Single-walled carbon nanotube (SWCNT) wrapped GeO₂/ZnWO₄ nanocomposite was prepared by single-step solvothermal method. In this work, GeO₂/ZnWO₄ nanocomposites were prepared by varying the molar percentage of GeO₂ and by further adding SWCNT for the composite to boost the electrochemical performance. The prepared GeO₂/ZnWO₄ nanocomposites and GeO₂/ZnWO₄@CNT nanocomposite are used as anode material for lithium-ion battery (LIB). As expected, GeO₂/ZnWO₄@CNT nanocomposite exhibits higher capacities and good rate capability than the GeO₂/ZnWO₄ nanocomposite. The GeO₂/ZnWO₄@CNT nanocomposite exhibits 930 mAh g⁻¹ discharge capacity and 533 mAh g⁻¹ charge capacity for the initial cycle at 100 mAh g⁻¹ in the voltage range of 0.01–3 V (vs. Li⁺/Li). Even at high current density of 500 mAh g⁻¹, GeO₂/ZnWO₄@CNT nanocomposite shows 231 mAh g⁻¹ and 257 mAh g⁻¹ charge/discharge capacity which are higher than that of GeO₂/ZnWO₄ nanocomposite. The GeO₂/ZnWO₄@CNT nanocomposite delivers 75.8% capacity retention and 100% coulombic efficiency even after 400 cycles at 300 mAh g⁻¹. These results direct that GeO₂/ZnWO₄@CNT nanocomposite is a good negative electrode for lithium-ion battery.

采用单步溶剂热法制备了单壁碳纳米管包裹的GeO ₂ / ZnWO ₄纳米复合材料。在这项工作中，通过改变GeO ₂的摩尔百分比并进一步添加SWCNT作为复合材料以提高电化学性能，制备了GeO ₂ / ZnWO ₄纳米复合材料。制备的GeO ₂ / ZnWO ₄纳米复合材料和GeO ₂ / ZnWO ₄ @CNT纳米复合材料用作锂离子电池（LIB）的负极材料。不出所料，GeO ₂ / ZnWO ₄ @CNT纳米复合材料比GeO ₂具有更高的容量和良好的倍率性能/ ZnWO ₄纳米复合材料。GeO ₂ / ZnWO ₄ @CNT纳米复合材料在^0.01到3 V的电压范围内，在100 mAh g ^-1的初始循环中表现出930 mAh g ^-1的放电容量和533 mAh g ^-1的充电容量（vs. Li ⁺ /李）。即使在500 mAh g ^-1的高电流密度下，GeO ₂ / ZnWO ₄ @CNT纳米复合材料的231 mAh g ^-1和257 mAh g ^-1的充放电容量也高于GeO ₂ / ZnWO ₄纳米复合材料。GeO ₂ / ZnWO ₄@CNT纳米复合材料即使在300 mAh g ^-1下进行400次循环后仍可提供75.8％的容量保持率和100％的库伦效率。这些结果表明，GeO ₂ / ZnWO ₄ @CNT纳米复合材料是锂离子电池的良好负极。