Cocozelle is essentially consisted of hemicellulose and lignin with a hierarchically porous structure. Herein, cocozelle slices after freeze-drying were employed as green substrates to support the growth of polypyrrole (PPy) via a facile oxidative polymerization approach. The cocozelle surface was densely covered with sheet-like PPy due to the hydrogen bonding between PPy and cocozelle. The PPy/cocozelle composites could be facilely utilized as supercapacitor electrodes, which showed a high specific capacitance of 1108 F g⁻¹ with an energy density of 70.5 Wh kg⁻¹ and a power density of 398 W kg⁻¹ at a charge/discharge current density of 0.8 mA cm⁻² as well as desirable cycling life with a capacitance retention rate of 76.9 % after 1000 cycles. Moreover, 95.3 % of the initial specific capacitance obtained at 0.2 mA cm⁻² could be reached as the current density increased to 1.6 mA cm⁻². These results demonstrate that cocozelle could be used as a superior alternative biomass-derived substrate for the developments of eco-friendly and renewable energy storage devices.

Cocozelle基本上由具有分层多孔结构的半纤维素和木质素组成。在本文中，冷冻干燥后的椰油切片被用作绿色底物，以通过容易的氧化聚合方法来支持聚吡咯（PPy）的生长。由于PPy和cocozelle之间的氢键作用，cocozelle表面被片状PPy密集地覆盖。PPy / cocozelle复合材料可以方便地用作超级电容器电极，在充电/放电时显示出1108 F g ^-1的高比电容，70.5 Wh kg ^-1的能量密度和398 W kg ^-1的功率密度电流密度0.8 mA cm ^-21000次循环后的电容保持率为76.9％。此外，随着电流密度增加到1.6 mA cm ^-2，可以达到在0.2 mA cm ^-2处获得的初始比电容的95.3％。这些结果表明，cocozelle可以用作开发生态友好型和可再生能源存储设备的优良替代生物质衍生基质。