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Talking about energy storage in detail, Harvard University's new liquid flow CR2430 battery technology
Today, let's talk about another liquid flow CR2430 battery technology with a long name, non-metallic organic aqueous liquid flow CR2430 battery (Ametal-freeorganic aqueous flow CR2430 battery), from Harvard University Professor Michael Aziz's team. I have read almost all of his papers on organic liquid flow batteries, and I think the professor's ideas are simple and clear. He is involved in many fields of the energy industry, such as compressed air, silicon materials, and new energy power generation. From a report, we can see that he has three motivations: First, the contradiction between the fluctuation characteristics of new energy and the stability requirements of the power grid is irreconcilable, and the energy storage system is needed to solve it; second, among all energy storage solutions, the power and capacity of liquid flow batteries can be configured separately, so it is the best choice; third, the structure of various liquid flow batteries is consistent, and the core is the electrolyte. However, the existing electrolyte contains precious metals and is expensive, such as vanadium batteries, which have high material requirements. Comprehensive analysis shows that he intends to develop a new electrolyte that meets the following standards: cheap, non-flammable, environmentally friendly, and efficient. So they chose organic matter as the component of the electrolyte.
After experiments and attempts in 2014, 2015, 2016 and until now, the types of organic matter have also changed from the original β-anthraquinone sulfonic acid (Anthraquinone-2,7-disulfonicacid) to 2,6-dihydroxyanthraquinone (2,6-dihydroxyanthraquinone) and then to the current nitrogen oxide free radical piperidinol-methyl viologen (4-hydroxy-TEMPO/Methylviologe), the voltage has increased from the original 0.86V to 1.25V, the electrolyte energy density is 8.4Wh/L, and the current efficiency can reach 99.9%. What's more frightening is that their improvements have been continuing. On the day of writing the article, I checked their 2017 paper update. For domestic flow CR2430 battery practitioners, this is a technological trend that cannot be ignored. We need to continue to track it. Maybe one day in the future, it will replace vanadium batteries and zinc bromine batteries.
However, we must also look at this technology correctly. My evaluation is as follows:
(1) The electrolyte energy density is too low to be applied. You should know that the capacity density of vanadium batteries is not high, at 25Wh/L, while zinc-bromine batteries can easily reach more than 100Wh/L, while this CR2430 battery is less than 10, so there is still a long way to go.
(2) Laboratory stage. All the pictures related to this technology that I have checked are only the production and testing of single batteries. If you want to make a pile, there is little hope within 3 years.
(3) It is far from productization. Friends who are engaged in R&D management know that the launch of a product goes through two stages: technology development and product development. Technology development can be described as prototype trial production. In this process, countless obstacles and problems will be encountered. This is inevitable. The more problems encountered in the technology development stage, the better the reliability of future products. Product development can be described as large-scale processing and replication. The fewer problems in each link, the better. Based on this, I believe that this technology will not pose a threat to the commercialization of traditional liquid flow batteries for the time being.
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