substance, zinc and a zinc ion solution are taken as an cathode active substance, wherein the equilibrium potential is 1.76 V under a standard state, the open-circuit voltage is 1.7 - 2.0 V under a charging state. The vanadium ions of the vanadium ion solution are existed as quintavalence and quadrivalence (V(I), V(IV)), and the total vanadium concentration can reach to 4.0 mol / L, a solvent is inorganic acid or organic acid. The zinc ion solution is a zinc ion electrolyte containing organic acid or inorganic acid. The organic acid is methanesulfonic acid or sulfamic acid. The inorganic acid is sulfuric acid or nitric acid. The high energy concentration redox cell can be exploited according to the invention.

Description

technical field

[0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a high-concentration zinc-vanadium redox battery composed of vanadium ion electrolyte as positive active material and zinc and zinc ion electrolyte as negative active material. Background technique

[0002] In today's energy field, the development and utilization of renewable energy such as solar energy and wind energy has attracted more and more attention. In order to achieve the stability of power supply, it is necessary to develop efficient large-scale energy storage technology. Secondary batteries are an important energy storage technology. Among them, redox flow batteries, such as all-vanadium batteries, zinc-bromine batteries, sodium polysulfide / bromine batteries, etc., have been researched and developed due to their special advantages in the direction of large-scale power storage, and will gradually be put on the market.

[0003] A redox flow ba...

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