As the "reserve army" of long-term energy storage technology, flow battery has developed rapidly in recent years and has become a "upstart" in the market.
The flow battery can run stably at -20℃ for 100 hours.
According to the China Journal of Science, it was recently learned from the Institute of Metals of Chinese Academy of Sciences (hereinafter referred to as "Institute of Metals") that researchers Li Ying and Tang Wei led the team to make new progress in the research field of new low-cost iron-based flow battery energy storage technology. Related research results have been published in Chemical Engineering Journal and Small respectively.
By etching the metal at the electrode interface, the researchers of the Institute of Metals effectively regulated the nucleation characteristics of iron ions at the electrode interface, and revealed the enhancement mechanism of hybridization of iron ions at carbon defects and the evolution law of iron deposition process by theoretical calculation and simulation analysis. On this basis, the assembled all-iron flow battery achieved a power density of 80 milliwatts per square centimeter and a current efficiency of 99% after 250 cycles, and the cycle stability was effectively improved by 10 times.
The results show that the optimal design of electrode interface can effectively improve the performance of iron anode, which provides a new way to realize the efficient and stable operation of all-iron flow battery. In addition, by introducing polar solvent into the solution, the researchers of Metal Research Institute realized the stable operation of the whole battery for 100 hours at the low temperature of -20℃ for the first time. The research results laid a technical foundation for the industrial development and application promotion of all-iron flow battery technology in wide temperature range.
Future growth rate of flow battery can be expected.
As the "reserve army" of long-term energy storage technology, flow battery has developed rapidly in recent years and has become a "upstart" in the market. According to the different kinds of active electricity in positive and negative electrodes and electrolyte solution, flow batteries can be divided into zinc-iron flow batteries, zinc-bromine flow batteries, all-iron flow batteries, iron-chromium flow batteries, all-vanadium flow batteries and so on. Among them, with the development of upstream and downstream industries, vanadium batteries have taken the lead in entering the initial stage of commercialization.
According to China Energy News, Zhou Xiang, Marketing Director of Xingchen New Energy, once said that all-vanadium flow battery is one of the new energy storage routes with the most advanced comprehensive technical indicators, the most advanced industrialization and the most encouraged national policies. It is estimated that by 2030, the permeability of all-vanadium flow battery in new energy storage will exceed 30%.
At present, the common energy storage methods in the industry generally have the defects of short energy storage time, poor safety and high cost of electricity, which is not conducive to supporting the application and promotion of new energy. Flow battery has the characteristics of intrinsic safety, ultra-low cost and long-term energy storage, and it has come to the Giva era and stood in front of the window of industrialization.
According to the report of Toubao Research Institute, from 2018 to 2021, the compound annual growth rate of the flow battery market scale is 55.2%, and the market scale will reach 1.06 billion yuan in 2022. It is expected to reach 24.89 billion yuan in 2027, and the compound annual growth rate of the market scale may reach 87.9% from 2022 to 2027.
The rolling price-earnings ratio of 13 concept stocks is less than 20 times.
In the A-share market, there are nearly 30 listed companies with businesses related to flow batteries, and some companies have made rapid progress. Yongtai energy revealed on the interactive platform that the company’s Detai Energy Storage 1000MW All-Vanadium Flow Battery Energy Storage Equipment Manufacturing Base (Phase I 300MW) started construction as scheduled at the end of June 2023. At present, the company is promoting the construction of the workshop and production line of the Phase I 300MW new generation large-capacity vanadium battery project in an orderly manner, and it is expected to be put into production in the second half of this year.
At present, Lushan new materials are being tested, certified and introduced as bonding materials for hydrogen fuel cells and flow batteries.
Shanghai Electric has successfully developed 5kW/25kW/32kW/65kW series stacks, and delivered more than 50 energy storage projects of flow batteries.
The energy storage power station with electric investment includes three energy storage modes, namely, iron-chromium liquid flow battery energy storage, liquid-cooled lithium battery energy storage and flywheel energy storage, with iron-chromium liquid flow technology. The 1MW Fe-Cr flow battery project under construction by the company has been tested for single charge and discharge, and has not been put into actual commercial operation. It is a pilot project of the company.
Fengshan Quannuo, a holding subsidiary of Fengshan Group, has carried out research and development layout and technical reserve in the electrolyte of vanadium battery flow, which is currently in the pilot stage.
Judging from the performance of the secondary market, as of the close of April 3, the concept stocks of flow batteries have fallen by 1.22% on average this year. Western mining, power investment and energy, Longbai Group, Yulong and Fengshan Group have a strong trend, with a cumulative increase of over 10% during the year. Since March, according to the average transaction price of the interval, there are four companies that have increased their holdings in the north by more than 100 million yuan, namely Shanghai Electric, Western Mining, Longbai Group and Dongfang Electric.
Among these concept stocks, 13 stocks have a rolling P/E ratio of less than 20 times, including Power Investment Energy, Zhenhua, Hyde, Dongfang Electric and Anning. The rolling P/E ratio of power investment energy is 9.25 times, ranking the lowest.
[Editor: Li Yangzi]
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