Due to a high theoretical capacity and an excellent Li+/e- conductivity, the worldwide available metals such as Tin and Aluminum anticipates attractive applications in energy storage. Unfortunately the battery performance is limited because of the pulverization and oxidation. In order to prevent these, here we present a metal nano-composite, which is constructed by a pure metal nanoparticle and a “breathing” thin shell with a flexible interspace, using an in situ chemical redox.  This new configuration can effectively avoid the loss of pulverized active material while providing a fast pathway for Li+/e- transport. In parallel, the controllable void inside can accommodate the large volume expansion to ensure a sufficient adhesion to the shell, leading to a high cyclability and an excellent rate capability. The current facile, low-cost approach to metal nano-composite will open an avenue in next-generation Li-ion batteries in replacing graphite anode electrode.