Basic Chemistries of Sodium and Lithium
Every science student and chemical engineer know the position of lithium and sodium in the periodic table of elements. Lithium is just below hydrogen, and sodium is immediately below lithium. Lithium is the ideal material for batteries because it is the lightest of all materials and has the greatest electrochemical potential. This allows it to store immense amounts of energy in a very small, lightweight package, making it the perfect power source for modern electronics and electric vehicles.
Several key properties make Lithium superior to other battery materials, as follows:
- High energy density: Lithium batteries can store significantly more power per unit of weight and volume than traditional lead-acid or nickel-cadmium alternatives.
- Highly reactive element: It easily releases and accepts electrons, which facilitates a high electrical power output.
- Rechargeability: Lithium ion moves effortlessly back and worth between battery’s anode and cathode. This allows the battery to be charged and discharged thousands of times without significant capacity loss.
- Low self-discharge: Lithium batteries hold their charge much longer when not in use compared to other rechargeable batteries.
Sodium is emerging as a cheaper, safer, and highly sustainable alternative for stationary grid storage and affordable electric vehicles, as sodium materials are more abundant and inexpensive.
A direct look at the core differences reveals how they perform across key metrics.
| Feature | Lithium-ion | Sodium-ion |
| Energy density | High (200 to 300 Wh/kg) | Lower (120 to 170 Wh/kg) |
| Raw materials | Scarce; relies on copper, cobalt, and nickel | Abundant; uses cheaper aluminum |
| Safety | Flammable; medium risk of thermal runaway | Non-flammable; very low risk of thermal runaway |
| Cold weather | Loses capacity and efficiency at freezing temperature | Excels in extreme, sub-zero temperatures |
| Lifecycle | Very high (8,000 to 10,000 cycles for LFP) | Moderate (3,000 to 6,000 cycles |
| Cost | More expensive due to limited supply chain | Significantly cheaper to produce |
Notes:
Physics limit sodium: Lithium ions are smaller and lighter, allowing lithium-ion cells to pack significantly more power into the same size and weight. This makes lithium the top choice for smartphones, laptops, and long-range electric vehicles.
Sodium’s structural edge: Sodium is roughly 1,000 times more abundant than lithium, as it can be easily extracted from common sources like seawater and salt. Sodium-ion batteries are also easier to recycle and can be safely shipped at zero volts, making them vastly safer during transport and disposal.
Manufacturing and adoption: While lithium-ion has a mature, decades-old supply chain, major manufacturers are actively scaling sodium-ion technology.
Sources: Various references.
A Chinese firm has successfully developed sodium-ion battery
It is reported by Prabhat Ranjan Mishra in interestingengineering.com on May 28th, 2026, that a new type of sodium-ion battery, developed in China, is now matching the performance parameters and production quality of lithium-ion batteries. It is developed by a company HiNa Battery Technology Co. Ltd. (HiNa Battery), based in the Science and Technology Industrial Park, Liyang, Jiangsu Province, China. The battery’s high-power capability, and strong low-temperature performance makes these cells attractive for stationary storage. Its website is hinabattery.com/en/.
Once the new battery is further improved to charge more effectively at low temperatures and function better at high energy densities, it could provide a cost-effective alternative for future electric vehicle batteries that depends on sodium.
“The combination of good uniformity, high power capability and strong low-temperature performance makes these cells attractive for stationary storage, grid services, and shorter-range or commercial vehicles where potential lower cost and resource availability matter more than maximum driving range,” says Moritz Schutte, a battery scientist at RWTH Aachen University in Germany.
To assess how HiNa batteries compare to more advanced lithium batteries, Schutte’s team used a non-destructive technique called impedance spectroscopy to measure the uniformity of 120 sodium-ion battery cells. Next, to map out the power and energy performance of individual cells under real-life conditions, the team tested the batteries at varying current and temperatures from -200C to 450C . They also used X-rays to see the battery’s internal structure, then opened up the cells to measure their electrode dimensions, compositions, and microstructures.
It was also found that the battery uses a tabless, double-aluminum current collector design that reduces resistance and ensures a uniform temperature distribution-and also mirrors the current design of lithium batteries.
“We were positively surprised how uniform the cells are. The high-power performance was better than one might expect from an early commercial sodium-ion battery. However, for applications that require frequent charging at low ambient temperatures, appropriate thermal management or operating categories will be important because low-temperature charging remains a clear weakness,” said Schutte.
Researchers also found unexpectedly high, unevenly distributed levels of copper in certain cathode regions of the battery.
Future sodium-ion technologies
“It raises interesting questions about its role in performance and aging,” said Schutte. “it will be exciting to see future sodium-ion technologies that are free of nickel and copper, as well, while achieving competitive energy density.”
Since sodium is much more abundant and widely available than lithium, using it for batteries could reduce raw matarial costs for manufacturers and reduce long-term supply chain risks. Sodium-ion batteries also perform well under load at low temperatures, making them an attractive option for both stationary power storage and mobile applications in cold countries