Special Research on Energy Storage of All Vanadium Flow Batteries: Wide Oce≤ans and Skies, Different "Vanadium" Sounds

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Company News

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2024-03-13 17:48

1. All vanadium flow battery: a promising form of long-term energy storage 1.1. All vanadium ↓flow battery is currently the most mature flow battery technology Liquid flow batt≤eries are an electrochemical energy storage technology with great  potential.

1. All vanadium flow battery: a promising form of lo∞ng-term energy storage

1.1. All vanadium flow battery is currently the most mature flow battery ¥technology

Liquid flow batteries are an electrochemical energy storage technology with great potenσtial. The concept of flow battery was first proposed by Japan₩ese scientists Ashimura and Miyake in 1971. In 1974, NASA scient↓ist L. H. Thaller constructed the world's first practical flow batt ery model using FeCl2 and CrCl3 as positive and negative active substances. Unlike typical soli¥d-state batteries, the positive and negative electrodes of a flow battery are storαed in an external storage tank in the form of an electrεolyte solution. The conversion of electrical and chemical energ↑y is achieved through reversible oxidation-reduction reactio↓ns of active substances in the positive and negative electrolyte solutions. Liquid flow batteries h ave relatively low energy density, but they have significant ad&vantages in terms of service life, charging and discharging depth, system capacity, etc.∑ Therefore, they are receiving increasing attention in the field of large-scale ene™rgy storage.

All vanadium flow battery is currently the most mature and industrialized flow battery techno≥logy. According to the different active substances in the electrodes, flow batteries can  be divided into various technical routes, among which representative systems ↑with commercial applications include all vanadium, iron chromium, zεinc bromide, etc. From the perspective of technological maturity, all vanadium flow→ batteries are currently in a leading position. They were first foun&ded by Professor Skyllas Kazacos and his team from the University of New South♦ Wales in Australia in 1985. Institutions such as Sumitomo Electric in♣ Japan, VRB in Canada, and Dalian Institute of Chemical Physics i&n China have been conducting industrial research since the 1990s. Currently, commercial pr ojects with a capacity of tens to hundreds of MWh have been put into op‌eration both domestically and internationally. Compared to other batte¥ries, iron chromium flow batteries suffer from issues such as hydrogen evolution reacti≠on and insufficient electrochemical activity of chromium εions, while zinc bromide batteries have relatively limited monomer capacity and are cur"rently in the engineering demonstration stage.

1.2. All vanadium flow batteries have advantages in safety, longevity, flexibility, an¶d other aspects

1.2.1. Security

Compared to lithium-ion batteries, all vanadium flow batteries have better safety.™ For lithium-ion batteries, once there is a short circu®it inside the battery or the working temperature is tδoo high, the electrolyte is prone to decomposition∏ and gasification, which can lead to battery combusσtion or explosion, causing great safety hazards. The electrolyte of all vanadium f₽low batteries is an acidic aqueous solution of vanadium ions✔, which operates at room temperature and pressure wi÷thout the risk of thermal runaway and has intrinsic safety. According to empirΩical results, at a theoretical 100% SOC, even if the positive and negative electrolytes are dire↔ctly mixed and the temperature rises from 32 ℃ to 70 ℃, the all vanadium flow ™battery system will not generate any risks of combustion or ignition. Th≈erefore, for energy storage scenarios with dense per≠sonnel, large scale, and high safety requirements, all vanadium flow batteries <are a safer and more reliable technology.

The higher safety of all vanadium flow batteries enables them to adopt a more compact layout, the↓reby reducing land occupation at the project level. Compared to lithium-ion batteries, all v<anadium