▎ 摘　　要

The superconducting phase in graphene can be induced by doping its surface with lithium atoms. In this paper, it is shown that the critical temperature (T-C) for the LiC6 and Li2C6 compounds changes from 8.55 K to 21.83 K. The other thermodynamic parameters-the order parameter (Delta), the specific heat for the superconducting (C-S) and the normal (C-N) state and the thermodynamic critical field (H-C)-differ from the predictions of the Bardeen-Cooper- Schrieffer theory. In particular, the ratio R-Delta equivalent to 2 Delta(0)/k(B)T(C) is equal to [3.72] (LiC6) and [4.21] Li2C6. Additionally, the quantities R-C equivalent to Delta C(T-C)/C-N(T-C) and R-H equivalent to TCCN(T-C)C-N H-C(2)(0) take the values [1.47] (LiC6), [1.79](Li2C6) and [0.167](LiC6), [0.144](Li2C6). Finally, it is shown that the electron effective mass at T-C is high and equals: [1.61me] (LiC6) and [2.12m(e)] (Li2C6).