High energy gel static vanadium battery

Abstract

The invention relates to a high-energy gel static vanadium battery, which uses a positive electrode gel state electrolyte and a negative electrode gel state electrolyte. The concentration range of the active material is between 3.0-7.0M, and the acidity range of the sulfuric acid in the positive gel electrolyte is 3.0-6.0M; the concentration range of the vanadium active material in the negative gel electrolyte is 3.0-7.0M, and the negative gel electrolyte The sulfuric acid concentration range of the liquid is 3.0-5.7M, wherein, the positive electrode gel electrolyte contains 1-10wt% gelling agent, and the negative electrode gel state electrolyte contains 1-5wt% gelling agent. The invention improves the energy density of the battery, improves the crystallization phenomenon of the electrolyte, relieves the osmotic pressure difference between the positive and negative electrodes, and prolongs the life of the battery.

Description

technical field [0001] The invention relates to a high-energy gel static vanadium battery. Background technique [0002] The all-vanadium redox flow battery is a redox battery in which the active material is in a circulating liquid state. The electrical energy of the vanadium battery is stored in the sulfuric acid electrolyte of vanadium ions in different valence states in the form of chemical energy, and the electrolysis is hydraulically injected into the battery stack through an external pump, and under the action of mechanical power, it is stored in different liquid storage tanks and half-cells. Circulating flow in a closed circuit, using the proton exchange membrane as the diaphragm of the battery pack, the electrolyte solution flows in parallel across the electrode surface and undergoes an electrochemical reaction, and collects and conducts current through the double-electrode plate, thereby converting the chemical energy stored in the solution into electrical energy ....

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the inconsistency of the osmotic pressure on both sides and the easy crystallization of the electrolyte caused by the migration of the positive and negative electrolytes in the battery in the above-mentioned prior art during charging and discharging, a high-energy gel static vanadium battery is proposed, which uses a positive gel state Electrolyte and negative electrode gel state electrolyte, the two respectively comprise vanadium active material, acid (sulfuric acid) and gelling agent, the vanadium active material concentration range of positive electrode gel state electrolyte is between 3.0-7.0M, preferably 3.5-6.5 M, more preferably 4-6M, the sulfuric acid acidity range of the positive electrode gel state electrolyte is 3.0-6.0M, preferably 3.5-5.5M; the concentration range of the vanadium active material of the negative electrode gel state electrolyte is 3.0-7.0M, preferably 3.5 -6.5M, the sulfuric acid concentration range of the negative electrode gel state electrolyte is 3.0-5.7M, preferably 3.5-5.0M, wherein, the positive electrode gel state electrolyte contains 1-10wt%, preferably 2-8wt% gelling agent, the negative electrode Gel state electrolyte contains 1-5wt%, preferably 2-4wt% gelling agent

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