Intercalation-type Li-free cathodes for all solid-state batteries
Shanghai, China (SPX) May 16, 2023 - The development of intercalation-type Li-free transition-metal-based cathodes and Li-metal anode paired all-solid-state batteries appears a viable alternative to overcome the energy density limitations faced by current rechargeable Li-ion technology.
What are Intercalation-type Li-free Cathodes?
Intercalation-type Li-free cathodes are a type of cathode used in all-solid-state batteries. These cathodes are composed of transition metals such as iron, cobalt, and nickel, which are known for their high energy density and stability. Because these materials are not as reactive as lithium, they can be used in an all-solid-state battery without the risk of short-circuiting.
Advantages of Intercalation-type Li-free Cathodes
Intercalation-type Li-free cathodes offer several advantages over traditional Li-ion batteries. First, they are more stable than Li-ion batteries, as they do not suffer from the same degradation issues. This means they can last longer and provide more consistent power output. Second, they are also lighter than Li-ion batteries, making them more suitable for portable applications. Finally, they are more energy efficient than Li-ion batteries, meaning they can store more energy for a given weight.
Limitations of Intercalation-type Li-free Cathodes
Despite the advantages of intercalation-type Li-free cathodes, there are some limitations. One of the main issues is their low rate capability. This means they cannot provide the same level of power output as Li-ion batteries. Additionally, they are more expensive to produce and require more complex manufacturing processes. Finally, their energy density is still lower than that of Li-ion batteries.
The development of intercalation-type Li-free transition-metal-based cathodes and Li-metal anode paired all-solid-state batteries appears a viable alternative to overcome the energy density limitations faced by current rechargeable Li-ion technology. Besides, it is noteworthy that the rate-determining process that limits the power density of all-solid-state batteries is no longer in electrochemical reactions, but in the diffusion of ions in the solid electrolyte. Thus, further research is needed to improve the ionic conductivity of solid electrolytes to increase the power density of all-solid-state batteries.
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