Figure 1

Schematic crystal structure of (a) α-CuGaO2, (b) β-CuGaO2, and (c) half-cell of spinel-CuGa2O4. The bigger spheres mean closer atoms. (d) Schematic route for experimental processes.

Schematic crystal structure of (a) α-CuGaO2, (b) β-CuGaO2, and (c) half-cell of spinel-CuGa2O4. The bigger spheres mean closer atoms. (d) Schematic route for experimental processes.