Sodium batteries: The technology of the future?
Sodium batteries: The technology of the future?
The battery sector is bustling with innovation. Research into increasingly efficient and higher performance technologies that can bring added value to the market never stops.
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The last few years has seen a renewed interest in sodium-ion batteries, largely because of the economic benefits they yield.
Our electrification experts Marco Righi, Alan Pastorelli and Daniele Invernizzi discussed it during episode 20 of Battery Weekly , our weekly programme on the world of batteries, delving deep into the significant upward trend that sodium batteries are witnessing and what&#;s holding back their deployment on a large scale.
Sodium-ion batteries are definitely growing in popularity in the fields of energy storage and electric mobility. However, these batteries still suffer from a number limitations that need to be resolved before they can be marketed for a large range of applications.
Let&#;s find out together what sodium batteries are and their characteristics.
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Can sodium-ion batteries replace lithium-ion ones? - ING Think
Sodium-ion batteries unveiled by Swedish group Northvolt last month completely avoid the need for critical minerals such as lithium. This is currently the only viable battery chemistry that does not contain lithium.
Sodium is one of the most abundant and geographically spread resources on Earth, and is found in rock salts and brines around the world. It is cheaper and more abundant than lithium, making it less susceptible to resource availability issues and to price volatility. This could also reduce dependence on China during the green energy transition.
Northvolt&#;s battery has a hard carbon anode and high-sodium Prussian White cathode. Prussian White is produced from readily available raw materials, including sodium and iron. The Northvolt group will be the first to market a battery made up of these materials. The battery is more cost-effective and sustainable than conventional batteries made of nickel, manganese, cobalt or iron phosphate. Northvolt has noted that replacing graphite with hard carbon will reduce the battery's carbon footprint. Its battery has a significantly lower carbon footprint - at 10-20 kg of CO2 per kWh, compared to the 100-150 kg of CO2 per kWh associated with current comparable batteries.
The sodium-ion batteries are also non-flammable and, being safer than alternatives at higher temperatures, could be especially attractive for energy storage in markets such as India, the Middle East and Africa. Northvolt&#;s batteries will be able to withstand up to three times as much heat exposure as lithium batteries.
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