A preliminary investigation of fracture toughness of Li7La3Zr2O12 and its comparison to other solid Li-ion conductors

作者：Wolfenstine Jeff; Jo Hyungyung; Cho Yong Hun; David Isabel N; Askeland Per; Case Eldon D; Kim Hyunjoong; Choe Heeman; Sakamoto Jeff^*

来源：Materials Letters, 2013, 96: 117-120.

DOI：10.1016/j.matlet.2013.01.021

• Batteries
• Solid state electrolyte

This is the first report of fracture toughness analysis of a new ceramic electrolyte (Li7La3Zr2O12). The fracture toughness was measured using an indentation technique and subsurface crack propagation was analyzed using a novel focused ion beam/scanning electron microscope (FIB-SEM) technique. The fracture toughness of polycrystalline Li7La3Zr2O12 was between 0.86-1.63 MPa root m. FIB-SEM analysis of the indentation cracks suggested that both half-penny and Palmquist cracks were present. The fracture toughness of Li7La3Zr2O12 is comparable to other state of the art ceramic electrolytes such as Li0.33La0.57TiO3 and Li1.3Al0.3Ti1.7(PO4)(3).

• 出版日期2013-4-1