Lignin and its derivatives hold great potential in developing high performance porous carbon materials for supercapacitors due to the versatile features of high carbon content, abundant multifunctional groups, low cost, and environmental benefits. Unfortunately, their derived porous carbon generally has the features of unfavorable microporous-dominated morphologies and low specific surface area (SSA) attributed from the highly-branched structure of lignin, which are hardly suitable for the supercapacitors with ionic liquid (IL) electrolyte, leading to poor energy density and rate capability. Herein, porous carbon materials with desirable mesoporous contributions from sodium lignosulphonate are designed via a facile template method. Such rich mesoporisity carbon materials not only possess with three-dimensional interconnected network, large SSA, as well as favorable pore size distribution for accelerated ion and electron mass transfer, but also feature low heteroatom content for high electrochemical stability. Consequently, the optimal electrode exhibits a high capacitance of 166 F/g at 0.5 A/g, superior rate performance (59 Wh/kg at 59 kW/kg), as well as impressive cycle life with good capacitance retention of 93.1% in EMIBF₄ electrolytes. The present work opens a new avenue to design porous carbon materials with high mesopore properties from lignin for effective compatibility with IL electrolyte in high-performance supercapacitors.

木质素及其衍生物具有碳含量高、多功能基团丰富、成本低、环境效益高等优点，在开发超级电容器用高性能多孔碳材料方面具有巨大潜力。不幸的是，它们衍生的多孔碳通常具有不利的微孔主导形貌和木质素的高度支化结构导致的低比表面积（SSA）的特征，这很难适合离子液体（IL）电解质的超级电容器，导致能量密度和倍率性能较差。在此，通过木质素磺酸钠设计了具有所需介孔贡献的多孔碳材料一种简单的模板方法。这种富介孔碳材料不仅具有三维互连网络、大的SSA以及有利于加速离子和电子传质的孔径分布，而且还具有低杂原子含量以实现高电化学稳定性。因此，最佳电极在 0.5 A/g 电流下表现出 166 F/g 的高电容、卓越的倍率性能（在 59 kW/kg 电流下为 59 Wh/kg），以及令人印象深刻的循环寿命，在 EMIBF 4 电解质中具有 93.1% 的良好电容保持_率。目前的工作开辟了一条新途径，从木质素中设计具有高介孔特性的多孔碳材料，以与高性能超级电容器中的离子液体电解质有效相容。