Will the all-vanadium flow battery become a substitute for lithium batteries?

by:CTECHi     2021-08-17

In recent years, with the development of mobile phones and other electronic products and new energy vehicles, in the energy storage industry, lithium-ion batteries can be said to be very popular. However, whether it is the most common zinc-manganese battery or the rechargeable lithium battery in mobile phones, their development is still more or less restricted by factors such as higher cost, short life, and lower safety performance. However, in the energy storage industry, technical research on new materials to solve battery problems has never stopped. Flow batteries, lithium batteries, sodium-sulfur batteries, and lead-carbon batteries are currently the mainstream technologies for energy storage in power systems. Among them, the flow battery is a secondary battery technology in which the active material exists in the liquid electrolyte. The electrolyte is placed outside the stack and flows through the stack under the push of a circulating pump, and an electrochemical reaction occurs to realize the conversion of chemical energy and electric energy, so as to realize the storage and release of electric energy. The development of new energy has opened up a broad application market for energy storage. Flow battery has become the backbone of the energy storage field due to its unique technical advantages. Since the development of flow batteries, more than 100 projects have been implemented, with a cumulative installed capacity of approximately 40 megawatts. The application fields cover all aspects of power system generation, transmission, distribution and utilization. The development of flow battery has gone through from laboratory to enterprise, from prototype to standard product, from demonstration application to commercial promotion, from small to large, and from single to integrated function. It is currently in the initial stage of industrialization. There are many subdivisions of flow batteries according to the different electric pairs that react. Among them, the positive and negative active materials of all vanadium flow batteries are vanadium ions, but the valence is different, which is safer, longer life, and more efficient The advantage of is currently the most widely used battery type in the field of flow batteries. According to the '2017-2022 China All-vanadium Redox Flow Battery Market Research and Development Prospect Forecast Report' released by Xinsijie, in 2016, its cost will be approximately RMB 6,000 per kilowatt hour. It is predicted that by the end of 2020, its cost It can be reduced to about 2800 yuan per kilowatt-hour. All vanadium redox flow batteries are currently in production in some companies in Japan, the United States, and China, and are mainly used for energy storage, power station peak shaving, etc. The industry analysts of New Ideas believe that if the problems of energy storage, life and cost can be better solved, the application fields of flow batteries will be broader, not only limited to industry, new energy vehicles, household energy storage, and even mobile phones. Of consumer electronics devices have very broad application prospects.

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