Complex Hydrides with (BH4)~- and (NH2)~- Anions as New Lithium Fast-Ion Conductors

摘要

We have studied lithium ion conductivities of complex hydrides Li_2(BH_4)(NH_2) and Li4(BH4)(NH2)3, both with combinations of the (BH4)- and (NH2)- anions. Ac impedance measurements demonstrate that both Li2(BH4)(NH2) and Li_4(BH_4)(NH_2)_3 are novel lithium fast-ion conductors (2x10~(-4) S/cm at room temperature) due to being provided new occupation sites for Li~+ ions.