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A technology of electrolyte solution and vanadium battery, applied in fuel cells, regenerative fuel cells, circuits, etc., to achieve the effects of widening the operating temperature range, simple preparation process, and improving solubility
Inactive Publication Date: 2018-02-02
杨昌恩
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Problems solved by technology
[0005] However, the solubility of the current vanadium battery electrolyte and the corrosion of battery components are still optimized.
Method used
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Embodiment 1
[0022] An electrolyte solution for a vanadium battery, comprising vanadium ions, sulfuric acid and an ionic liquid, the concentration of the vanadium ions is 1.6 mol / l; the ionic liquid additive is selected from inorganic molybdate, and the inorganic molybdate is selected from sodium molybdate.
Embodiment 2
[0024] A kind of vanadium battery electrolytic solution, comprises vanadium ion, sulfuric acid and ionic liquid composition, and the concentration of vanadium ion is 1.8mol / l; Wherein, ionic liquid additive selects the mixture of inorganic molybdate and oxalate, and its mass ratio is 1: 1.1; Wherein, inorganic molybdate is selected from the mixture of sodium molybdate, lithium molybdate, magnesium molybdate and calcium molybdate, and its mass ratio is 1:0.2:1.2.
[0025] Wherein, the oxalate is selected from a mixture of zinc oxalate, iron oxalate and calcium oxalate, and its mass ratio is 1:1.2:1.
Embodiment 3
[0027] An electrolyte solution for a vanadium battery, comprising vanadium ions, sulfuric acid and ionic liquid, the concentration of vanadium ions is 2mol / l; the ionic liquid additive is a mixture of inorganic molybdate and oxalate, and its mass ratio is 1:1.2.
[0028] Wherein, the inorganic molybdate is selected from a mixture of sodium molybdate, lithium molybdate, magnesium molybdate and calcium molybdate, and its mass ratio is 1:0.8:1.5.
[0029] Wherein, the oxalate is selected from a mixture of zinc oxalate, iron oxalate and calcium oxalate, and its mass ratio is 1:1.3:1.3.
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Abstract
The invention relates to the technical field of cell electrolyte, and in particular relates to a vanadium cell electrolyte. The vanadium cell electrolyte is characterized in that at least one of inorganic molybdate, phosphate and oxalate is selected as an ionic liquid additive, wherein the inorganic molybdate is selected from at least one of sodium molybdate, ammonium molybdate, potassium molybdate, magnesium molybdate, zinc molybdate, iron molybdate, manganese molybdate and calcium molybdate; oxalate is selected from at least one of sodium oxalate, ammonium oxalate, potassium oxalate, lithiumoxalate, magnesium oxalate, zinc oxalate, iron oxalate, manganese oxalate and calcium oxalate. According to the vanadium cell electrolyte, the additive is capable of increasing the dissolvability ofthe electrolyte, inhibiting the hydrolyzing of pentavalent vanadium ions, and greatly improving the stability of cathode electrolyzing; inorganic molybdate is treated as the cathode electrolyte additive through which the stability of the cathode electrolyte is improved, and the running temperature range of a vanadium cell is expanded. The vanadium cell electrolyte is simple in preparation processand operation, and low in cost; the vanadium cell can easily stably run under high temperature.
Description
technical field [0001] The invention relates to the technical field of battery electrolyte, in particular to a vanadium battery electrolyte. Background technique [0002] The all-vanadium redox flow battery has the advantages of high energy conversion efficiency, adjustable capacity, long service life, high safety and environmental friendliness. Peak-shaving and valley-filling device, uninterruptible power supply and emergency power supply system. [0003] In vanadium batteries, battery energy is stored in the form of electrolyte, which is composed of vanadium ions and sulfuric acid. The positive electrode is composed of VO2+ / VO2+ redox pairs, and the negative electrode is composed of V3+ / V2+ group redox pairs. Increasing the concentration of the electrolyte is an effective way to increase the specific energy of the battery. However, because vanadium has spare d orbitals, it is not only easy to combine with ligands, but also very easy to associate with vanadium atoms. The...
Claims
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Application Information
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