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Titanyl sulfate hydrate powder, method for producing titanyl sulfate hydrate powder, method for producing aqueous titanyl sulfate solution, method of producing electrolyte solution, and method for producing redox flow battery

A technology of titanyl sulfate hydrate and its manufacturing method, which is applied to titanium compounds, fuel cells, electrochemical generators, etc.

Active Publication Date: 2021-05-14
TAYCA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the description in Patent Document 1, the energy density per unit volume can be increased by increasing the concentration of metal ions in the positive electrode active material. However, when a high concentration of manganese ions is used, it is considered that there is MnO that precipitates as a solid during charging and discharging. 2 The problem

Method used

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  • Titanyl sulfate hydrate powder, method for producing titanyl sulfate hydrate powder, method for producing aqueous titanyl sulfate solution, method of producing electrolyte solution, and method for producing redox flow battery
  • Titanyl sulfate hydrate powder, method for producing titanyl sulfate hydrate powder, method for producing aqueous titanyl sulfate solution, method of producing electrolyte solution, and method for producing redox flow battery
  • Titanyl sulfate hydrate powder, method for producing titanyl sulfate hydrate powder, method for producing aqueous titanyl sulfate solution, method of producing electrolyte solution, and method for producing redox flow battery

Examples

Experimental program
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Effect test

Embodiment 1

[0085] Hydrous titanium oxide containing niobium element is used as a starting material and dissolved in sulfuric acid to obtain a titanium sulfate solution. Add water and sulfuric acid to the obtained titanium sulfate solution, adjust the amount of each component, and obtain titanium element containing TiO 2 Converted to 110g / L, containing sulfur element as H 2 SO 4 It is 850 g / L in conversion, and the solution containing the niobium element of the molar ratio (Nb / Ti) of the niobium element and the titanium element becomes 0.0010. The mass ratio at this time (H 2 SO 4 / TiO 2 ) was 7.7, and the molar ratio (S / Ti) of sulfur element content relative to titanium element content was 6.3. The obtained titanium sulfate solution was put into a glass beaker and heated from room temperature to 70° C. over 10 minutes while stirring using a stirrer having a Teflon-finished stirring blade. During heating, when the temperature reaches 50° C., titanyl sulfate dihydrate crystals are ad...

Embodiment 2

[0088] In Example 1, except for the conditions of heating the titanium sulfate solution, the same operation was performed to obtain titanyl sulfate hydrate powder. The specific heating conditions are as follows. While continuing to stir the aqueous solution, it was heated from room temperature to 50° C. over 10 minutes. When 50°C was reached, seeds were added. Then, the temperature was raised to 70° C. over 10 minutes while continuing stirring, and the temperature was maintained at 70° C. for 4 hours, and then the heating was stopped and cooled. Table 1 shows the production conditions. In addition, Table 2 shows the results obtained by evaluating the obtained titanyl sulfate hydrate powder in the same manner as in Example 1.

Embodiment 3

[0090] In Example 1, TiO was obtained 2 Concentration is 90g / L, sulfuric acid concentration is 700g / L, H 2 SO 4 / TiO 2 Except that the titanium sulfate solution having a mass ratio of 7.8 and an S / Ti molar ratio of 6.3 was used to precipitate crystals, the same operation was performed to obtain titanyl sulfate hydrate powder. Table 1 shows the production conditions. In addition, Table 2 shows the results obtained by evaluating the obtained titanyl sulfate hydrate powder in the same manner as in Example 1.

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Abstract

According to the present invention, a titanyl sulfate hydrate powder is characterized by containing 25-40% by mass of titanium element in terms of TiO2, 40-60% by mass of sulfur element in terms of H2SO4, and niobium element in such an amount that the molar ratio of niobium element to titanium element (Nb / Ti) is from 0.00005 to 0.012, with the molar ratio of the sulfur element content to the titanium element content (S / Ti) being from 1.1 to 1.5, and is also characterized by containing a crystal of titanyl sulfate dihydrate (TiOSO4*2H2O). Consequently, the present invention is able to provide: a titanyl sulfate hydrate powder which has high rate of dissolution into water; a method for producing this titanyl sulfate hydrate powder; and a method for producing an aqueous titanyl sulfate solution, a method for producing an electrolyte solution and a method for producing a redox flow battery, each of which uses this titanyl sulfate hydrate powder.

Description

technical field [0001] The invention relates to a titanium oxysulfate hydrate powder and a manufacturing method thereof. Furthermore, it relates to the manufacturing method of the titanyl sulfate aqueous solution using this titanyl sulfate hydrate powder, the manufacturing method of an electrolytic solution, and the manufacturing method of a redox flow battery. Background technique [0002] In recent years, various secondary batteries have been put into practical use, and they are used in various applications such as mobile phones, hybrid vehicles, and electric vehicles, taking advantage of their high charge-discharge voltage and high charge-discharge capacity. [0003] Secondary batteries using an aqueous electrolyte are suitable for large-capacity storage batteries requiring high safety because they have no problems of expansion and combustion due to heating, such as lithium-ion batteries, and are excellent in safety. Among them, a redox flow battery, which is a secondary...

Claims

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Application Information

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IPC IPC(8): C01G23/00H01M8/18
CPCY02E60/50C01G23/008C01P2002/52C01P2002/72C01P2002/74C01P2004/03C01P2006/40C01P2004/54C01P2004/61H01M8/188Y02E60/10
Inventor 福田淳鹤村达也加来宏一巽辽多
Owner TAYCA CORP
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