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A tin-iron alkaline flow battery

An alkaline liquid and flow battery technology, applied in alkaline electrolytes, fuel cells, aqueous electrolytes, etc., can solve the problems of low electromotive force, poor safety, low specific energy, etc., to eliminate dendrite problems, improve safety, low cost effect

Active Publication Date: 2021-10-08
YANCHENG INST OF TECH
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  • Description
  • Claims
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Problems solved by technology

[0008] Purpose of the invention: Aiming at the problems of low electromotive force of acidic tin-iron flow battery and poor safety of alkaline zinc-iron flow battery, and the low specific energy of the two, the present invention proposes a new type of alkaline tin-iron flow battery

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  • A tin-iron alkaline flow battery

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Embodiment Construction

[0019] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] A kind of tin-iron alkaline flow battery of the present invention, such as figure 1 As shown, it includes diaphragm 1, positive electrode porous electrode 2, negative electrode porous electrode 3, bipolar plate 4, positive electrode electrolyte and liquid storage tank 5, negative electrode electrolyte and liquid storage tank 6, circulation pump 7 and necessary sealing and fastening devices . The battery uses an alkaline electrolyte solution, and the active material Fe of the positive electrode and the active material Sn of the negative electrode are stored in an alkaline medium; the positive porous electrode 2 and the negative electrode porous electrode 3 are separated by the separator 1, and the bipolar plate 4 is placed On the outside of the positive and negative porous electrodes; the active material stored in the p...

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Abstract

The invention discloses a tin-iron alkaline liquid flow battery, which is suitable for large-scale energy storage. The battery includes a diaphragm, a porous electrode, a bipolar plate, positive and negative electrode liquids and liquid storage tanks, a circulation pump and a sealing and fastening device, and an alkaline electrolyte solution is used, and the active material Fe of the positive electrode and the active material Sn of the negative electrode are stored in the alkali In the neutral medium, the active material stored in the positive and negative liquid storage tanks is pumped into the battery through the circulation pump, flows through the porous electrode, and an electrochemical reaction occurs on the electrode surface. The positive active material is Fe(CN) 6 4‑ / Fe(CN) 6 3‑ , the negative electrode active material is [Sn(OH) 6 ] 2‑ / Sn, HSnO 2 ‑ / Sn or [Sn(OH) 6‑ ] 2‑ / HSnO 2 ‑ . Aiming at the problems of low electromotive force of acidic tin-iron flow battery and poor safety of alkaline zinc-iron flow battery, as well as the low specific energy of the two, the present invention doubles the specific capacity of negative electrode volume while maintaining a high electromotive force , and avoid the use of dendrite-prone zinc electrodes, the dendrite problem is eliminated, and the safety of the battery is improved.

Description

technical field [0001] The invention relates to the field of flow batteries, in particular to a novel tin-iron alkaline flow battery, which is suitable for the field of large-scale energy storage. Background technique [0002] Liquid flow battery is an electrochemical energy storage device, which was first proposed by Thaller in 1974. Since the energy is stored in the electrolyte, the power and capacity are independent of each other, and it has the advantages of flexible design, high safety, long life cycle, high cost performance, Environmentally friendly and other advantages, it has outstanding advantages in the field of large-scale energy storage. [0003] In 1982, D-G.Oei proposed to use SnCl2 as the negative electrode active material of the flow battery, V 2 o 5 As the positive active material of the flow battery, but due to the V 2 o 5 The solubility in acidic solution is small, and the specific energy of the battery is severely limited. At the same time, the stand...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0014Y02E60/50
Inventor 陈晖陈富于许剑光吕萌吴赛雪杨丹
Owner YANCHENG INST OF TECH
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