What is lithium ion conductivity?

Various lithium-ion conducting materials have been developed as key materials for practical applications of solid-state lithium batteries. The highest conductivity among sulfide-based electrolytes reaches 10 –2 S cm –1, (1,2) which is comparable to that of liquid electrolytes.

What ionic conductivity is needed for Li-ion batteries?

While various material systems have been explored and tested as replacements, most do not display a sufficient ionic conductivity to be utilized in Li-ion batteries; a room temperature conductivity of at least 10 −3 S cm −1 is needed for an electrolyte to function well in consumer battery systems .

How do we predict lithium ion conductivity at room temperature?

We develop supervised regression and classification models to predict the lithium ion conductivity and assess whether a material will possess an ionic conductivity log 10 (σ) ≥ 4 at room temperature, where the conductivity is reported in units of S cm –1.

Can lithium salts improve ion conductivity?

To mitigate this problem, researchers have added lithium salts or ionic liquid into MOFs or COF to improve ion conductivity. Although ionic conductivity can be improved in this way, it redcues the lithium-ion transference number even down to ∼0.2.

How does Li ion transport affect the conductivity of solid-state batteries?

Li-ion transport through the interface between the electrolyte and the electrodes affects the overall conductivity of solid-state batteries and the chemical stability of the interface. “Point-to-point” ion diffusion may occur at the interface due to poor interfacial contact.

What is the ionic conductivity of solid-state Li-ion electrolytes?

The ultimate goal is to have the ionic conductivity of SSEs reach 10 −3 –10 −2 S cm −1 at room temperature, which is comparable to that of liquid electrolytes. Table 1. Comparison of different solid-state Li-ion electrolytes Current solid polymer electrolytes are developed mainly based on the segment motion mechanism.