Sodium-ion vs. Lithium-ion Battery: Which is the Better Alternative?
Sodium is more than 500 times more abundant than lithium, which is available in only a few countries. Sodium-ion batteries charge faster than lithium-ion variants and have a three times higher lifecycle. However, sodium-ion batteries lack a well-established raw material supply chain, and the technology is still in the early stages of development.
Read More: Future of Sodium-Ion BatteriesÂ
Industrial Applications of Sodium-Ion BatteriesÂ
Lithium is the most common element in battery manufacturing, with China controlling the global lithium-ion battery supply chain (79% of all lithium-ion batteries). China also controls 61% of global lithium refining capacity used for battery storage and electric cars.
The next big supplier is Argentina, accounting for 21% of global deposits, giving it tremendous power in raw material mining and the ability to influence the lithium supply chain, with 13 proposed projects and dozens more in the works.
Lithium-ion batteries are made from scarce and pricey elements such as cobalt and lithium. Lithium prices have surged more than 700% since 2021 amid rising demand for batteries. Lithium-based batteries would also struggle to meet the increasing demand for power grid energy storage. Technology companies are actively seeking alternatives to replace traditional lithium-ion batteries.
Sodium-ion vs. Lithium-ion Battery Technology
Sodium-ion batteries are a promising alternative to lithium-ion batteries — the most widely used type of rechargeable battery. Both types of batteries use a liquid electrolyte to store and transfer electrical energy but differ in the type of ions they use.
An examination of Lithium-ion (Li-ion) and Sodium-ion (Na-ion) battery components reveals that the nature of the cathode material is the main difference between the two. While the cost of preparing the cathode from raw materials is similar for both battery technologies, the main cost reduction for sodium-ion batteries comes from the raw materials themselves.
Due to the multiple advantages of sodium-ion batteries, large players in the energy industry are investing in acquiring and developing this technology. For example, Faradion, a UK-based battery technology company and innovator in Na-ion battery technology, was recently acquired by Reliance New Energy Solar, a subsidiary of Reliance Industries, for $135 million.
| Aspect | Sodium-ion Batteries | Lithium-ion Batteries |
|---|---|---|
| Raw Material Abundance | Sodium is abundant and widely available, leading to potentially lower costs and reduced supply chain risks. | Lithium is less abundant, with supply concentrated in specific regions, leading to potential supply chain vulnerabilities. |
| Energy Density | Lower energy density (75–200 Wh/kg), resulting in larger and heavier batteries for the same capacity. | Higher energy density (120–260 Wh/kg), enabling more compact and lightweight designs. |
| Cost | Generally lower due to the abundance of sodium and simpler manufacturing processes. | Higher costs driven by lithium scarcity and complex production requirements. |
| Safety | Lower risk of overheating and thermal runaway, enhancing safety profiles. | Higher risk of thermal runaway, necessitating robust management systems. |
| Cycle Life | Comparable cycle life, with ongoing research aimed at improvements. | Generally high cycle life, varying by chemistry and usage conditions. |
| Environmental Impact | More environmentally friendly, with easier recycling processes and less harmful extraction methods. | Environmental concerns due to lithium mining and complex recycling processes. |
| Commercial Availability | Emerging technology with limited but growing commercial availability. | Widely available and utilized across various applications. |
| Performance in Cold Temperatures | Better performance in low-temperature environments. | Performance can degrade in cold temperatures. |
Recent Developments:
- CATL’s AB Battery Pack Solution: Contemporary Amperex Technology Co. Ltd. (CATL) is developing a solution that combines sodium-ion and lithium-ion batteries into one pack, aiming to leverage the strengths of both technologies.
- Natron Energy’s Expansion: Natron Energy plans to establish a $1.4 billion sodium-ion battery factory in North Carolina, significantly increasing production capacity and impacting the U.S. battery market.
- Next Thing Technologies’ Safer Chemistry Innovations: Next Thing Technologies has developed advanced sodium-ion battery chemistries that prioritize safety, cost-effectiveness, and environmental sustainability. Their batteries utilize non-toxic, earth-abundant materials, significantly reducing the risk of thermal runaway compared to lithium-ion batteries.
- Market Projections: The International Energy Agency (IEA) predicts that sodium-ion batteries could account for 10% of global energy storage additions by 2030, indicating a growing role in the energy storage sector.
Challenges for Sodium-ion Battery
Despite their advantages, sodium-ion battery manufacturing faces several challenges before it can be widely adopted as a replacement for lithium-ion batteries:
- Lack of a Well-Established Supply Chain:
The materials used in sodium-ion batteries are not as widely available as lithium-ion counterparts, and the supply chain for these materials is still developing. - Early Stages of Technology:
The technology behind sodium-ion batteries is still in its infancy, and very few companies are operating in this segment, leading to higher battery production costs. - Limited Flexibility:
Sodium-ion batteries cannot be turned into various shapes (e.g., prismatic, cylindrical), limiting their applications. - Lower Density and Storage Capacity:
Sodium-ion batteries are less dense and have lower storage capacities compared to lithium-ion batteries, making them less suitable for applications requiring high energy density. - Cycle Life:
Existing sodium-ion batteries have a cycle life of 5,000 cycles, which is significantly lower than the cycle life of commercial lithium iron phosphate batteries, which can last 8,000-10,000 cycles.
Can Sodium-based Batteries Replace Lithium-ion Batteries?
While there are many potential advantages to using sodium-ion batteries over lithium-ion batteries, several challenges must be overcome before they can replace lithium-ion batteries on a large scale.
To become a dominant force in the energy storage industry, sodium-ion batteries must improve in technical performance. Researchers are actively working to enhance the stability, energy density, and cost-effectiveness of sodium-ion technology. Additionally, efforts are underway to establish a stable supply chain for the raw materials needed for these batteries.
Sodium-ion batteries may not be ready to completely replace lithium-ion batteries in all applications just yet, but their potential for large-scale, cost-effective, and sustainable energy storage solutions positions them as a strong contender for the future.
Market Outlook and Adoption
- The future of sodium-based batteries is bright, but it’s not without its uncertainties.
- By 2030, it’s estimated that sodium battery facilities could have a significant manufacturing capacity, but it’s projected that only a little over half of this capacity will be utilized for cell production.
- China is leading the charge in the development of sodium batteries, recognizing their potential as a key player in the future of electric vehicles.
Conclusion
- Sodium-ion batteries are a promising alternative to lithium-ion batteries, with advantages in cost, safety, and sustainability.
- While lithium-ion batteries still dominate the market, sodium-ion batteries are gaining traction and may eventually surpass them in certain applications.
- As the demand for energy storage continues to grow, sodium-ion batteries are likely to play a significant role in the future of electric vehicles and renewable energy storage.
AIA
President
Washington, DC