In the last decade, substantial efforts have been devoted to the replacement of the carbonaceous anode material in Li ion batteries with alternatives that allow a high Li-storage capacity. In terms of energy capacity, Si is far ahead of other metals or metalloids, with over 3500 mA h g ร1 gravimetric capacity and around 8500 A h L ร1 volumetric capacity. However, the practical implementation of Si as an anode material is hampered dramatically by its poor cyclability resulting from the low intrinsic electric conductivity and the large volume change (>300%) due to the formation of various Li x Si y phases (e.g., Li 12 Si 7 , Li 7 Si 3 , Li 13 Si 4 , and Li 21 Si 5 ). Such processes can generate enormous mechanical stress within the material, leading to severe pulverization of the reactant particles and electrical disconnection from the current collector. To alleviate the so-called pulverization problem and to further enhance the structural stability, one effective strategy is to design specific nanocomposites (e.g., the inactive/active concept), preferably carbon-based materials that present the following advantages: i) preventing aggregation of silicon particles, ii) providing sufficient void space to buffer the large volume change, and iii) increasing the electrical conductivity. However, the rate performance using such electrode materials remained limited in the past due to their poor electrical conductivity as a consequence of the inefficiency of conducting phases (carbon layer) especially when cycling at very high rates. Therefore, conductive additives (e.g., Cu, Ag, etc.) were exploited by Kim and co-workers, who showed that Cu-deposited silicon powder exhibited improved cyclability resulting from the reduction of the charge-transfer resistance. Moreover, Yang et al. reported that the SiรAg based composite electrodes (90 wt% Si, 10 wt% Ag) manifested a reversible capacity of 800 mA h g ร1 over 30 cycles.