<p>A new fact, that calcining a mixture consisting of the commercial microsilica (SiO₂) and basic copper carbonate (Cu₂(OH)₂CO₃) in air can greatly increase the battery behavior of the commercial microsilica, is firstly presented in this work. The samples, prepared using the mixture with an atomic ratio of Si in the commercial microsilica (SiO₂) to Cu in basic copper carbonate (Cu₂(OH)₂CO₃) 3:1, 5:1, and 7:1, are designated as sample a, b, and c, respectively. For comparison, the commercial microsilica was denoted as sample o. The presence of both CuO and SiO₂ in all synthesized samples is effectively indicated by the X-rays diffraction (XRD) and X-rays photoelectron spectroscopy (XPS) measurement results. Most important of all, the battery behaviors of all synthesized samples are much better than that of the commercial microsilica (SiO₂), for example, the discharge capacities of sample a, b, and c at 1.0&#xa0;A g^− 1 after 500 cycles are 30.5, 36.4, and 27.2 mAh g^− 1, respectively, being almost 2.2, 2.6, and 1.9 times that of the commercial microsilica SiO₂ (13.8 mAh g^− 1). The enlarged CV peak area and the lowered <i>R</i>_ct value are analyzed to be the main reasons endowing all prepared samples an excellent battery behavior relative to that of the commercial microsilica (SiO₂).</p>