Silicon-Encapsulated Hollow Carbon Nanofiber Networks as Binder-Free Anodes for Lithium Ion Battery

Table 1

The physical and electrochemical properties of different hollow Si/C composite nanostructures.

Sample	Si content (%)	SSA^a (m^2 g^−1)	Theoretical capacity (mAh g^−1)	1st cycle reversible capacity (mAh g^−1)	1st cycle CE^b (%)	50th cycle reversible capacity (mAh g^−1)
H-Si/C-1	17.3	177.3	1181	913	48	567
H-Si/C-3	13.0	273.7	1025	841	58	745
H-Si/C-5	9.3	332.8	889	626	50	652
H-Si/C-10	8.0	274.8	842	579	54	493

aSpecific surface area (SSA) was calculated by the Brunauer-Emmett-Teller (BET) method.
^bThe columbic efficiency (CE).