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Thermal Management of Lithium-ion Batteries
Lithium-ion Battery (LIB) is established as the most prominent modern energy storage device because of its high energy density, rechargeability and long cycle life. But LIB works particularly in specific environment such as in temperature range between 15 to 40 degrees Celsius. Colder environment creates a lot of issues like increased internal resistance, dendrite growth, electrolyte freezing etc. On the other hand, hotter environment causes reduced capacity, increased safety risk and accelerated degradations. Also, battery itself generates a lot of heat during its operation of both charging and discharging.
Hence, Thermal Management is a very crucial part of designing Battery Packs for Modern EVs. Current industry standard for thermal management is indirect liquid cooling, Ongoing research is also going on with air cooling and Phase Change Materials (PCM).
Work in progress...
Sodium-ion Batteries
Sodium-ion Batteries
Energy storage devices will play a huge role in the upcoming days specially if we want to increase renewable energy usage. Lithium-ion batteries are already established as go to battery. But due to materials shortages, high cost, geopolitical issue with rare earth materials, safety issue we need to find an alternative to the Li-ion battery. Sodium-ion battery is the best possible candidate in this scenario. Sodium is one of the most abundant materials across the world, and recently there is a spark of interest among the scientific community with the battery. But we need to address some certain issue if we want to establish sodium-ion battery as an alternative to lithium-ion battery. The main challenge is the energy density compared to the lithium-ion batteries and catching up with industry use technology.
Anode free battery comes right at this place. As there is no anode materials, the battery has now less weight for the capacity, as a result energy density increases. Bare current collector is used and sodium plates on the current collector in the initial cycle which acts as an anode. One more noteworthy thing is, Sodium does not alloy with aluminum. So, we can use Aluminum as a current collector which is cheaper than other metal current collectors.
Recently, CATL has launched their newest sodium-ion battery named NAXTRA. This could be the beginning of a new era of sodium-ion batteries.
Work in progress...
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