Reversible specific capacity in charge percentages between different cycles.

Sample	Specific capacity 1st discharge (mA h g−1)	Specific capacity 1st charge (mA h g−1)	Coulombic efficiency 1st cycle (%)	Coulombic efficiency 2nd cycle (%)	Coulombic efficiency 100th cycle (%)	2nd cycle/1st cycle (%)	50th cycle/2nd cycle (%)	100th cycle/2nd cycle (%)
Si_40	1081	817	75.64	96.21	99.34	99.3	79.9	68.2
Si_40C	997	766	76.82	95.48	99.27	97.8	86.4	78.3
Si_75	982	775	78.90	96.61	99.45	99.4	80.1	70.0
Si_75C	937	764	81.44	97.06	99.56	99.6	87.5	79.6
Si_75C_118M	1120	892	79.63	95.47	99.50	99.6	84.8	75.4
Si_75C_250M	914	699	76.50	94.98	99.50	99.6	95.7	91.0