Recent studies demonstrate that cobalt silicate-based materials are considered as the potential electrode materials for supercapacitors (SCs). However, improving the conductivity of Co₂SiO₄ remains a pressing priority. Herein, the sandwich-like honeycomb Co₂SiO₄/rGO/honeycomb Co₂SiO₄ structures are developed to improve the electrochemical capabilities of Co₂SiO₄ by using the sandwich-like GO/SiO₂ as template and with a moderate hydrothermal method. Co₂SiO₄ nanosheets on the surface of rGO are interconnected to form the 3D honeycomb-like structures. This strategy, “Two for one” construction, means that we put the two-phase (Co₂SiO₄ and rGO) into one-phase (Co₂SiO₄/rGO integrated composite) to avoid the low electronic transmission problem of the traditional two-phase hybrid method. The s-rGO/Co₂SiO₄ electrode exhibits the specific capacitance of 429 F g⁻¹ at 0.5 A g⁻¹, which is superior to the capacitance of Co₂SiO₄ and rGO + Co₂SiO₄. The s-rGO/Co₂SiO₄//AC HSC delivers the areal capacitances of 651 mF cm⁻² at 1 mA cm⁻², and powers the bulb more than 300 s, which is strongly related to the energized capacitance s-rGO/Co₂SiO₄. This work not only proves that the s-rGO/Co₂SiO₄ can improve the electrochemical properties of Co₂SiO₄, but also provides a strategy for the synthesis of metal silicates/rGO/metal silicates sandwich-like structures with enhanced electrochemical performances for energy storage and conversion.

最近的研究表明，硅酸钴基材料被认为是超级电容器（SCs）的潜在电极材料。然而，提高Co ₂ SiO ₄的电导率仍然是紧迫的任务。在此，以三明治状GO / SiO ₂为模板，以适度的水热法开发了三明治状蜂窝状的Co ₂ SiO ₄ / rGO /蜂窝状Co ₂ SiO ₄结构，以提高Co ₂ SiO ₄的电化学性能。。Co ₂ SiO ₄rGO表面上的纳米片相互连接以形成3D蜂窝状结构。这种“二为一”构造策略意味着我们将两相（Co ₂ SiO ₄和rGO）放入一相（Co ₂ SiO ₄ / rGO集成复合材料）中，以避免传统技术的低电子传输问题两相混合法。s-rGO / Co ₂ SiO ₄电极 在0.5 A g ^-1处具有429 F g ^-1的比电容，优于Co ₂ SiO ₄和rGO + Co ₂ SiO ₄的电容。s-rGO / Co ₂ SiO₄ // AC HSC 在1 mA cm ^-2时提供651 mF cm ^-2的面积电容，并向灯泡供电300 s以上，这与通电的电容s-rGO / Co ₂ SiO ₄密切相关。这项工作不仅证明了S-RGO / Co的₂的SiO ₄可以提高Co的电化学性能₂的SiO ₄，而且还提供了策略的金属硅酸盐的合成/ RGO /金属硅酸盐夹着样具有增强的电化学性能的结构用于能量存储和转换。