Wood-based electrodes are widely used in supercapacitors due to their renewable and three-dimensional self-supported properties. Low space utilization of wood-based electrodes seriously restricts its practical applications. In this paper, a wood/phenolic resin composite was designed, which can effectively enhance the space utilization of wood and ensure a hierarchical porous structure. The prepared balsa wood/phenolic resin composite-derived electrode obtained a high areal capacitance (8169 mF cm), which is 954 % of pure balsa wood-based electrode. Moreover, the assembled symmetrical supercapacitor device exhibits outstanding electrochemical performance, displaying a high areal capacitance of 3.3 F cm, and a competitive volumetric energy density of 2.88 mWh cm. More importantly, this design has been successfully used to prepare various species wood-derived electrodes. Therefore, as a general strategy, which gives a novel idea for the design of wood-derived electrodes and may affect other fields using wood-based materials.

中文翻译：

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用于高面积电容超级电容器的酚醛树脂填充木材衍生的分层多孔碳整体料


木质电极因其可再生和三维自支撑的特性而广泛应用于超级电容器。木质电极空间利用率低严重限制了其实际应用。本文设计了一种木材/酚醛树脂复合材料，可以有效提高木材的空间利用率并确保分层多孔结构。制备的轻木/酚醛树脂复合材料电极获得了高面积电容（8169 mF·cm），是纯轻木电极的954%。此外，组装的对称超级电容器装置表现出出色的电化学性能，具有3.3Fcm的高面积电容和2.88 mWh cm的有竞争力的体积能量密度。更重要的是，该设计已成功用于制备各种木材来源的电极。因此，作为一种总体策略，这为木质电极的设计提供了新颖的思路，并可能影响其他使用木质材料的领域。