Table 2. Calculated surfaces energies, interaction energy between lithium and different facets of CuO.

	CuO
Surface	d-spacing, dhkl/Å	Surface energy/J m−2	Interaction energy/J m−2
001	5.038	4.23	1.88
010	3.41	1.04	8.47
100	4.589	1.73	6.05
011	2.824	1.22	5.42
101	3.144	2.51	3.42
110	2.737	2.69	3.43