AdvancedTopic 100 of 100Materials & Chemical
Solid-state batteries
Replace liquid electrolyte with solid conductors for higher safety and energy density.
In depth
Solid electrolytes (sulfide, oxide, polymer) replace flammable liquids, enabling lithium-metal anodes, higher energy density (potentially >400 Wh/kg) and improved safety. Challenges: interfacial resistance, dendrites, manufacturing cost and cycle life under pressure. Pilot production is underway.
Key points
- Ionic conductivity target ≥1 mS/cm
- Interface engineering
- Stack pressure
ExampleAutomakers are testing solid-state packs for longer-range electric cars.
What is Solid-state batteries?
Replace liquid electrolyte with solid conductors for higher safety and energy density.
Why is it important to understand solid-state batteries?
Solid-state batteries promise higher safety and energy density by replacing the liquid electrolyte with a solid conductor, which is an active area of materials research.
What is a solid electrolyte?
A solid material that conducts ions while blocking electrons, so it can separate the electrodes in a battery.
What are the main challenges of solid-state batteries?
Ion conductivity at room temperature, contact resistance at interfaces, and manufacturing cost and scale remain key challenges.
How is Solid-state batteries used in practice?
Typical applications include developing a solid electrolyte for an electric car battery with less fire risk, designing a thin-film battery for a small medical device and comparing the energy density of a solid-state cell with a conventional lithium-ion cell.
What should I learn before Solid-state batteries?
Study "Metal additive manufacturing metallurgy" first (topic 99 of 100 in Materials & Chemical). It covers the groundwork this topic builds on.
What are the key points of Solid-state batteries?
Ionic conductivity target ≥1 mS/cm. Interface engineering. Stack pressure.
Can you give an example of Solid-state batteries?
Automakers are testing solid-state packs for longer-range electric cars.
What comes after Solid-state batteries?
This is the final topic in Materials & Chemical.
How difficult is Solid-state batteries?
It is classed as Advanced in Materials & Chemical (topic 100 of 100). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Materials & Chemical.