The positive and negative electrolytes of all vanadium redox batteries (VRB) use a single multivalent element-vanadium, which makes that the electrolyte properties can't be affected by the mutual penetration of the positive and negative electrolytes during use, so that the battery has a longer life.
The vanadium electrolyte SY-1.5M has a unique formula, high conductivity, large operating temperature range, no heat exchanger, good stability, less vanadium ion migration and small liquid level changes during charging and discharging. We solve the problem of positive and negative electrolytes. We have also solved the problem of energy attenuation. Our electrolyte is the best choice for vanadium batteries.
The potential diagram of vanadium in acid medium is as follows:
The electronic configuration of vanadium is 3d34s2, and its chemical properties are very active. The electrolyte used in VRFB is a sulfuric acid solution of vanadium ions, but the ion valence states of the two battery halves are different under different charge states.
Positive half-cell: a sulfuric acid solution with a discharge state of V (IV) and a sulfuric acid solution with a charge state of V (V);
Negative half-cell: a sulfuric acid solution with a discharge state of V(II) and a sulfuric acid solution with a charge state of V(II).
Technical Specifications of Vanadium electrolyte:
Concentration |
1.5M |
Density |
1.3 g/cm3 |
Energy Density |
20 kWh/m3 |
Specific Energy |
15 kWh/t |
Charge Voltage Max. |
1.64 VDC/Cell |
Discharge Voltage Max. |
1.0 VDC/Cell |
Working Temperature |
-30—60 ℃ |
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