In spite of some technical advances in mitigating the volume-change problem toward the practical application of Si anodes, several challenges are still remained and should be resolved. First, the development of noble surface-coating methods and stable electrolytes for reducing the side reactions should be considered to stabilize the SEI of the Si anode. Although reducing methods of the HF derived from fluoroethylene carbonate (FEC), which is widely used in Si anodes to stabilize the SEI layer, is required because substantial capacity fading occurs as the HF attacks both the cathodes and Si. Second, in order to apply the Si anode to commercial LIBs and to achieve a high energy density, the change in the electrode thickness after tens of cycles should be examined in calendared Si anodes having an electrode density greater than 1.6 g   cc^-1, as an industrial standard. Based upon these requirements, I presents the best anode material, along with the real full cell test results.