Among the leading companies in solid-state battery energy density, Solid Power and Samsung SDI stand out based on the latest available data.
- Solid Power has demonstrated solid-state batteries with up to 930 Wh/L volumetric energy density and about 500 Wh/kg gravimetric energy density in full-scale cells (up to 100 Ah capacity). This represents a 50-75% increase in energy density compared to the best conventional lithium-ion batteries currently available. Solid Power uses a proprietary sulfide solid electrolyte enabling safer and more stable batteries. Their technology is being validated through partnerships with automotive leaders like SK Innovation, aiming at scalable production.
- Samsung SDI is targeting an energy density of 900 Wh/L, which is roughly 40% higher than its current prismatic lithium-ion batteries. Samsung has launched a large pilot production line (‘S-Line’) and plans mass production by 2027, focusing initially on premium EVs. Their advancements include proprietary solid electrolytes and anode-less technologies to enhance both performance and safety.
Other notable mentions include:
- LG Energy Solution, which is advancing solid-state pouch-type batteries with improved durability and fast charging but has not publicly announced specific energy densities as high as Solid Power or Samsung.
- Nissan, aiming to double the energy density of conventional lithium-ion batteries with their solid-state technology projected around 2025, but specific energy density figures are not detailed.
- QuantumScape is a major player in solid-state battery innovation, promising significant improvements in energy density and charging speed, but exact current energy density figures are not specified in the available data.
Summary Table of Energy Density Leaders in Solid-State Batteries
| Company | Reported Volumetric Energy Density (Wh/L) | Key Notes |
|---|---|---|
| Solid Power | ~930 Wh/L | 50-75% more than conventional Li-ion; validated with SK Innovation |
| Samsung SDI | ~900 Wh/L | 40% higher than current prismatic Li-ion; pilot line started, mass production by 2027 |
| LG Energy Solution | Not explicitly stated | Focused on pouch-type solid-state batteries, durability improvements |
| Nissan | Targeting ~2x conventional Li-ion (unnamed) | Aiming for 2025 completion of first cells |
| QuantumScape | Not explicitly stated | Promises improvements, no exact figure publicly available |
Conclusion:
Currently, Solid Power leads in publicly demonstrated energy density for solid-state batteries at around 930 Wh/L, slightly exceeding Samsung SDI’s target of 900 Wh/L. These two companies are the forefront competitors with validated or near-commercial technologies pushing energy density beyond 900 Wh/L, placing them as leaders in the field as of early 2025.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/which-company-is-leading-in-terms-of-energy-density-for-solid-state-batteries/
