Carbon-Coated\nCoaxial Cable-like ZnO@SiO<sub>2</sub>@C for High-Performance Lithium-Ion\nBattery Anode Materials

The practical applications of SiO<sub>2</sub> anode material\nare\nlimited by large volume changes and poor electronic conductivity.\nTo reduce the effects of these problems, a carbon-coated coaxial cable-like\nZnO@SiO<sub>2</sub>@C composite material was prepared. ZnO has a certian\nelectronic conductivity and an electrochemical activity, and the carbon\nlayer can alleviate the volume variation of SiO<sub>2</sub>, effectively\nimproving the electronic conductivity and structural stability. At\nthe same time, the carbon layer acts as a barrier to prevent direct\ncontact between SiO<sub>2</sub> and the electrolyte, thus promoting\nthe formation of stable solid electrolyte interface films. Carbon-coated\ncoaxial cable-like ZnO@SiO<sub>2</sub>@C exhibits excellent electrochemical\nproperties, with a discharge specific capacity of 480.3 mAh g<sup>–1</sup> after 500 cycles at a current density of 1 A g<sup>–1</sup>. The carbon-coated coaxial cable-like structure presents\na potential application for alloying anode materials.