Non-circulating flow liquid flow battery
A flow battery and non-circulation technology, which is applied in the direction of fuel cells, fuel cell additives, regenerative fuel cells, etc., can solve the problem of low volume and weight specific energy of the battery system, large space occupation of the flow battery, and problems of the flow battery. To avoid problems such as application limitations, to avoid leakage loss, occupy a small space, and increase the volume specific energy density
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Embodiment 1
[0027] Example 1: All vanadium redox flow battery
[0028] The all-vanadium flow battery is one of the most mature flow batteries so far, and its electrode reaction is:
[0029] positive electrode:
[0030] negative electrode:
[0031] The battery response is:
[0032]
[0033] Theoretical voltage V=1.259V
[0034] The drainage plate 3 is made of impermeable graphite plate, the bipolar plate 4 is made of carbon-plastic composite plate, the positive electrode electrolyte frame 5 and the negative electrode electrolyte frame 6 are made of plastic, and the diaphragm 7 is made of proton exchange membrane. When preparing the electrolyte, first in the H 2 SO 4 Prepare VOSO in solution 4 solution, and then electrolyzed so that the solution V 2 (SO4) 3 with VOSO 4 Each accounted for 50%, injected into the positive electrode electrolyte chamber 10 and the negative electrode electrolyte chamber 11 respectively, and the battery can be charged and discharged. The electroly...
Embodiment 2
[0036] Example 2: Zinc-iron flow battery
[0037] Zinc-iron batteries are an improved system of chromium-iron batteries. The chromium-iron battery is the first liquid flow battery system, but the oxidation-reduction reaction of chromium is difficult and requires expensive catalysts; and the charging reaction of the negative electrode is a large amount of hydrogen evolution. Replacing the chromium anode with a zinc anode can solve these two problems, and the voltage of the battery will increase significantly, so the specific energy of the battery will also increase, and its charge and discharge reactions are as follows:
[0038] positive electrode:
[0039] negative electrode:
[0040] The battery response is: E=1.53V
[0041] In the discharge state, the active component of the positive electrode is FeSO 4 , the active component of the negative electrode is ZnSO 4 , add 0.1~2mol / L of H in the positive electrode electrolyte chamber 10 2 SO 4 ; Add 0.1~2mol / L (NH 4 ) ...
Embodiment 3
[0046] Example 3: Zinc-manganese flow battery
[0047] Zinc-manganese battery is one of the earliest invented and most widely used batteries. It was generally used in the field of dry batteries or storage batteries in the past. Since the positive electrode active material MnO 2 Under basic to slightly acidic conditions, the reduction products are all inert Mn 2 o 3 , so it cannot be recharged or is difficult to recharge. In addition, the potential of this reaction is low, and the number of electrons transferred is also small, which limits the specific energy of the battery. The invention adopts strong acid sulfuric acid as the electrolyte, and the discharge product is completely dissolved in water, so the charging operation can be carried out. The electrode reaction is:
[0048] positive electrode:
[0049] negative electrode:
[0050] The battery reacts as follows:
[0051]
[0052] The theoretical battery voltage V = 1.993V, which is basically equivalent to th...
PUM
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Abstract
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