Using biowastes as precursors for the preparation of value-added nanomaterials is critical to the sustainable development of devices. Lignosulphonates are the by-products of pulp and paper-making industries and usually discarded as wastes. In the present study, lignosulphonate is used as the precursor to prepare hierarchical ordered porous carbon with interconnected pores for the electrochemical energy storage application. The unique molecular structure and properties of lignosulphonate ensure the acquisition of high-quality porous carbon with a controllable pore structure and improved physical properties. As a result, the as-prepared hierarchical order porous carbon show excellent energy storage performance when used to assemble the symmetric supercapacitor, which exhibits high-specific capacitance of 289 F g-1 at a current density of 0.5 A g-1, with the energy density of 40 Wh kg-1 at the power density of 900 W kg-1. The present study provides a promising strategy for the fabrication of high-performance energy storage devices at low cost.

中文翻译：

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高性能超级电容器电极用Biowaste的互连多孔碳与有序孔互连。

使用生物废物作为制备增值纳米材料的前体对于设备的可持续发展至关重要。木质素磺酸盐是纸浆和造纸工业的副产品，通常作为废物丢弃。在本研究中，木质素磺酸盐用作前体来制备具有互连孔的分层有序多孔碳，用于电化学储能。木质素磺酸盐的独特分子结构和性能可确保获得具有可控孔结构和改善的物理性能的高质量多孔碳。结果，所制备的分级多孔碳在用于组装对称超级电容器时显示出优异的储能性能，该对称超级电容器在电流密度为0.5 A g-1时表现出289 F g-1的高比电容，功率密度为900 W kg-1时的能量密度为40 Wh kg-1。本研究为低成本制造高性能储能装置提供了一种有希望的策略。