Zinc silicates are an appealing feature for electrode materials in Li-ion battery owing to their layered structure providing a well-defined and facile Li ion transportation route. However, the poor conductivity of zinc silicates limits their wide application as electrode materials, and furthermore zinc silicates have not been explored to apply to supercapacitor. Herein, three-dimensional N, S-doped C-Zn₄Si₂O₇(OH)₂·H₂O (3D C-ZnSi) have been developed by a hydrothermal process from a highly available and recyclable plant biomass – bamboo leaves, composed of organic compound and silica, for the application to supercapacitor. This is about zinc silicate first applied to supercapacitor. The as-prepared electrode materials have extensive pores inherited from biological structures of bamboo leaves, including micropores, mesopores and macropores. Owing to the existence of hierarchical pores, the single electrode presents excellent capacitance of 450 mF cm⁻² at 5 mV s⁻¹, and excellent cyclic performance with the retention of 83% after 10,000 cycles. Furthermore, the as-assembled 3D C-ZnSi//activated carbon (3D C-ZnSi//AC) flexible solid-state asymmetric supercapacitor can achieve a maximum energy density of 0.69 Wh m⁻². Additionally, the device exhibits high cycle stability for 6900 cycles with the retention of 80%. This study shows the possibility for 3D N,S doped C-Zn₄Si₂O₇(OH)₂·H₂O as one of the most promising candidates for high performance energy storage devices.

硅酸锌是锂离子电池电极材料的吸引人的特性，因为它们的层状结构提供了明确且方便的锂离子传输路径。但是，硅酸锌的导电性差，限制了其作为电极材料的广泛应用，此外，还没有探索将硅酸锌用于超级电容器。在此，三维N，S掺杂的C-Zn ₄ Si ₂ O ₇（OH）₂ ·H ₂O（3D C-ZnSi）是通过水热工艺从高度可用且可回收的植物生物量–由有机化合物和二氧化硅组成的竹叶中开发出来的，用于超级电容器。这是关于首先应用于超级电容器的硅酸锌。所制备的电极材料具有从竹叶的生物结构继承的大孔，包括微孔，中孔和大孔。由于存在分层的孔，单个电极在5 mV s ^-1时具有450 mF cm ^-2的出色电容，并具有出色的循环性能，在10,000次循环后保留率达83％。此外，组装后的3D C-ZnSi //活性炭（3D C-ZnSi // AC）柔性固态不对称超级电容器可以实现0.69 Wh m ^-2的最大能量密度。此外，该器件在6900个循环中显示出高循环稳定性，保留率达80％。这项研究表明，掺杂3D N，S的C-Zn ₄ Si ₂ O ₇（OH）₂ ·H ₂ O可能成为高性能储能器件最有希望的候选者之一。