Chemistry & Cell Components

Chemistry & Cell Components

Sodium Ion | Technology

Sodium Ion | Technology

Na-ion batteries, an alternative to Li-ion technology, operate on the same reversible cation intercalation 'rocking-chair' principle.

Despite lower energy density and slower reaction kinetics, attributed to factors like Na's higher redox potential (−2.71 V vs. SHE for Na+/Na), and larger size (1.02 Å) compared to Li (with a redox potential of −3.01 V, and 0.76 Å ionic radius)., Na-ion batteries offer advantages.

They are inert to aluminum, enabling its use as an anode current collector, and exhibit smooth Na intercalation with various 3d transition metals.

Potentially suitable for stationary storage applications where cost-effectiveness and longevity are critical, Na-ion batteries capitalize on the abundance of sodium, faster charging capabilities, and a broader temperature range.

Positioned as a potential solution for grid electricity storage, ongoing research aims to achieve a lower levelized cost of stored energy (LCOSE), targeting <$0.1/kWh, Na-ion batteries emerge as an affordable and secure alternative to Li-ion for stationary storage applications, being an abundant and low cost technology.

Source: Polyanionic Cathode materials for Sodium ion batteries, Dissertation from Mr. Huang Zhang (KIT)

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