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Vanadium redox batteries are less apt than other battery technologies to be used in high-performance electric vehicles, they are better suited as a workhorse for grid-scale energy storage.
With emerging green energy technologies, the main question is: Where will all the energy be stored? Vanadium may be the answer to that question. Vanadium’s most popular oxide, vanadium pentoxide is a crucial element in the manufacturing of vanadium redox batteries, which can store vast amounts of energy.
While vanadium redox batteries are less apt than other battery technologies to be used in high-performance electric vehicles, however, they are better suited as a workhorse for grid-scale energy storage. The extremely large capacities possible from vanadium redox batteries make them well suited to use in large power applications such as helping to average out the production of highly variable generation sources such as wind or solar power, or to help generators cope with large surges in demand. The limited self-discharge characteristics of vanadium redox batteries make them useful in applications where the batteries must be stored for long periods of time with little maintenance while maintaining a ready state.
“It hasn’t really caught on yet, but there have been installations around the world of different sizes though it hasn’t yet cracked the big megawatt barrier in terms of regular implementation,” said Paul Casey, Business Director at American Vanadium Corp. (TSXV:AVC).
There have also been recent technological advancements in the technology that is helping to improve its economic viability.
“These advancements just help it make more economic sense – it reduces some of the costs, gives it a wider range of applications and so forth,” said Casey.
The global availability of vanadium also makes it appealing as more and more countries opt for renewable power sources and require storage units to optimize their efficiency.
“Fortunately, vanadium is not going to be a security of supply issue. It comes from a variety of different places, however, you still need to develop these sources and have the vanadium supply in place for what we anticipate to be a massive scaling up of demand for these inputs as wind and solar become a key part of our electricity foundation,” said Kaiser.
There are several other minerals that are particularly sought after in the emerging battery market, but because of many factors ranging from supply security to current technological limitations no particular material is yet to dominate the market.
The importance of battery technology
Batteries are poised as one of the most prominent technologies of the near future, particularly with emerging markets in electric vehicles and renewable energies. Manufacturing these batteries requires an input of minerals, and everyone from extractors to downstream technology producers are vying to invest in battery technologies that will be affordable, available and efficient. Cobalt is emerging as an efficient mineral in battery technologies with a variety of applications, though limited supply sources and listing as a “critical metal” are limiting their widespread adoption, though there have been many improvements in recycling processes.
“Batteries are probably the most important science frontier right now,” said John Kaiser, founder of Kaiser Bottom Fish, speaking at the Critical Metals Investment Symposium in Vancouver, BC. “The electrification of the car industry is another major new trend that has to happen simply because peak oil is a reality and we cannot depend on just oil imported from other parts of the world that are potentially unstable.”
There are several ideal performance qualities for most batteries, depending on the application, but some of the most desirable traits are a fast charge rate – especially for electric vehicles – the amount of charge a battery can hold, and how fast it can discharge energy.
Charge rate is important because it determines how quickly a battery can be charged. Battery density – how much volume and how much weight is required – is again ideal for high-performance applications like electric vehicles, but also extends into large grid-scale electricity storage.