Sodium-Ion Batteries: A Potential Game Changer for the EV Market

When Milwaukee Tools debuted the first rechargeable Lithium-Ion battery in the 1990s, it proved a legitimately game-changing advancement that dramatically reduced the need for gasoline to power many consumer devices. These days, the technology is used as the primary energy source for everything from power tools to mobile phones and tablets. It is, of course, likewise being used to power most of the electric vehicles (EVs) on the road today.

Until recently, Lithium-Ion looked to be the power source of choice in the EV sector for the foreseeable future. But that may no longer be the case, as rechargeable Sodium-Ion technology is experiencing a resurgence. Even as Sodium-ion power packs were first being developed around the same time as their Lithium-Ion counterparts, Lithium-Ion’s rapid adoption effectively relegated Sodium-Ion tech to the sidelines.

With demand for Lithium-Ion batteries skyrocketing and supply chains increasingly strained, some companies have turned to Sodium-Ion as a viable alternative. For Chinese automaker Changan, it has proven more than viable, with the company using Sodium-Ion tech to power its new Nevo A06 EV and claiming its battery dramatically outperforms Lithium-Ion power packs in cold weather charging. The company that developed those same batteries claims they last more than six times longer than the industry average, potentially signaling a shift in the EV market.

What to Understand About Sodium-Ion EV Batteries

There are several pros and cons to consider with Sodium-Ion battery tech. One key advantage could potentially doom Lithium-Ion batteries, as Sodium-Ion batteries are generally believed to be cheaper to manufacture. Some studies suggest Sodium-Ion production may undercut its counterpart by 20 to 40 percent, largely because Sodium is more abundant in nature and likely easier to mine.

Beyond cost, Sodium-Ion batteries are also believed to be safer than Lithium-Ion models. They exhibit superior thermal stability, meaning they are less likely to enter thermal runaway and catch fire. This gives Sodium-Ion batteries a major advantage in shipping, as they can be shipped at zero charge, greatly reducing the risk of fire during transport. Sodium-Ion batteries are believed to perform better when physically damaged or overcharged – common concerns with Lithium-Ion power sources.

If there’s one area where Lithium-Ion still holds a notable advantage in automobiles, it’s in energy density, which translates to better mileage per charge. According to Changan, its A06 tops out at around 250 miles, which doesn’t significantly improve upon most Lithium-Ion batteries and even falls short of some.

Still, given the potential advantages provided by Sodium-Ion batteries, it may not be long before they become the standard in the EV sector.