The charge diffusion coefficient, in contrast to the tracer diffusion coefficient, exhibits a direct proportionality to the ionic conductivity. The literature commonly denotes the ratio between the tracer and charge diffusion coefficients as the Haven ratio H r = Dtr Dσ . The reduction of the effective degrees of freedom due to the cooperativity of the Li ions exhibits a direct correlation with the Haven ratio, a widely recognized metric for elucidating the cooperative phenomena observed in ion conductors pertaining to ion dynamics. The examination of the inequality 40 yielded valuable empirical knowledge regarding the distinction between the tracer and charge diffusion coefficients, resulting in hints for finding materials where the carrier-carrier interaction is long-ranged.