What’s the Difference Between Sodium-Ion and Lithium-Ion Batteries?

Different battery chemistries provide varying solutions depending on the application and its requirements. Lithium-ion and sodium-ion batteries operate similarly, but their performance, size, and material considerations may be better suited to certain uses than the other. We compare sodium-ion and lithium-ion batteries across a range of factors to help determine which option might provide the best solution for your application.

What is a Lithium-Ion Battery?

Lithium-ion batteries generate and store energy through the movement of lithium ions between electrodes. They are the dominant battery technology of today, offering high-capacity, long-lasting power with high energy density, fast charging, and low maintenance. Used across a wide range of applications, lithium-ion batteries are commonly found in phones, laptops, EVs, power tools, and medical devices, providing adaptable power for devices in various industries.

What is a Sodium-Ion Battery?

Sodium-ion batteries use sodium ions instead of lithium ions to transfer energy between electrodes. They operate similarly to lithium-ion batteries, storing and releasing energy through the movement of positively charged sodium ions. Gaining popularity for applications where cost stability, material availability, safety, and scalability are more important than maximum energy density, sodium-ion batteries offer advantages over lithium-ion varieties due to their non-flammable materials, faster charging capabilities, and better performance in low-temperature environments.

Sodium-Ion vs. Lithium-Ion Batteries

Sodium-Ion Batteries Lithium-Ion Batteries
Energy Density 120-175 Wh/kg 90-350 Wh/kg
Voltage 3.0-3.3V 3.6-3.9V
Charging Speed Reaches 80% in about 15-30 min 1 hour to 3 hours
Lifespan 2,000-5,000 cycles 500-3,000 cycles
Weight 10-30% heavier for the same capacity Typically lighter due to high energy density
Cost 10-30% more cost-effective Cost is driven by availability of lithium and cobalt/nickel content

The main difference between sodium-ion and lithium-ion batteries is the raw materials used and their availability. It is essential to consider supply chain requirements when choosing between these battery chemistries. In addition to being a more sustainable material option, sodium-ion batteries outperform lithium-ion batteries in extreme cold weather, retaining over 85% of their capacity at -40°C.

Pros and Cons of Lithium-Ion and Sodium-Ion Battery Chemistries

Each chemistry has its own pros and cons for viable battery solutions. Lithium-ion batteries offer a higher energy density and a long cycle and calendar life, delivering strong performance across a wide range of operating conditions. Their materials are less abundant and may incur higher costs due to market instability. Alternatively, sodium-ion batteries offer easier, safer transportation with a lower risk of fire, as well as improved supply chain reliability to ensure consistent product availability. They are well-suited to large-scale energy storage where cost and scalability are of the highest priority.

Depending on the requirements of your application, sodium-ion or lithium-ion batteries may provide greater advantages, but each chemistry will have its own trade-offs in other factors.

Best Use Cases of Lithium-Ion and Sodium-Ion Batteries

Both lithium-ion and sodium-ion batteries have recommended use cases based on their performance, including:

  • Phones, laptops, and wearables: Lithium-ion batteries are preferred due to their exceptional combination of high energy density and lightweight portability, allowing manufacturers to pack maximum battery life into slim designs without unnecessary bulk.
  • Electric vehicles: Either lithium-ion or sodium-ion can be used in electric vehicles; due to the increased weight of sodium-ion solutions, they are typically reserved for vehicles that don’t need a vast driving range. Lithium-ion batteries are the industry standard because they offer a longer driving range due to their higher energy density.
  • Renewable energy storage and backup power: Sodium-ion batteries are preferred for stationary renewable energy storage and backup power solutions, as they maintain lower costs, exceptional safety, and high sustainability. Their lower energy density is less of a factor.
  • Industrial and commercial equipment: Both battery chemistries perform in industrial and commercial equipment; it is more important to decide which solution fits the requirements based on performance vs. cost requirements.

Contact Apex Mobile Power About Battery Chemistries for Your Application

Apex Mobile Power (AMP) specializes in the engineering and manufacturing of custom battery solutions for a wide range of applications across industries. With capabilities for lithium-ion and sodium-ion battery chemistries, our experts can help create a battery that meets your exact design and performance requirements. Contact us to discuss your custom battery project or request a quote to get started.

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