where 𝑘 𝑙,𝑒𝑓𝑓 is the effective Li + conductivity for liquid electroyte phase; R is the universal gas constant; T is the absolute temperature; f is the Li + salt activity coefficient; 𝑐 𝑙 is the Li + concentration within liquid electrolyte; 𝑡 + is the Li + transference number within liquid electrolyte.