Structural and Electrochemical Properties of Type VIII Ba₈Ga_16-δSn_30+δ Clathrate (δ ≈ 1) during Lithiation.

ABSTRACT: Clathrates of the tetrel (Tt = Si, Ge, Sn) elements are host-guest structures that can undergo Li alloying reactions with high capacities. However, little is known about how the cage structure affects the phase transformations that take place during lithiation. To further this understanding, the structural changes of the type VIII clathrate Ba₈Ga_16-δSn_30+δ (δ ≈ 1) during lithiation are investigated and compared to those in β-Sn with ex situ X-ray total scattering measurements and pair distribution function (PDF) analysis. The results show that the type VIII clathrate undergoes an alloying reaction to form Li-rich amorphous phases (Li_xBa_0.17Ga_0.33Sn_0.67, x = 2-3) with local structures similar t

SUBMITTER: Dopilka A 

PROVIDER: S-EPMC8447186 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature