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Redox-flow battery and method of operating thereof

A liquid flow battery and battery technology, applied in fuel cells, fuel cell additives, regenerative fuel cells, etc., can solve problems such as difficulty in maintaining frequency and voltage, troublesome power system operation, etc., and achieve the effect of reducing differences

Active Publication Date: 2013-01-02
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the output of these power generation is affected by the weather, it can be predicted that large-scale introduction will cause troubles to the operation of the power system such as difficulty in maintaining frequency and voltage

Method used

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  • Redox-flow battery and method of operating thereof
  • Redox-flow battery and method of operating thereof
  • Redox-flow battery and method of operating thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0051] >

[0052] refer to figure 1 and 2 A general description will be given of a redox flow battery (hereinafter referred to as an RF battery) containing Mn ions as a positive electrode active material and Ti ions as a negative electrode active material. exist figure 1 In , the solid arrows represent charging, and the dashed arrows represent discharging. figure 1 Metal ions are shown in their representative forms and may include forms other than those shown. For example, although figure 1 Show Ti 4+ As tetravalent titanium ion, but may include other forms such as TiO 2+ .

[0053] Such as figure 1 As shown in , the RF battery 1 is typically connected to a generating unit (such as a solar photovoltaic generator, a wind generator, or a general power plant) and to a load such as a power system or a consumer through an AC / DC converter, using The power generation unit charges it as a power supply source and discharges it to supply power to the load. Like a conventional ...

Embodiment approach 2

[0071] In Embodiment 2, refer to image 3 , the RF battery 2 including other features in addition to the configuration in Embodiment 1 will be described. image 3 is a simplified diagram showing only how the conduits are connected.

[0072] >

[0073] In addition to the structure of the RF battery in Embodiment 1, the RF battery 2 in Embodiment 2 further includes a gas-phase communication pipe 13 , a liquid-phase communication pipe 14 , a positive-side introduction conduit 15 , and a positive-side supply mechanism 16 .

[0074] [Gas phase connecting pipe]

[0075] The gas phase communication pipe 13 is a conduit that communicates the gas phase of the positive electrode tank 106 with the gas phase of the negative electrode tank 107 . By providing the gas-phase communication pipe 13 , oxygen generated by side reactions on the positive electrode side accompanying charge and discharge can be introduced into the negative electrode tank 107 . Preferably, the gas-phase communicat...

experiment example 1

[0087] Manufactured with reference to image 3 RF battery 2 having a structure similar to that of Embodiment 2 described above. As the positive electrode electrolyte and the negative electrode electrolyte, sulfuric acid with a concentration of 2M mixed therein, MnSO with a concentration of 1M are used. 4 (Mn 2+ ) and TiOSO with 1M concentration 4 (Ti 4+ ) electrolyte. Tanks 106 and 107 were respectively filled with 3 L of positive electrode electrolyte solution and 3 L of negative electrode electrolyte solution in an airtight manner from the outside air. To inhibit oxidation, the gas phase is partially filled with nitrogen. As the battery element 100, a 500 cm 2 electrode area of ​​a single cell. The liquid phase communication pipe 14 and the gas phase communication pipe 13 are kept closed.

[0088] A charge-discharge test was performed on this experimentally produced Ti / Mn-based RF battery 2 . Initial performance is 99% current efficiency, 1.5Ωcm 2 The single cell r...

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Abstract

Provided is a redox-flow battery (1) that executes charging / discharging by supplying, into a battery element (100), a positive-electrode electrolytic solution stored in a positive-electrode tank (106), and a negative-electrode electrolytic solution stored in a negative-electrode tank (107), wherein the positive-electrode electrolytic solution of the redox-flow battery (1) comprises MN ion as a positive-electrode active material, and the negative-electrode electrolytic solution thereof comprises at least one of the Ti, V, and Cr ions as a negative-electrode active material. The redox-flow battery (1) is provided with: a negative-electrode side introduction piping (10) that is interconnected from the outside to the inside of the negative-electrode tank (107), and that is for introducing oxidizing gas into the negative-electrode tank (107); and a supplying mechanism (11) for supplying the oxidizing gas into the negative-electrode tank (107) via the negative-electrode side introduction piping (10).

Description

technical field [0001] The present invention relates to redox flow batteries and methods of operation thereof. More particularly, the present invention relates to redox flow batteries capable of generating high electromotive force. Background technique [0002] As a means of counteracting global warming, the introduction of new energy sources such as solar photovoltaic power generation and wind power generation has been promoted all over the world in recent years. Since the output of these power generation is affected by the weather, it is predicted that large-scale introduction will cause troubles such as difficulty in maintaining frequency and voltage to the operation of the power system. As a means of solving such a problem, it is desirable to install a large-capacity storage battery to smooth output changes, store surplus power, and to balance loads. [0003] A redox flow battery is a large-capacity battery. In a redox flow battery, a positive electrode electrolyte so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18H01M8/04
CPCH01M8/04798H01M8/20H01M8/04447Y02E60/528H01M8/04082H01M8/04H01M8/188H01M8/18H01M8/04089H01M8/04753H01M8/04761H01M8/04805Y02E60/50
Inventor 董雍容重松敏夫隈元贵浩
Owner SUMITOMO ELECTRIC IND LTD
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