JP-2022535691-A5 -

Dates

Publication Date

20230519

Application Date

20200518

Description

The above specification provides a description of the manufacture and use of the present invention. Since many embodiments of the present invention can be made without departing from the spirit and scope of the invention, the present invention also falls under the claims appended below. Another aspect of the present invention may be as follows: [1] A system, A redox flow battery system, A solution of anodin, Cathode liquid and A first half-cell comprising a first electrode in contact with the anode liquid, A second half-cell comprising a second electrode in contact with the cathode liquid, A first separator separates the first half-cell from the second half-cell, A redox flow battery system equipped with, It is a balancing device, A balanced electrolyte containing vanadium ions in the solution, A third half-cell comprising a third electrode in contact with the anode liquid or the cathode liquid, A fourth half-cell comprising a fourth electrode in contact with the balance electrolyte, A system comprising a balancing apparatus comprising a reducing agent in or that can be introduced into the balancing electrolyte for reducing dioxovanadium ions. [2] The system according to [1], further comprising a second separator for separating the third half-cell from the fourth half-cell. [3] The system according to [1] or [2], further comprising a potential source connected to or connectable to the third and fourth electrodes, which generates a potential between the third and fourth electrodes. [4] an intermediate electrolyte containing any combination of a) V³⁺ and V²⁺ ions, or b) Fe³⁺ and Fe²⁺ ions , A fifth half-cell having a fifth electrode in contact with an intermediate electrolyte, A second separator between the third half-cell and the fifth half-cell, A sixth half-cell comprising a sixth electrode in contact with the intermediate electrolyte, A third separator between the fourth half-cell and the sixth half-cell, The system according to any one of the above items [1] to [3], further comprising: [5] The system according to [4], further comprising: a) the third electrode and the fifth electrode, which generate a potential between the third electrode and the fifth electrode; and b) a) at least one potential source connected to or connectable to the fourth electrode and the sixth electrode, which generates a potential between the fourth electrode and the sixth electrode. [6] The system according to any one of [1] to [5], wherein the third half-cell is in contact with the cathode liquid. [7] The system according to any one of the above [1] to [5], wherein the third half-cell is in contact with the anode liquid. [8] The system according to any one of the above items [1] to [7], wherein the reducing agent comprises an organic compound. [9] The system according to any one of the above items [1] to [8], wherein the reducing agent comprises a sugar, a carboxylic acid, an aldehyde, or an alcohol. [10] The system according to any one of the above [1] to [9], wherein the reducing agent comprises fructose, glucose, or sucrose. [11] The system according to any one of [1] to [10], wherein the system is configured to continue operating the balancing equipment while the oxidation-reduction flow battery system is in operation. [12] The system according to any one of [1] to [10], wherein the system is configured to operate the balancing equipment intermittently or periodically during the operation of the oxidation-reduction flow battery system. [13] The system according to any one of [1] to [12], wherein the system is configured to operate the balance equipment continuously, independently of the oxidation-reduction flow battery system. [14] The system according to any one of the above [1] to [12], wherein the balancing equipment and the oxidation-reduction flow battery system are integrated and utilize at least one common component. [15] The system according to any one of [1] to [14], wherein the anode solution has chromium ions in the solution. [16] The system according to any one of [1] to [15], wherein the cathode solution has iron ions in the solution. [17] A method for operating the system described in any one of the above paragraphs [1] to [16], wherein the method is In the aforementioned balanced electrolyte, the vanadium ions are oxidized to dioxovanadium ions to generate hydrogen ions, The process involves reducing the dioxovanadium ion using the reducing agent to regenerate the vanadium ion, Methods that include... [18] The method according to [17], wherein the regeneration of the vanadium ions includes adding the reducing agent to the balance tank of the balance equipment, and the balance tank contains a portion of the balance electrolyte. [19] The method according to [17] or [18], wherein the regeneration of the vanadium ions is performed by intermittently or periodically adding the reducing agent to the balance electrolyte. [20] Regenerating the vanadium ions is To remove at least a portion of the balance electrolyte fr