What Is a Solid State Battery and How Are They Useful?

Lithium-ion battery technology has profoundly transformed our world by making it possible to store energy reliably and for extended periods of time away from the grid. The lithium-ion battery still has room for improvement despite these developments. The creation of a solid-state battery is one breakthrough that has the potential to alter how we store energy once again.

Batteries that employ solid-state technology appear to be the next big thing, and we’ll soon be seeing goods that make use of these batteries. It would help if you learned more about what they are and why they’re crucial right now. Picking the very best house generator for power failures includes evaluating the 4 different kinds readily available.

What Does It Mean When You Talk About a “Solid State”?

A liquid electrolyte is used in all types of batteries, whether lead-acid automobile batteries, alkaline disposable batteries, or lithium polymer batteries in smartphones. The electrolyte is a conductive liquid that links the battery’s two internal terminals. Electrons travel through the electrolyte, enabling the battery to accumulate or discharge an electrical charge.

Rather than a liquid electrolyte, a solid-state battery employs a solid electrolyte. That is the primary distinction between the two rechargeable batteries. While this may seem straightforward, scientists and engineers have been trying for decades to develop a solid substance capable of acting as an electrolyte.

What Makes Solid State Batteries Challenging?

Numerous materials, including lithium metals and ceramics, have shown promise as solid-state electrolytes. The issue is that using ceramics has resulted in subpar battery performance. While lithium metals are intriguing, they suffer from a fatal defect. Metal “dendrites” develop through the electrolyte when the battery is charged and drained. The battery may experience a short circuit and become a danger.

Several firms and research groups have been tasked to develop realistic and economically feasible solutions to these difficulties during the last several years. Now, their efforts are going to bear fruit.

What’s the point of putting themselves through this? Let’s look at the advantages of solid-state batteries over regular ones.

Recharge Speed

While modern lithium-ion batteries charge quickly, they still take some time to recharge. There is a limit to the amount of energy that can be pumped into a conventional lithium-ion battery before it explodes. Solid-state batteries have the potential to charge up to six times quicker than conventional batteries. This equates to charging your phone from zero to full in 5 minutes or charging an electric automobile to 80% capacity in fifteen minutes.


Batteries contain a lot of energy, and there is always the possibility that this energy may be discharged in an uncontrolled manner. It may result in fires, explosions, and other undesirable consequences when this occurs. If the dendrite problem is remedied, solid-state batteries promise to be safer and more secure. They are non-flammable, which means that battery fires should become a thing of the past.

Energy Capacity and Size

At the moment, lithium-ion batteries have the most significant energy density of any battery type commercially available. Despite this, it is several times denser than gasoline. Although solid-state batteries cannot yet match gas batteries’ energy density, they promise to more than double energy density per volume.

Weaknesses of Solid-State Batteries

If this all seems too good to be true, the technology does come with a few drawbacks. Several of these issues remain unresolved before the broad implementation of solid-state battery technology.

  • Perhaps the biggest adversary is cost. Researchers and startup firms have collaborated to make solid state battery development a more cost-effective and scalable manufacturing technique. Some businesses claim to be close, but we won’t know for certain until we see real costs for items equipped with these batteries.
  • Additionally, these batteries suffer in cold weather. As a result, solutions including their insulation or maintaining a safe operating temperature are part of the difficulty.


There will be significant advantages in weight and size compared to the current lithium-ion battery technology. However, the allure of solid-state batteries is self-evident, and their potential may persuade manufacturers to keep their production commitments in check. The design of electric cars has already caught up to or perhaps surpassed that of its gasoline-powered equivalents.

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